To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal ...To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal catalysts.Here,a cobalt(Co)carbonate hydroxide@amorphous Co-metal-organic frame-work(CoCH@Co-MOF)core-shell nanowire is grown on carbon fiber paper using a wet-chemistry method for the HER in alkaline electrolyte.The CoCH@Co-MOF exhibits small overpotential,small Tafel slope,and large exchange current density in the HER because of its large electrochemical reaction sur-faces.In addition,one-dimensional morphology is beneficial to charge conduction,and the amorphous MOF framework endows CoCH@Co-MOF with efficient catalytic activities.The CoCH@Co-MOF nanowire is therefore promising in the HER because of its low cost,high efficiency,excellent stability,and easy operation.展开更多
To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalina...To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalination battery was designed,which employed NiCuHCF as the sodium-ion(Na^(+))intercalation cathode,Pb as the chloride-ion(Cl^(-))storage anode and 0.6 mol L^(-1) NaCl as the aqueous electrolyte.The electrochemical mechanism encompassed the processes of sodium ion(Na^(+))insertion and extraction at the cathode and the reversible transformation of lead(Pb)to lead chloride(PbCl_(2))at the anode.This unique system demonstrated exceptional electrochemical performance,including a high cycling stability(93.9%capacity retention at 1 C after 150 cycles),superior rate capability,and a high operating voltage(0.9 V).This research provides valuable insights into the large-scale commercialization potential of advanced aqueous dual-ion batteries.展开更多
基金Z.Huang thanks the National Natural Science Foundation of China(51772214)the National Youth Talent Support Program(W03070073)for support+4 种基金C.Zhang thanks the National Natural Science Foundation of China(51432006)the Ministry of Science and Technology of China(2011DFG52970)the Ministry of Education of China(IRT14R23)the 111 Project(B13025)the Innovation Program of Shanghai Municipal Education Commission for support.
文摘To solve the problem of hydrogen utilization in water splitting,it is necessary to develop earth-abundant,productive,and stable electrocatalysts for the hydrogen evolution reaction(HER)instead of platinum-based metal catalysts.Here,a cobalt(Co)carbonate hydroxide@amorphous Co-metal-organic frame-work(CoCH@Co-MOF)core-shell nanowire is grown on carbon fiber paper using a wet-chemistry method for the HER in alkaline electrolyte.The CoCH@Co-MOF exhibits small overpotential,small Tafel slope,and large exchange current density in the HER because of its large electrochemical reaction sur-faces.In addition,one-dimensional morphology is beneficial to charge conduction,and the amorphous MOF framework endows CoCH@Co-MOF with efficient catalytic activities.The CoCH@Co-MOF nanowire is therefore promising in the HER because of its low cost,high efficiency,excellent stability,and easy operation.
基金supported by the Ningbo Natural Science Foundation(2022J064 and 2023J099)NSAF joint Fund(U2330205 and U1830106).
文摘To tackle the challenges associated with energy storage,dual-ion batteries have emerged as one of the most promising battery systems owing to their affordability and high energy density.In this work,a dualion desalination battery was designed,which employed NiCuHCF as the sodium-ion(Na^(+))intercalation cathode,Pb as the chloride-ion(Cl^(-))storage anode and 0.6 mol L^(-1) NaCl as the aqueous electrolyte.The electrochemical mechanism encompassed the processes of sodium ion(Na^(+))insertion and extraction at the cathode and the reversible transformation of lead(Pb)to lead chloride(PbCl_(2))at the anode.This unique system demonstrated exceptional electrochemical performance,including a high cycling stability(93.9%capacity retention at 1 C after 150 cycles),superior rate capability,and a high operating voltage(0.9 V).This research provides valuable insights into the large-scale commercialization potential of advanced aqueous dual-ion batteries.
