Electrocatalytic nitrate reduction reaction (NO_(3)-RR) to ammonia under ambient conditions is expected to be a green process for ammonia synthesis and alleviate water pollution issues.We report a CuO nanoparticles in...Electrocatalytic nitrate reduction reaction (NO_(3)-RR) to ammonia under ambient conditions is expected to be a green process for ammonia synthesis and alleviate water pollution issues.We report a CuO nanoparticles incorporated on nitrogen-doped porous carbon (CuO@NC) catalyst for NO_(3)-RR.Part of Cu(Ⅱ) is reduced to Cu(Ⅰ) during the NO_(3)-RR process to construct Cu(Ⅰ)-Cu(Ⅱ) pairs,confirmed by in situ X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy.Density functional theory (DFT) calculations indicated that the formation of Cu(Ⅰ) could provide a reaction path with smaller energy barrier for NO_(3)-RR,while Cu(Ⅱ) effectively suppressed the competition of hydrogen evolution reaction (HER).As a result,CuO@NC catalyst achieved a Faradaic efficiency of 84.2% at -0.49 V versus reversible hydrogen electrode (RHE),and a NH_(3)yield rate of 17.2 mg h^(-1)mg^(-1)cat.at -0.79 V vs.RHE,higher than the HaberBosch process (<3.4 g h^(-1)g^(-1)cat.).This work may open a new avenue for effective NO_(3)-RR by modulating oxidation states.展开更多
Xiamen,China-June 22-25,2025-The 2nd International Symposium on AI for Electrochemistry(iSAIEC 2025)was grandly held at Xiamen University.The International Society of Electrochemistry(ISE)first joining as a co-organiz...Xiamen,China-June 22-25,2025-The 2nd International Symposium on AI for Electrochemistry(iSAIEC 2025)was grandly held at Xiamen University.The International Society of Electrochemistry(ISE)first joining as a co-organizer supports"Poster Prize"to honor outstanding contributions from young researchers.展开更多
You are cordially invited to the 40th Topical Meeting of the International Society of Electrochemistry,which will be held from 15 to 17 August 2025 in Changchun,China.Changchun is a City of Science,Education,and Resor...You are cordially invited to the 40th Topical Meeting of the International Society of Electrochemistry,which will be held from 15 to 17 August 2025 in Changchun,China.Changchun is a City of Science,Education,and Resort with a population of more than 9 million.展开更多
4月7日,SJR期刊排名(Scimago Journal&Country Rank)2024版发布,《电化学(中英文)》(Journal of Electrochemistry,J.Electrochem.)首次进入Materials Science学科Surfaces,Coatings and Films类别Q1区。SJR排名指标依据Scopus数据...4月7日,SJR期刊排名(Scimago Journal&Country Rank)2024版发布,《电化学(中英文)》(Journal of Electrochemistry,J.Electrochem.)首次进入Materials Science学科Surfaces,Coatings and Films类别Q1区。SJR排名指标依据Scopus数据库(Elsevier B.V.)中的数据计算得出.。展开更多
We introduce our state-of-the art of“vacuum consistent electrochemistry”to an investigation of the interfaces between oxides and ionic liquid(IL).Pulsed laser deposition(PLD)has been one of the powerful and sophisti...We introduce our state-of-the art of“vacuum consistent electrochemistry”to an investigation of the interfaces between oxides and ionic liquid(IL).Pulsed laser deposition(PLD)has been one of the powerful and sophisticated techniques to realize nanoscale preparation of high-quality epitaxial oxide thin films.On the other hand,electrochemistry is a simple,very sensitive,and non-destructive analysis technique for solid-liquid interfaces.To ensure the reproducibility in experiment of the interfaces of such epitaxial oxide films,as well as bulk oxide single-crystals,with IL,we employ a home-built PLD-electrochemical(EC)system with IL as an electrolyte.The system allows one to perform all-in-vacuum experiments during the preparation of well-defined oxide electrode surfaces to their electrochemical analyses.The topics include electrochemical evaluations of the oxide’s own properties,such as carrier density and relative permittivity,and the interfacial properties of oxides in contact with IL,such as flat band potential and electric double layer(EDL)capacitance,ending with future perspectives in all-solid-state electrochemistry.展开更多
近日,衡量期刊国际影响力的重要指标CiteScore 2024(引用分)由Elsevier发布。《电化学(中英文)》(Journal of Electrochemistry)在2021-2024四年间共发表论文242篇,这些论文在这四年间总计被引用1012次。Journal of Electrochemistry的2...近日,衡量期刊国际影响力的重要指标CiteScore 2024(引用分)由Elsevier发布。《电化学(中英文)》(Journal of Electrochemistry)在2021-2024四年间共发表论文242篇,这些论文在这四年间总计被引用1012次。Journal of Electrochemistry的2024年度最新CiteScore指数为4.2,CiteScoreTracker 2025指数为5.4,相比2023年大幅度提升(2023年度该指数为2.9)。展开更多
《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门...《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门大学共同主办,表界面化学全国重点实验室和惠州亿纬锂能股份有限公司协办,向国内外公开发行。《电化学(中英文)》旨在及时报道我国电化学领域的最新科研成果和动态,促进国内及国际的学术交流。《电化学(中英文)》遵循国际通行的办刊惯例,实行主编、副主编负责制,所有刊出稿件均必须经过双盲同行评议。展开更多
《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门...《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门大学共同主办,表界面化学全国重点实验室和惠州亿纬锂能股份有限公司协办,向国内外公开发行。展开更多
Metal-organic frameworks(MOFs),with their ultrahigh specific surface area,uniformly distributed pores,and tunable structures,are promising candidates for next-generation active electrode materials in lithium-ion batte...Metal-organic frameworks(MOFs),with their ultrahigh specific surface area,uniformly distributed pores,and tunable structures,are promising candidates for next-generation active electrode materials in lithium-ion batteries(LIBs).However,their application is hindered by poor cycling stability due to structural collapse during charge-discharge cycles.To address this issue,we developed an alloy and multi-solvent thermal method strategy to synthesize Co/Zn bimetallic MOFs based on Naphthalenetetracarboxylic acid(NTCA).The resulting petal-like Co/Zn-NTCA MOF demonstrates outstanding electrochemical performance.The incorporation of zinc ions not only significantly enhances cycling stability but also markedly increases the specific capacity of the anode material.At a current density of 200 mA·g^(-1),the Co/Zn(2:1)-NTCA MOF demonstrated an impressive reversible capacity of 956 mA·h·g^(-1) after 150 cycles.Even after 500 cycles,the specific capacity of the electrode remained high,with a value of 438 mA·h·g^(-1) at a current density of 1000 A·g^(-1).展开更多
The impact of Bacillus subtilis(B.subtilis)on the corrosion behavior(microbiologically influenced corrosion)of two aluminum alloys—7075 aluminum alloy(AA7075)and 2024 aluminum alloy(AA2024)—is investigated in a high...The impact of Bacillus subtilis(B.subtilis)on the corrosion behavior(microbiologically influenced corrosion)of two aluminum alloys—7075 aluminum alloy(AA7075)and 2024 aluminum alloy(AA2024)—is investigated in a high-salinity environment.The corrosion mechanism is explored by observing the bacterial growth process and the corresponding measurements.The assessment involves the analysis of surface morphology,corrosion mass loss,and electrochemical tests.Surface morphology reveals the development of B.subtilis and biofilm formation on the surface of the aluminum alloys.Both mass loss and electrochemical tests illustrate the corrosion inhibition effect of B.subtilis on aluminum alloys in a high-salt environment.AA7075 alloy was more affected by the biofilm and had a more pronounced corrosion inhibition effect.After 10 d of testing,in B.subtilis group,AA7075 and AA2024 bode values were elevated by 0.32×10^(4) and 0.24×10^(4)Ω,respectively.The open circuit potential of AA2024 decreased by−0.107 A/cm^(2) under the influence of bacteria,and the dynamic potentiodynamic polarization curve shifted significantly to the left.展开更多
The intricate sulfur redox chemistry involves multiple electron transfers and complicated phase changes.Catalysts have been previously explored to overcome the kinetic barrier in lithium-sulfur batteries(LSBs).This wo...The intricate sulfur redox chemistry involves multiple electron transfers and complicated phase changes.Catalysts have been previously explored to overcome the kinetic barrier in lithium-sulfur batteries(LSBs).This work contributes to closing the knowledge gap and examines electrocatalysis for enhancing LSB kinetics.With a strong chemical affinity for polysulfides,the electrocatalyst enables efficient adsorption and accelerated electron transfer reactions.Resulting cells with catalyzed cathodes exhibit improved rate capability and excellent stability over 500 cycles with 91.9%capacity retention at C/3.In addition,cells were shown to perform at high rates up to 2C and at high sulfur loadings up to 6 mg cm^(-2).Various electrochemical,spectroscopic,and microscopic analyses provide insights into the mechanism for retaining high activity,coulombic efficiency,and capacity.This work delves into crucial processes identifying pivotal reaction steps during the cycling process at commercially relevant areal capacities and rates.展开更多
A day in the life of the corrosion laboratory of Cepel is a dynamic experience with interdisciplinary activities involving several pieces of equipment,materials and analytical techniques aimed at understanding and pre...A day in the life of the corrosion laboratory of Cepel is a dynamic experience with interdisciplinary activities involving several pieces of equipment,materials and analytical techniques aimed at understanding and preventing the effects of corrosion in assets of the Brazilian electric sector.This article presents highlighted activated of the day to life in the laboratory including surface and sample preparation,organic coatings,electrochemical techniques,accelerated corrosion tests,corrosivity of atmosphere and determination of corrosion rate,soil corrosion and quality control of galvanized steel.展开更多
The large-scale use of ample marine energy will be one of the most important ways for human to achieve sustainable development through carbon neutral development plans.As a burgeoning technological method for electrom...The large-scale use of ample marine energy will be one of the most important ways for human to achieve sustainable development through carbon neutral development plans.As a burgeoning technological method for electromechanical conversion,triboelectric nanogenerator(TENG)has significant advantages in marine energy for its low weight,cost-effectiveness,and high efficiency in low-frequency range.It can realize the efficient and economical harvesting of low-frequency blue energy by constructing the floating marine energy harvesting TENG.This paper firstly introduces the power transfer process and structural composition of TENG for marine energy harvesting in detail.In addition,the latest research works of TENG on marine energy harvesting in basic research and structural design are systematically reviewed by category.Finally,the advanced research progress in the power take-off types and engineering study of TENG with the marine energy are comprehensively generalized.Importantly,the challenges and problems faced by TENG in marine energy and in situ electrochemical application are summarized and the corresponding prospects and suggestions are proposed for the subsequent development direction and prospects to look forward to promoting the commercialization process of this field.展开更多
The plasma-coupled electrocatalytic cascade technology with NO_x~-as intermediate product is a potential method to realize green ammonia synthesis.The matching of the formation rate and consumption rate of NO_(2)^(-)a...The plasma-coupled electrocatalytic cascade technology with NO_x~-as intermediate product is a potential method to realize green ammonia synthesis.The matching of the formation rate and consumption rate of NO_(2)^(-)as the main absorption product is an important prerequisite for the system to achieve stable operation.Therefore,this paper firstly emphasizes the importance of operating parameters on the cascade system based on the single factor experiment.Secondly,the empirical equation between electrocatalytic operating conditions and NO_(2)^(-)consumption rate was established by response surface analysis.Based on this equation,the electrocatalytic operating parameters were optimized to achieve the dynamic equilibrium between NO_(2)^(-)formation rate and consumption rate.Finally,the techno-economic assessment model was established to calculate the levelized cost of ammonia based on the cascade system,and the single-variable sensitivity analysis was performed to provide the clear guidance for cost reduction.展开更多
By enhancing surface interaction between metal oxide particles and carbon-based materials,it can effectively improve Faraday capacitance and conductivity,ultimately achieving high energy density with sufficient redox ...By enhancing surface interaction between metal oxide particles and carbon-based materials,it can effectively improve Faraday capacitance and conductivity,ultimately achieving high energy density with sufficient redox reactions in supercapacitors.Through a gentle biomineralization process and subsequent thermal reduction strategy,we successfully prepared the graphene oxide(GO)wrapping mixed-valence manganese oxides(MnO_(x))and S,P self-codoped carbon matrix porous composite(MnO_(x)@SPC@reduced graphene oxide(RGO)).During the biomineralization process of engineered Pseudomonas sp.(Ml)cells,GO nanosheets functioned as the'soil'to adsorb Mn^(2+)ion and uniformly disperse biogenic Mn oxides(BMO).After undergoing annealing,the MnO_(x) nanoparticles were evenly wrapped with graphene,resulting in the creation of the MnO_(x)@SPC@RGO3 composite.This composite possesses strong C—O—Mn bond interfaces,numerous electroactive sites,and a uniform pore structure.By optimizing the synergistic interaction between the highly conductive graphene and the remarkable surface capacitance of MnO_(x),the MnO_(x)@SPC@RGO3 electrode,with its intercalation Faraday reactions mechanism of■transformations,exhibits an outstanding specific capacity(448.3 F·g^(-1)at 0.5 A·g^(-1)),multiplying performance(340.5 F·g^(-1)at10 A·g^(-1)),and cycling stability(93.8%retention after 5000 cycles).Moreover,the asymmetric all-solidstate supercapacitors of MnO_(x)@SPC@RGO3//PC exhibit an exceptional energy density of 64.8 W·h·kg^(-1)and power density of 350 W·kg^(-1),as well as a long lifespan with capacitance retention of 92.5%after10000 cycles.In conclusion,the synthetic route utilizing biomineralization and thermal reduction exhibits significant potential for exploiting high-performance electrode materials in all-solid-state supercapacitor applications.展开更多
Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO_(2)emissions,as bicarbonate can be efficiently generated from the capture of atmospheric CO_(2)usi...Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO_(2)emissions,as bicarbonate can be efficiently generated from the capture of atmospheric CO_(2)using alkaline solutions with reactive absorption.In this work,we present a CO_(2)-mediated bicarbonate conversion to pure formate using a cation exchange membrane-based electrolyzer with a 25 cm^(2)electrode area.Our electrolysis achieved selectivities exceeding 75%for formate at a total current of 2.5 A,achieving formate concentrations up to 1.2 M and yields as high as 95%over extended periods.The techno-economic assessment confirmed the economic viability of the process,highlighting the potential for bicarbonate electrolysis as a sustainable method for producing valuable chemicals.展开更多
To solve the serious volume expansion problem of Sb-based anode materials in the alloying/dealloying process,a strategy combining electrospinning and hydrogen reduction is proposed to prepare a series of Sb-based allo...To solve the serious volume expansion problem of Sb-based anode materials in the alloying/dealloying process,a strategy combining electrospinning and hydrogen reduction is proposed to prepare a series of Sb-based alloys/carbon nanofiber composites(SbM/CNFs,M=Co,Zn,Ni).Inactive elements are innovatively introduced to form Sb based alloys with enhanced stability.The results show that the content of SbCo nanoparticles is high to 69.12%(mass),which are uniformly dispersed in carbon fibers.When evaluated as anode material for SIBs,SbCo/CNFs anode exhibits excellent sodium storage capacity,the initial discharge capacity is 580.0 mA h·g^(-1)at 0.1 A g^(-1),which can hold 483.5 mA h·g^(-1)after 100 cycles.Even the current density increases to 1.0 A g^(-1),the specific capacity still maintains at 344.5 mA h·g^(-1)after 150 cycles.The improved sodium storage capacity is attributed to the synergistic effect of conductive carbon fibers and SbCo nanoparticles with uniform dispersion,which not only provide excellent electronic conductivity,but also enhance structural stability to reduce volume change.展开更多
The corrosion behaviors of an as-cast FeCoNiAl_(0.75)Cr_(1.25)high-entropy alloy(HEA)in acidic Na_(2)SO_(4)solution with different pH values were investigated.The results indicate that the as-cast FeCoNiAl_(0.75)Cr_(1...The corrosion behaviors of an as-cast FeCoNiAl_(0.75)Cr_(1.25)high-entropy alloy(HEA)in acidic Na_(2)SO_(4)solution with different pH values were investigated.The results indicate that the as-cast FeCoNiAl_(0.75)Cr_(1.25)HEA is mainly composed of face-centered cubic phase,body-centered cubic(BCC1)phase(Co–Cr–Fe)and ordered BCC(B2)phase(Ni–Al),in which BCC1 phase and B2 phase have a eutectic microstructure.Moreover,the corrosion of B2 phase occurs preferentially in a 0.05 mol/L SO_(4)^(2−)acidic solution.The electrochemical measurement results show that the corrosion resistance of the investigated HEA significantly changes as the solution pH increases from 2 to 2.5.This indicates that there is a critical pH in the range of 2–2.5 that affects the corrosion of HEA.In addition,the results of X-ray photoelectron spectroscopy prove that the surface film of FeCoNiAl_(0.75)Cr_(1.25)in SO_(4)^(2−)solution is formed with Al_(2)O_(3)and Cr_(2)O_(3)as the main components,and The content of Al2O3 and Cr_(2)O_(3)increases with increasing solution pH.展开更多
Unstable Zn interface caused by rampant dendrite growth and parasitic side reactions always hinders the practical application of aqueous zinc metal batteries(AZMBs),Herein,tyrosine(Tyr)with high molecular polarity was...Unstable Zn interface caused by rampant dendrite growth and parasitic side reactions always hinders the practical application of aqueous zinc metal batteries(AZMBs),Herein,tyrosine(Tyr)with high molecular polarity was introduced into aqueous electrolyte to modulate the interfacial electrochemistry of Zn anode.In AZMBs,the positively charged side of Tyr can be well adsorbed on the surface of Zn anode to form a water-poor layer,and the exposed carboxylate side can be easily coordinated with Zn^(2+),favoring inducing uniform plating of Zn^(2+)and inhibiting the occurrence of water-induced side reactions.These in turn enable the achievement of highly stable Zn anode.Accordingly,the Zn anodes achieve outstanding cyclic stability(3000 h at 2 mA cm^(-2),2 mA h cm^(-2)and 1300 h at 5 mA cm^(-2),5 mA h cm^(-2)),high average Coulombic efficiency(99.4%over 3200 cycles),and high depth of discharge(80%for 500 h).Besides,the assembled Zn‖NaV_(3)O_(8)·1.5H_(2)O full cells deliver remarkable capacity retention and ultra-long lifetime(61.8%over 6650 cycles at 5 A g^(-1))and enhanced rate capability(169 mA h g^(-1)at 5 A g^(-1)).The work may promote the design and deep understanding of electrolyte additives with high molecular polarity for high-performance AZMBs.展开更多
基金National Natural Science Foundation of China (52371228, 52402045)fund of Key Laboratory of Advanced Materials of Ministry of Education(Advmat-2414)。
文摘Electrocatalytic nitrate reduction reaction (NO_(3)-RR) to ammonia under ambient conditions is expected to be a green process for ammonia synthesis and alleviate water pollution issues.We report a CuO nanoparticles incorporated on nitrogen-doped porous carbon (CuO@NC) catalyst for NO_(3)-RR.Part of Cu(Ⅱ) is reduced to Cu(Ⅰ) during the NO_(3)-RR process to construct Cu(Ⅰ)-Cu(Ⅱ) pairs,confirmed by in situ X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy.Density functional theory (DFT) calculations indicated that the formation of Cu(Ⅰ) could provide a reaction path with smaller energy barrier for NO_(3)-RR,while Cu(Ⅱ) effectively suppressed the competition of hydrogen evolution reaction (HER).As a result,CuO@NC catalyst achieved a Faradaic efficiency of 84.2% at -0.49 V versus reversible hydrogen electrode (RHE),and a NH_(3)yield rate of 17.2 mg h^(-1)mg^(-1)cat.at -0.79 V vs.RHE,higher than the HaberBosch process (<3.4 g h^(-1)g^(-1)cat.).This work may open a new avenue for effective NO_(3)-RR by modulating oxidation states.
文摘Xiamen,China-June 22-25,2025-The 2nd International Symposium on AI for Electrochemistry(iSAIEC 2025)was grandly held at Xiamen University.The International Society of Electrochemistry(ISE)first joining as a co-organizer supports"Poster Prize"to honor outstanding contributions from young researchers.
文摘You are cordially invited to the 40th Topical Meeting of the International Society of Electrochemistry,which will be held from 15 to 17 August 2025 in Changchun,China.Changchun is a City of Science,Education,and Resort with a population of more than 9 million.
文摘4月7日,SJR期刊排名(Scimago Journal&Country Rank)2024版发布,《电化学(中英文)》(Journal of Electrochemistry,J.Electrochem.)首次进入Materials Science学科Surfaces,Coatings and Films类别Q1区。SJR排名指标依据Scopus数据库(Elsevier B.V.)中的数据计算得出.。
文摘We introduce our state-of-the art of“vacuum consistent electrochemistry”to an investigation of the interfaces between oxides and ionic liquid(IL).Pulsed laser deposition(PLD)has been one of the powerful and sophisticated techniques to realize nanoscale preparation of high-quality epitaxial oxide thin films.On the other hand,electrochemistry is a simple,very sensitive,and non-destructive analysis technique for solid-liquid interfaces.To ensure the reproducibility in experiment of the interfaces of such epitaxial oxide films,as well as bulk oxide single-crystals,with IL,we employ a home-built PLD-electrochemical(EC)system with IL as an electrolyte.The system allows one to perform all-in-vacuum experiments during the preparation of well-defined oxide electrode surfaces to their electrochemical analyses.The topics include electrochemical evaluations of the oxide’s own properties,such as carrier density and relative permittivity,and the interfacial properties of oxides in contact with IL,such as flat band potential and electric double layer(EDL)capacitance,ending with future perspectives in all-solid-state electrochemistry.
文摘近日,衡量期刊国际影响力的重要指标CiteScore 2024(引用分)由Elsevier发布。《电化学(中英文)》(Journal of Electrochemistry)在2021-2024四年间共发表论文242篇,这些论文在这四年间总计被引用1012次。Journal of Electrochemistry的2024年度最新CiteScore指数为4.2,CiteScoreTracker 2025指数为5.4,相比2023年大幅度提升(2023年度该指数为2.9)。
文摘《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门大学共同主办,表界面化学全国重点实验室和惠州亿纬锂能股份有限公司协办,向国内外公开发行。《电化学(中英文)》旨在及时报道我国电化学领域的最新科研成果和动态,促进国内及国际的学术交流。《电化学(中英文)》遵循国际通行的办刊惯例,实行主编、副主编负责制,所有刊出稿件均必须经过双盲同行评议。
文摘《电化学(中英文)》(Journal of Electrochemistry,缩写为J.Electrochem.)为中国化学会电化学专业委员会会刊,是中国第一个、也是唯一的融基础理论研究与技术应用为一体的电化学专业学术期刊,由中国科学技术协会主管、中国化学会和厦门大学共同主办,表界面化学全国重点实验室和惠州亿纬锂能股份有限公司协办,向国内外公开发行。
基金support from the National Natural Science Foundation of China for Youths(21701059)the Natural Science Foundation of Jiangsu Province for Youths(BK20170571)support from the Postgraduate Research&Practice Innovation Program of Jiangsu Province(SJCX24_2600).
文摘Metal-organic frameworks(MOFs),with their ultrahigh specific surface area,uniformly distributed pores,and tunable structures,are promising candidates for next-generation active electrode materials in lithium-ion batteries(LIBs).However,their application is hindered by poor cycling stability due to structural collapse during charge-discharge cycles.To address this issue,we developed an alloy and multi-solvent thermal method strategy to synthesize Co/Zn bimetallic MOFs based on Naphthalenetetracarboxylic acid(NTCA).The resulting petal-like Co/Zn-NTCA MOF demonstrates outstanding electrochemical performance.The incorporation of zinc ions not only significantly enhances cycling stability but also markedly increases the specific capacity of the anode material.At a current density of 200 mA·g^(-1),the Co/Zn(2:1)-NTCA MOF demonstrated an impressive reversible capacity of 956 mA·h·g^(-1) after 150 cycles.Even after 500 cycles,the specific capacity of the electrode remained high,with a value of 438 mA·h·g^(-1) at a current density of 1000 A·g^(-1).
基金supported by the National Natural Science Foundation of China(No.52073311)Guangdong Basic and Applied Basic Research Foundation(No.2021A1515012281)+1 种基金Guangdong-Hong Kong-Macao Joint Innovation Field Research Foundation(No.2023A0505010011)Zhuhai Industry University Research Cooperation Project(No.ZH22017001210148PWC).
文摘The impact of Bacillus subtilis(B.subtilis)on the corrosion behavior(microbiologically influenced corrosion)of two aluminum alloys—7075 aluminum alloy(AA7075)and 2024 aluminum alloy(AA2024)—is investigated in a high-salinity environment.The corrosion mechanism is explored by observing the bacterial growth process and the corresponding measurements.The assessment involves the analysis of surface morphology,corrosion mass loss,and electrochemical tests.Surface morphology reveals the development of B.subtilis and biofilm formation on the surface of the aluminum alloys.Both mass loss and electrochemical tests illustrate the corrosion inhibition effect of B.subtilis on aluminum alloys in a high-salt environment.AA7075 alloy was more affected by the biofilm and had a more pronounced corrosion inhibition effect.After 10 d of testing,in B.subtilis group,AA7075 and AA2024 bode values were elevated by 0.32×10^(4) and 0.24×10^(4)Ω,respectively.The open circuit potential of AA2024 decreased by−0.107 A/cm^(2) under the influence of bacteria,and the dynamic potentiodynamic polarization curve shifted significantly to the left.
基金financial support from Lion Battery Technologies IncThe computational works used Bridges-2 at Pittsburgh Supercomputing Center through allocation Discover MAT230033 from the Advanced Cyberinfrastructure Coordination Ecosystem:Services&Support(ACCESS)program,which is supported by National Science Foundation grants#2138259,#2138286,#2138307,#2137603,and#2138296The Bridges-2 system is supported by NSF award number ACI-1928147,at the Pittsburgh Supercomputing Center(PSC)。
文摘The intricate sulfur redox chemistry involves multiple electron transfers and complicated phase changes.Catalysts have been previously explored to overcome the kinetic barrier in lithium-sulfur batteries(LSBs).This work contributes to closing the knowledge gap and examines electrocatalysis for enhancing LSB kinetics.With a strong chemical affinity for polysulfides,the electrocatalyst enables efficient adsorption and accelerated electron transfer reactions.Resulting cells with catalyzed cathodes exhibit improved rate capability and excellent stability over 500 cycles with 91.9%capacity retention at C/3.In addition,cells were shown to perform at high rates up to 2C and at high sulfur loadings up to 6 mg cm^(-2).Various electrochemical,spectroscopic,and microscopic analyses provide insights into the mechanism for retaining high activity,coulombic efficiency,and capacity.This work delves into crucial processes identifying pivotal reaction steps during the cycling process at commercially relevant areal capacities and rates.
文摘A day in the life of the corrosion laboratory of Cepel is a dynamic experience with interdisciplinary activities involving several pieces of equipment,materials and analytical techniques aimed at understanding and preventing the effects of corrosion in assets of the Brazilian electric sector.This article presents highlighted activated of the day to life in the laboratory including surface and sample preparation,organic coatings,electrochemical techniques,accelerated corrosion tests,corrosivity of atmosphere and determination of corrosion rate,soil corrosion and quality control of galvanized steel.
基金supported by the Talent Fund of Beijing Jiaotong University(2023XKRC034)China National Postdoctoral Program for Innovative Talents(BX20230037)+3 种基金China Postdoctoral Science Foundation(2023M730205)National key research and development program(2021YFB3203202)Beijing Municipal Natural Science Foundation(4232074)Fundamental Research Funds for the Central Universities(2020JBZD011)。
文摘The large-scale use of ample marine energy will be one of the most important ways for human to achieve sustainable development through carbon neutral development plans.As a burgeoning technological method for electromechanical conversion,triboelectric nanogenerator(TENG)has significant advantages in marine energy for its low weight,cost-effectiveness,and high efficiency in low-frequency range.It can realize the efficient and economical harvesting of low-frequency blue energy by constructing the floating marine energy harvesting TENG.This paper firstly introduces the power transfer process and structural composition of TENG for marine energy harvesting in detail.In addition,the latest research works of TENG on marine energy harvesting in basic research and structural design are systematically reviewed by category.Finally,the advanced research progress in the power take-off types and engineering study of TENG with the marine energy are comprehensively generalized.Importantly,the challenges and problems faced by TENG in marine energy and in situ electrochemical application are summarized and the corresponding prospects and suggestions are proposed for the subsequent development direction and prospects to look forward to promoting the commercialization process of this field.
基金financially supported by National Key Research and Development Program of China(2020YFA0710000)National Natural Science Foundation of China(U22A20391,22308274)+2 种基金Postdoctoral Fellowship Program of CPSF(GZB20240600,2023TQ0265,2024M752589)Innovation Capability Support Program of Shaanxi(NO.2023-CX-TD-26)the Programme of Introducing Talents of Discipline to Universities(B23025)。
文摘The plasma-coupled electrocatalytic cascade technology with NO_x~-as intermediate product is a potential method to realize green ammonia synthesis.The matching of the formation rate and consumption rate of NO_(2)^(-)as the main absorption product is an important prerequisite for the system to achieve stable operation.Therefore,this paper firstly emphasizes the importance of operating parameters on the cascade system based on the single factor experiment.Secondly,the empirical equation between electrocatalytic operating conditions and NO_(2)^(-)consumption rate was established by response surface analysis.Based on this equation,the electrocatalytic operating parameters were optimized to achieve the dynamic equilibrium between NO_(2)^(-)formation rate and consumption rate.Finally,the techno-economic assessment model was established to calculate the levelized cost of ammonia based on the cascade system,and the single-variable sensitivity analysis was performed to provide the clear guidance for cost reduction.
基金supported by the National Natural Science Foundation of China(31900005)the Fund of Science and Technology Department of Henan Province(242102231001,242102320362,242102320157)+1 种基金the Fund of Program for Innovative Research Team(in Science and Technology)in University of Henan Province(23IRTSTHN009)Fund of Key Scientific Research Projects of Higher Education Institutions in Henan Province(22A150048)。
文摘By enhancing surface interaction between metal oxide particles and carbon-based materials,it can effectively improve Faraday capacitance and conductivity,ultimately achieving high energy density with sufficient redox reactions in supercapacitors.Through a gentle biomineralization process and subsequent thermal reduction strategy,we successfully prepared the graphene oxide(GO)wrapping mixed-valence manganese oxides(MnO_(x))and S,P self-codoped carbon matrix porous composite(MnO_(x)@SPC@reduced graphene oxide(RGO)).During the biomineralization process of engineered Pseudomonas sp.(Ml)cells,GO nanosheets functioned as the'soil'to adsorb Mn^(2+)ion and uniformly disperse biogenic Mn oxides(BMO).After undergoing annealing,the MnO_(x) nanoparticles were evenly wrapped with graphene,resulting in the creation of the MnO_(x)@SPC@RGO3 composite.This composite possesses strong C—O—Mn bond interfaces,numerous electroactive sites,and a uniform pore structure.By optimizing the synergistic interaction between the highly conductive graphene and the remarkable surface capacitance of MnO_(x),the MnO_(x)@SPC@RGO3 electrode,with its intercalation Faraday reactions mechanism of■transformations,exhibits an outstanding specific capacity(448.3 F·g^(-1)at 0.5 A·g^(-1)),multiplying performance(340.5 F·g^(-1)at10 A·g^(-1)),and cycling stability(93.8%retention after 5000 cycles).Moreover,the asymmetric all-solidstate supercapacitors of MnO_(x)@SPC@RGO3//PC exhibit an exceptional energy density of 64.8 W·h·kg^(-1)and power density of 350 W·kg^(-1),as well as a long lifespan with capacitance retention of 92.5%after10000 cycles.In conclusion,the synthetic route utilizing biomineralization and thermal reduction exhibits significant potential for exploiting high-performance electrode materials in all-solid-state supercapacitor applications.
基金National Natural Science Foundation of China(22379083)State Key Laboratory of Chemical Engineering(SKL-ChE-23T02)+2 种基金financial support from Beijing National Laboratory for Molecular Sciencessupport from Tsinghua International School’s Research Mentoring Programsupport from Tsinglan School’s Research Mentoring Program。
文摘Renewable energy-driven bicarbonate conversion to valuable chemicals presents an attractive strategy for mitigating CO_(2)emissions,as bicarbonate can be efficiently generated from the capture of atmospheric CO_(2)using alkaline solutions with reactive absorption.In this work,we present a CO_(2)-mediated bicarbonate conversion to pure formate using a cation exchange membrane-based electrolyzer with a 25 cm^(2)electrode area.Our electrolysis achieved selectivities exceeding 75%for formate at a total current of 2.5 A,achieving formate concentrations up to 1.2 M and yields as high as 95%over extended periods.The techno-economic assessment confirmed the economic viability of the process,highlighting the potential for bicarbonate electrolysis as a sustainable method for producing valuable chemicals.
基金supported by National Natural Science Foundation of China(22379056,22479065)Industry foresight and common key technology research in Carbon Peak and Carbon Neutrality Special Project from Zhenjiang city(CG2023003)+1 种基金Industry-University-Research Cooperation Project of Jiangsu Province(BY20230347)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(24KJB150008).
文摘To solve the serious volume expansion problem of Sb-based anode materials in the alloying/dealloying process,a strategy combining electrospinning and hydrogen reduction is proposed to prepare a series of Sb-based alloys/carbon nanofiber composites(SbM/CNFs,M=Co,Zn,Ni).Inactive elements are innovatively introduced to form Sb based alloys with enhanced stability.The results show that the content of SbCo nanoparticles is high to 69.12%(mass),which are uniformly dispersed in carbon fibers.When evaluated as anode material for SIBs,SbCo/CNFs anode exhibits excellent sodium storage capacity,the initial discharge capacity is 580.0 mA h·g^(-1)at 0.1 A g^(-1),which can hold 483.5 mA h·g^(-1)after 100 cycles.Even the current density increases to 1.0 A g^(-1),the specific capacity still maintains at 344.5 mA h·g^(-1)after 150 cycles.The improved sodium storage capacity is attributed to the synergistic effect of conductive carbon fibers and SbCo nanoparticles with uniform dispersion,which not only provide excellent electronic conductivity,but also enhance structural stability to reduce volume change.
基金supported by Key Laboratory of Research on Hydraulic and Hydro-Power Equipment Surface Engineering Technology of Zhejiang Province(20240304).
文摘The corrosion behaviors of an as-cast FeCoNiAl_(0.75)Cr_(1.25)high-entropy alloy(HEA)in acidic Na_(2)SO_(4)solution with different pH values were investigated.The results indicate that the as-cast FeCoNiAl_(0.75)Cr_(1.25)HEA is mainly composed of face-centered cubic phase,body-centered cubic(BCC1)phase(Co–Cr–Fe)and ordered BCC(B2)phase(Ni–Al),in which BCC1 phase and B2 phase have a eutectic microstructure.Moreover,the corrosion of B2 phase occurs preferentially in a 0.05 mol/L SO_(4)^(2−)acidic solution.The electrochemical measurement results show that the corrosion resistance of the investigated HEA significantly changes as the solution pH increases from 2 to 2.5.This indicates that there is a critical pH in the range of 2–2.5 that affects the corrosion of HEA.In addition,the results of X-ray photoelectron spectroscopy prove that the surface film of FeCoNiAl_(0.75)Cr_(1.25)in SO_(4)^(2−)solution is formed with Al_(2)O_(3)and Cr_(2)O_(3)as the main components,and The content of Al2O3 and Cr_(2)O_(3)increases with increasing solution pH.
基金the financial support from the Foshan Talents Special Foundation(BKBS202003).
文摘Unstable Zn interface caused by rampant dendrite growth and parasitic side reactions always hinders the practical application of aqueous zinc metal batteries(AZMBs),Herein,tyrosine(Tyr)with high molecular polarity was introduced into aqueous electrolyte to modulate the interfacial electrochemistry of Zn anode.In AZMBs,the positively charged side of Tyr can be well adsorbed on the surface of Zn anode to form a water-poor layer,and the exposed carboxylate side can be easily coordinated with Zn^(2+),favoring inducing uniform plating of Zn^(2+)and inhibiting the occurrence of water-induced side reactions.These in turn enable the achievement of highly stable Zn anode.Accordingly,the Zn anodes achieve outstanding cyclic stability(3000 h at 2 mA cm^(-2),2 mA h cm^(-2)and 1300 h at 5 mA cm^(-2),5 mA h cm^(-2)),high average Coulombic efficiency(99.4%over 3200 cycles),and high depth of discharge(80%for 500 h).Besides,the assembled Zn‖NaV_(3)O_(8)·1.5H_(2)O full cells deliver remarkable capacity retention and ultra-long lifetime(61.8%over 6650 cycles at 5 A g^(-1))and enhanced rate capability(169 mA h g^(-1)at 5 A g^(-1)).The work may promote the design and deep understanding of electrolyte additives with high molecular polarity for high-performance AZMBs.
