On the sand-blasting-treated titanium（Ti） substrate, the boron-doped diamond（BDD） electrodes with a wide potential window were prepared by microwave plasma chemical vapor deposition（MPCVD）. The electrochemi- cal...On the sand-blasting-treated titanium（Ti） substrate, the boron-doped diamond（BDD） electrodes with a wide potential window were prepared by microwave plasma chemical vapor deposition（MPCVD）. The electrochemi- cal oxidation ratios of phenol at BDD/Ti electrodes at elevated temperatures（from 20 ℃ to 80 ℃） were examined by the chemical oxygen demand（COD） of phenol electrolyte during electrolysis. The results show that the COD removal was increased at high temperatures and the optimized temperature for enhancing the electrochemical oxidation ratio of phenol is 60 ℃. The mechanism for the temperature-dependent electrochemical oxidation ratios of phenol at the electrodes was investigated. The study would be favorable for further improving the performance of BDD/Ti elec- trodes, especially working at high temperatures.展开更多
Boron-doped diamond （BDD） film electrodes using Ta as substrates were employed for anodic oxidation of salicylic acid （SA）. The effects of operational variables including initial concentration, current density, te...Boron-doped diamond （BDD） film electrodes using Ta as substrates were employed for anodic oxidation of salicylic acid （SA）. The effects of operational variables including initial concentration, current density, temperature and pH were examined. The results showed that BDD films deposited on the Ta substrates had high electrocatalytic activity for SA degradation. There was little effect ofpH on SA degradation. The current efficiency （CE） ,aas fbund to be dependent mainly on the initial SA concentration, current density and temperature. Chemical oxygen demand （COD） was reduced from 830 mg/L to 42 mg/L under a current density of200A/m^2 at 30℃.展开更多
Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electroch...Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electrochemical cell(R-PCEC)toward the sustainable hydrogen production and utilization.However,enhancement of their activity and stability remains challenging.Herein,we develop the Ta-regulated BaCo_(0.7)Fe_(0.3)O_(3-δ)perovskite oxygen electrode(Ba(Co_(0.7)Fe_(0.3))_(1-x)Ta_xO_(3-δ))with abundant oxygen defects and achieve the simultaneous enhancement in the electrocatalytic activity and stability toward ORR and OER.As-fabricated R-PCEC with(Ba(Co_(0.7)Fe_(0.3))_(0.9)Ta_(0.1)O_(3-δ))(BCFT10)oxygen electrode performs high power density of 1.47 W·cm^(-2)at 650℃in fuel cell mode,and the current density is up to-2.11 A·cm^(-2)at 1.4 V at 650℃in electrolysis mode,as well as the good stability in both the fuel cell and electrolysis modes.Importantly,the cell also demonstrates a stable cycling operation between fuel cell and electrolysis mode,suggesting a great potential of BCFT10 as oxygen electrode material for R-PCECs.展开更多
中试含能材料废水含各类高浓度含氮化合物(氨氮(NH_(3)─N)、亚硝酸盐(NO_(2)^(-))、硝酸盐(NO3-)等)和有机污染物,是一类极难降解的废水。为实现对含能材料废水中含氮化合物的高效、定向去除,采用热丝化学气相沉积(热丝化学气相沉积法(...中试含能材料废水含各类高浓度含氮化合物(氨氮(NH_(3)─N)、亚硝酸盐(NO_(2)^(-))、硝酸盐(NO3-)等)和有机污染物,是一类极难降解的废水。为实现对含能材料废水中含氮化合物的高效、定向去除,采用热丝化学气相沉积(热丝化学气相沉积法(HFCVD))法制备的掺硼金刚石(BDD)电极对其进行电化学降解,重点研究了氯化钠和硫酸钠等电解质成分及浓度、修饰电极类型(如Cu/BDD、Ni/BD电极)及电解装置结构(单池、双池)对含氮化合物降解效果的影响。结果表明:在含能材料废水中添加0.1 M氯化钠电解质有助于提高NH3─N直接转化为氮气(N_(2))的选择性;采用Cu/BDD、Ni/BDD阴极可加速高价氮向NH_(3)─N的转化过程;双电解池结构体系下,以Cu/BDD、Ni/BDD电极为阳极可以提高NH3─N转化为N_(2)的降解速率。因此,采用金属修饰BDD电极为阳极的双电解池结构在添加0.1 M NaCl电解质情况下有望对宏量含能材料废水进行快速、高效、高选择性降解。展开更多
This paper summarizes the production of the platinum electrode of tantalum clad silver. Ta(Ag). It clarifies the determination of the design parameters for the composite electrode, the technological process, the tensi...This paper summarizes the production of the platinum electrode of tantalum clad silver. Ta(Ag). It clarifies the determination of the design parameters for the composite electrode, the technological process, the tensile test of the composite Ta(Ag) wire, the spotwelding of the electrode seal. the examination for leakage of the electrode. the prcess for winding the platinum foil and spotwelding, and the process parameter for obtaining high-quality electrodes during the production of 1,000 and more electrodes. The electrode produced satisfied the needs of the engineering design. It was demonstrated that the electrode had a long life-span and property stability, and fulfilled the norms for saving electricity and increasing production.展开更多
Chemically robust conductive p-type boron-doped diamond （BDD） films are an important electrode material and have been widely applied in electrochemistry. In this study, BDD films are taken as a two-dimensional （2D...Chemically robust conductive p-type boron-doped diamond （BDD） films are an important electrode material and have been widely applied in electrochemistry. In this study, BDD films are taken as a two-dimensional （2D） electrode in a eleetrophoresis tank system instead of the conventional one-dimensional platinum wire electrode. The theoretical simulations by finite element numerical analysis reveal that the 2D BDD electrodes have relatively high intensity and uniformity of electric field in the tank. Experimentally, the 2D BDD electrodes with smaller size show excellent properties for the separation of DNA fragments. The advantages of the 2D BDD electrodes with chemical inertness, sustainability, high intensity and uniformity electronic field, as well as reduced small size of electrophoresis tank would open a possibility for realizing new generation, high-performance biological devices.展开更多
新污染物广泛存在于地表水、地下水及饮用水中,现有饮用水处理工艺对其难以有效去除。为此,研究了家用终端掺硼金刚石薄膜电极装置耦合超声(BDD/US)对水中新污染物的去除性能,以敌草隆、阿特拉津(ATZ)作为目标污染物,以单独BDD电极体系...新污染物广泛存在于地表水、地下水及饮用水中,现有饮用水处理工艺对其难以有效去除。为此,研究了家用终端掺硼金刚石薄膜电极装置耦合超声(BDD/US)对水中新污染物的去除性能,以敌草隆、阿特拉津(ATZ)作为目标污染物,以单独BDD电极体系作为对照,确定了BDD/US体系的最佳工作参数,对比了两种体系对目标污染物和总有机碳(TOC)的去除效果,并分析了降解机理和降解毒性。结果表明,US的加入提高了体系中的活性氧(ROS)水平,BDD/US体系对敌草隆和ATZ的降解率分别提高10.11%和17.94%;即使降低BDD电极体系电流,1.2 A/1.0 A BDD/US体系依旧能够达到1.5 A BDD电极体系对两种目标物的去除效果水平;敌草隆和ATZ在降解过程中急性毒性逐步降低。展开更多
采用微波等离子体技术在CH4-H2-C2H6气体条件下制备了钛基掺硼金刚石薄膜。四点探针法测得薄膜电阻率在零掺杂时为1×1012Ω·cm,当反应气源中B/C上升为5×10-3时电阻率降至5×10-3Ω·cm。扫描电镜显示掺硼金刚石...采用微波等离子体技术在CH4-H2-C2H6气体条件下制备了钛基掺硼金刚石薄膜。四点探针法测得薄膜电阻率在零掺杂时为1×1012Ω·cm,当反应气源中B/C上升为5×10-3时电阻率降至5×10-3Ω·cm。扫描电镜显示掺硼金刚石具有完整晶型和致密结构。拉曼光谱观察到金刚石结构在掺杂前后发生明显改变。采用循环伏安测试了Ti/BDD电极的电化学参量,并与PbO2,Sn-Sb and PbO2-Er三种电极进行阳极氧化对-硝基酚的对比实验。结果表明,在Ti/BDD电极上,对-硝基酚的总有机碳去除率接近100%,远高于其它三种电极。展开更多
基金Supported by the Project of the Development and Reform Commission in Jilin Province,China(No.2009-633)the New Century Excellent Talents in Universities of China(No.NCET-06-0303)the National Natural Science Foundation of China(No.20873051)
文摘On the sand-blasting-treated titanium（Ti） substrate, the boron-doped diamond（BDD） electrodes with a wide potential window were prepared by microwave plasma chemical vapor deposition（MPCVD）. The electrochemi- cal oxidation ratios of phenol at BDD/Ti electrodes at elevated temperatures（from 20 ℃ to 80 ℃） were examined by the chemical oxygen demand（COD） of phenol electrolyte during electrolysis. The results show that the COD removal was increased at high temperatures and the optimized temperature for enhancing the electrochemical oxidation ratio of phenol is 60 ℃. The mechanism for the temperature-dependent electrochemical oxidation ratios of phenol at the electrodes was investigated. The study would be favorable for further improving the performance of BDD/Ti elec- trodes, especially working at high temperatures.
文摘Boron-doped diamond （BDD） film electrodes using Ta as substrates were employed for anodic oxidation of salicylic acid （SA）. The effects of operational variables including initial concentration, current density, temperature and pH were examined. The results showed that BDD films deposited on the Ta substrates had high electrocatalytic activity for SA degradation. There was little effect ofpH on SA degradation. The current efficiency （CE） ,aas fbund to be dependent mainly on the initial SA concentration, current density and temperature. Chemical oxygen demand （COD） was reduced from 830 mg/L to 42 mg/L under a current density of200A/m^2 at 30℃.
基金financially supported by the National Key R&D Program of China(No.2022YFB4002201)the National Natural Science Foundation of China(Nos.52072362 and 52302119)+3 种基金Jilin Province Science and Technology Development Plan Funding Project(Nos.SKL202302039 and 20220201112GX)Jiangsu Province Innovation Support Program(No.BE2023092-2)Youth Innovation Promotion Association CAS(No.2021223)Open Funds of the State Key Laboratory of Rare Earth Resource Utilization(No.RERU2022008)。
文摘Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electrochemical cell(R-PCEC)toward the sustainable hydrogen production and utilization.However,enhancement of their activity and stability remains challenging.Herein,we develop the Ta-regulated BaCo_(0.7)Fe_(0.3)O_(3-δ)perovskite oxygen electrode(Ba(Co_(0.7)Fe_(0.3))_(1-x)Ta_xO_(3-δ))with abundant oxygen defects and achieve the simultaneous enhancement in the electrocatalytic activity and stability toward ORR and OER.As-fabricated R-PCEC with(Ba(Co_(0.7)Fe_(0.3))_(0.9)Ta_(0.1)O_(3-δ))(BCFT10)oxygen electrode performs high power density of 1.47 W·cm^(-2)at 650℃in fuel cell mode,and the current density is up to-2.11 A·cm^(-2)at 1.4 V at 650℃in electrolysis mode,as well as the good stability in both the fuel cell and electrolysis modes.Importantly,the cell also demonstrates a stable cycling operation between fuel cell and electrolysis mode,suggesting a great potential of BCFT10 as oxygen electrode material for R-PCECs.
文摘中试含能材料废水含各类高浓度含氮化合物(氨氮(NH_(3)─N)、亚硝酸盐(NO_(2)^(-))、硝酸盐(NO3-)等)和有机污染物,是一类极难降解的废水。为实现对含能材料废水中含氮化合物的高效、定向去除,采用热丝化学气相沉积(热丝化学气相沉积法(HFCVD))法制备的掺硼金刚石(BDD)电极对其进行电化学降解,重点研究了氯化钠和硫酸钠等电解质成分及浓度、修饰电极类型(如Cu/BDD、Ni/BD电极)及电解装置结构(单池、双池)对含氮化合物降解效果的影响。结果表明:在含能材料废水中添加0.1 M氯化钠电解质有助于提高NH3─N直接转化为氮气(N_(2))的选择性;采用Cu/BDD、Ni/BDD阴极可加速高价氮向NH_(3)─N的转化过程;双电解池结构体系下,以Cu/BDD、Ni/BDD电极为阳极可以提高NH3─N转化为N_(2)的降解速率。因此,采用金属修饰BDD电极为阳极的双电解池结构在添加0.1 M NaCl电解质情况下有望对宏量含能材料废水进行快速、高效、高选择性降解。
文摘This paper summarizes the production of the platinum electrode of tantalum clad silver. Ta(Ag). It clarifies the determination of the design parameters for the composite electrode, the technological process, the tensile test of the composite Ta(Ag) wire, the spotwelding of the electrode seal. the examination for leakage of the electrode. the prcess for winding the platinum foil and spotwelding, and the process parameter for obtaining high-quality electrodes during the production of 1,000 and more electrodes. The electrode produced satisfied the needs of the engineering design. It was demonstrated that the electrode had a long life-span and property stability, and fulfilled the norms for saving electricity and increasing production.
基金Supported by the National Natural Science Foundation of China under Grant No 51472105the Key Program in Science and Technology of Jilin Province under Grant No 20150204062GX
文摘Chemically robust conductive p-type boron-doped diamond （BDD） films are an important electrode material and have been widely applied in electrochemistry. In this study, BDD films are taken as a two-dimensional （2D） electrode in a eleetrophoresis tank system instead of the conventional one-dimensional platinum wire electrode. The theoretical simulations by finite element numerical analysis reveal that the 2D BDD electrodes have relatively high intensity and uniformity of electric field in the tank. Experimentally, the 2D BDD electrodes with smaller size show excellent properties for the separation of DNA fragments. The advantages of the 2D BDD electrodes with chemical inertness, sustainability, high intensity and uniformity electronic field, as well as reduced small size of electrophoresis tank would open a possibility for realizing new generation, high-performance biological devices.
文摘新污染物广泛存在于地表水、地下水及饮用水中,现有饮用水处理工艺对其难以有效去除。为此,研究了家用终端掺硼金刚石薄膜电极装置耦合超声(BDD/US)对水中新污染物的去除性能,以敌草隆、阿特拉津(ATZ)作为目标污染物,以单独BDD电极体系作为对照,确定了BDD/US体系的最佳工作参数,对比了两种体系对目标污染物和总有机碳(TOC)的去除效果,并分析了降解机理和降解毒性。结果表明,US的加入提高了体系中的活性氧(ROS)水平,BDD/US体系对敌草隆和ATZ的降解率分别提高10.11%和17.94%;即使降低BDD电极体系电流,1.2 A/1.0 A BDD/US体系依旧能够达到1.5 A BDD电极体系对两种目标物的去除效果水平;敌草隆和ATZ在降解过程中急性毒性逐步降低。
文摘采用微波等离子体技术在CH4-H2-C2H6气体条件下制备了钛基掺硼金刚石薄膜。四点探针法测得薄膜电阻率在零掺杂时为1×1012Ω·cm,当反应气源中B/C上升为5×10-3时电阻率降至5×10-3Ω·cm。扫描电镜显示掺硼金刚石具有完整晶型和致密结构。拉曼光谱观察到金刚石结构在掺杂前后发生明显改变。采用循环伏安测试了Ti/BDD电极的电化学参量,并与PbO2,Sn-Sb and PbO2-Er三种电极进行阳极氧化对-硝基酚的对比实验。结果表明,在Ti/BDD电极上,对-硝基酚的总有机碳去除率接近100%,远高于其它三种电极。
