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Chinese Chemical Society | Xiamen University

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Full-Text Articles in Physical Sciences and Mathematics

Corrosion Behaviour Of Copper Covered With Ion Selective Phenolic Coatings By Eis, Zhoucheng Wang, Yingzhou Zhang, Shaomin Zhou Aug 1997

Corrosion Behaviour Of Copper Covered With Ion Selective Phenolic Coatings By Eis, Zhoucheng Wang, Yingzhou Zhang, Shaomin Zhou

Journal of Electrochemistry

Electrochemical impedance spectroscopy(EIS) technique was employed to study the corrosion behaviour of copper painted with the anion selective、 cation selective and bipolar phenolic coatings in 3% NaCl solution. From the impedance spectrum characteristics, the models of equivalent circuit for these different coating systems were established,and the methods for the analysis of experimental impedance diagrams in terms of coating and interface properties were discussed. The research results show that the composition and structure of ion selective coatings have significant influence on corrosion behaviour of copper. The bipolar coating consisting of an anion selective inner layer and a cation selective outer layer …

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Rechargeability Of Zn Mno 2 In Non Aqueous Electrolyte, Baoqi Li, Hanxi Yan, Mifang Du, Xingping Ai Aug 1997

Rechargeability Of Zn Mno 2 In Non Aqueous Electrolyte, Baoqi Li, Hanxi Yan, Mifang Du, Xingping Ai

Journal of Electrochemistry

A novel Zn MnO 2 battery ststem by use of spinel related MnO 2 as positive electrode and Zn(ClO 4) 2 in propyl carbonate as electrolyte was constructed and its charge discharge behaviour was studied. The results show that the cell reaction of the system proceeds through the electrochemical intercalation of zinc into the crystalline lattice of MnO 2 to form Zn x Mn 2O 4 . At x≤0.5 , Zn x Mn 2O 4 remains its spinel structure stable and exhibits high reversibility for zinc intercalation. As a result, the battery system demonstrates excellent cycleability (>200 cycles), higher …

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Electrocatalytic Oxidation Of Methanol On The Stearate Nickel L B Film, Benzeng Hua, Wenyan Hu, Yanzhen Chen Aug 1997

Electrocatalytic Oxidation Of Methanol On The Stearate Nickel L B Film, Benzeng Hua, Wenyan Hu, Yanzhen Chen

Journal of Electrochemistry

The stearate nickel L B films is good electroacatlyst for the oxidation of methanol MeOH in alkaline. The electrochemical behaviors of stearate nickel L B films is affected by the concentration of KOH. The rate of quantity of mickel ion and stearic acid in L B films is 1∶1, which means that the nickel ion may exist in -COONi(OH) form. The electrocatalytic process is influenced by the concentration of OH - , it involves the penetration of MeOH into the films. The oxidative currents of MeOH are linearly dependent on the bulk concentration.

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Surface Modifications Of Carbon Materials Used As Anode Of Lithium Ion Battery Ⅲ. Improvement Of Artificially Imposed Solid Electrolyte Film On Cell Performance, Shuhua Ma, Xiabin Jing, Fosong Wang Aug 1997

Surface Modifications Of Carbon Materials Used As Anode Of Lithium Ion Battery Ⅲ. Improvement Of Artificially Imposed Solid Electrolyte Film On Cell Performance, Shuhua Ma, Xiabin Jing, Fosong Wang

Journal of Electrochemistry

The improving effect of solid electrolyte film artificially imposed on carbon electrode was investigated. The result showed that both the charge/discharge capacity and first charge/discharge efficiency, to a certain extent, were enhanced, and the result also suggested the effectiveness of the substitution of the artificially imposed solid electrolyte film for the inherent passivating film which was formed on the surface of the carbon electrode while inserted in the electrolyte during charging or discharging. The Scanning Electron Microscope result displayed the compact and well defined morphology of the artificially imposed crystalline film.

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Preparation And Examination Of Planar Type Solid Oxide Fuel Cells, Yi Jiang, Jingwang Yan, Shizhong Wang, Chunying Yu, Wenzhao Li Aug 1997

Preparation And Examination Of Planar Type Solid Oxide Fuel Cells, Yi Jiang, Jingwang Yan, Shizhong Wang, Chunying Yu, Wenzhao Li

Journal of Electrochemistry

The solid oxide fuel cells of planar type(SOFC) have been developed after successfully preparing La 0.8 Sr 0.2 MnO 3 cathodes and Ni YSZ ceramic anodes on YSZ plates and solving the high temperature sealing technical problem. Examination of the single cells fabricated showed that the maximum power output at 950 ℃ for H 2 as fuel and air as oxidant reached 0.12 W/cm 2. It was found that the large polarization overpotential of the Ni YSZ anode and the Ohmic losses of the cells were two main factors responsible for the relative low output power density.

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The Electrochemical Behavior And Deposited Mechanism Of Zn Ni Alloy Codeposition, Jixun Wu, Yongqin Liu, Huimin Meng Aug 1997

The Electrochemical Behavior And Deposited Mechanism Of Zn Ni Alloy Codeposition, Jixun Wu, Yongqin Liu, Huimin Meng

Journal of Electrochemistry

The electrochemical behavior of Zn Ni alloy codeposition and concomitant hydrogen evolution have been studied in the chloride ammonia solution through the d c electroplating method. Under the condition of the applied cathodic current density of 2A/dm 2 , the AC impedance spectra have been measured. An equivalent circuit has been presented for the impedance study on the alloy codeposition.

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The Electrode Process Of Some Organic Dyes Studied By Spectroelec Tro Chemical Technique In Situ, Yinxuan Tang, Hangsheng Yang, Baoen Shen Aug 1997

The Electrode Process Of Some Organic Dyes Studied By Spectroelec Tro Chemical Technique In Situ, Yinxuan Tang, Hangsheng Yang, Baoen Shen

Journal of Electrochemistry

Spectroelectrochemistry especially with in situ measurement in a cell provides a very useful mthodology for measuring the parameters of electrode process. In this paper, we report the determination of formal potentials, the number of electron transfer, the diffusion coefficient, the heterogeneous electron transfer rate constant and the transfer coefficient of some organic dyes (Methyelene blue, Neutral red, Indigo carmine) using spectroelectro chemical technique in situ.

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Determination Of Theine And Theinein Aminophylline By Oscillographic Titration, Zhaoren Meng, Yongfu Zhan Aug 1997

Determination Of Theine And Theinein Aminophylline By Oscillographic Titration, Zhaoren Meng, Yongfu Zhan

Journal of Electrochemistry

In this paper, a method is described for the determination of theine and theine in aminophglline by oscillographic titration. The theine or theine in amimophylline and AgNO 3 can make precipitation quantitatively. The quantitative and excess AgNO 3 is added in it, when reaction has been completed, the residual AgNO 3 can be carred out directly by oscillographic titrimetry with DDTC as titrant. Trace DDTC can make a slot on oscillogram of mercury membrane and silver electrodes. Using DDTC standard solution to titrate, that is the slot appearing. It can be used to indicate end point sensitively. The characteristics of …

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Study On The Diffusion Of Electroactive Molecules In Polymer Electrolyte By Microelectrode Voltammetry, Liming Ding, Shaojun Dong, Erkang Wang Aug 1997

Study On The Diffusion Of Electroactive Molecules In Polymer Electrolyte By Microelectrode Voltammetry, Liming Ding, Shaojun Dong, Erkang Wang

Journal of Electrochemistry

The ten years study on the diffusion of electroactive molecules in polymer electrolyte by microelectrode voltammetry was reviewed by considering the development background of polymer electrolyte materials. The classification, fabrication, applications and electrochemical measurements of microelectrode were introduced concisely. The several important factors influencing the diffusion of electroactive molecules were stressed. In the final part of this paper, some new reports on the diffusion of labeled molecules were introduced. 52 references were quoted.

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Study Of Co(2.5 Nm)/Pt(2.5 Nm) N(N ≥50) Multilayer By Electrocrystallization, Renhe Yin, Weiming Cao, Yanpin Guo, Huifen Ji Aug 1997

Study Of Co(2.5 Nm)/Pt(2.5 Nm) N(N ≥50) Multilayer By Electrocrystallization, Renhe Yin, Weiming Cao, Yanpin Guo, Huifen Ji

Journal of Electrochemistry

The electrocrystallization of Co(2.5 nm)/Pt(2.5 nm) n (n ≥50) multilayer has been carried out under potential control, based on observation of reflection electron microscopy (REM). Monatomic steps on Pt single crystal surfaces have been imaged using a conventional transmission electron microscope in the reflection made. The REM images have revealed three dimintional growth of Co electrocrystallization at high polarization of -1.15 V (vs.Hg/Hg 2SO 4). The structure of the specimen was examined by small or high angle X ray diffration technique. The modulation period of a multilayered structure is 5.0 nm.

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Preparation Of Pbo 2/Ti Plate Electrode, Zhigang Shao, Baolian Yi, Xinge Zhang, Enjun Zhang Aug 1997

Preparation Of Pbo 2/Ti Plate Electrode, Zhigang Shao, Baolian Yi, Xinge Zhang, Enjun Zhang

Journal of Electrochemistry

The perchlorate was made up of a lead dioxide plate elcetrode and an oxygen cathode. By measuring the flow capacity of cell gas in the cell, and by means of CV、SEM、XRD, the performances of the lead dioxide plate electrodes are evaluated. The influence of changes in the concentrations of electroplating solutions (F 、HNO 3、Bi 3+ 、Ni 2+ 、Fe 3+ and surface active agent) is investigated. The results show that the concentrations of Fe 3+ in the solutions must be lower 0.01 g/l, and the concentrations of HNO 3 in the solutions are about 20 g/l, in order to get better …

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Behavior Of Copper In Hydrogen Storage Alloy Microencapsulated By Copper, Dawei Zhang, Huatang Yuan, Huabin Yang, Zuoxiang Zhou, Yunshi Zhang Aug 1997

Behavior Of Copper In Hydrogen Storage Alloy Microencapsulated By Copper, Dawei Zhang, Huatang Yuan, Huabin Yang, Zuoxiang Zhou, Yunshi Zhang

Journal of Electrochemistry

Negative electrode made from Cu microencapsulated hydrogen storage alloy was studied by using cyclic voltammetry method. The results showed that copper as a coating material was of a certain stability in 5 mol/L KOH solution within the range of charge and discharge voltage. But when expanding the sweep voltage, the CV curve showed a pair of distinct oxidation reduction current peaks of Cu 2O formation at E =-0.3 V and Cu 2O reduction at E =-0.6 V. With charging discharging cycles, copper is liable to be oxidized to Cu 2O and further oxidized into CuO 2- 2. When charged again, …

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Electrorheological Characters Of Polyaniline Suspensions, Guangyao Su, Deshu Gao, Changqing Zhang Aug 1997

Electrorheological Characters Of Polyaniline Suspensions, Guangyao Su, Deshu Gao, Changqing Zhang

Journal of Electrochemistry

Polyaniline (PAn) as the dispersive particles and insulating oil as the dispersive medium, the electrorheological fluid (ERF) is constituted. Relations between the factors of electric field strength ( E ), temperature ( T ) and the static yield stress ( τ S ), current density ( i ) of ERF are investigated. The results show that the changes of τ S and i with electric field intensity have emerged in the exponential relation, i.e, τ S∝E 0.7 , i∝E 2.18 . Otherwise, when exert a constant voltage on ERF, owing to the polarization, the absorption of medium of ERF have …

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Studies On The Failure Modes Of Stationary Vrla Batteries, Yibo Tong, Xiangming Qiu Aug 1997

Studies On The Failure Modes Of Stationary Vrla Batteries, Yibo Tong, Xiangming Qiu

Journal of Electrochemistry

In order to improve the reliability and the quality of stationary valve regulated lead acid (VRLA) batteries, the failure modes of the stationary VRLA batteries which caused by the water loss and the thermal runaway are studied. The water loss may be solved by increasing the Oxygen recombination efficiency, choosing the suitable grid material and the additives of megative paste, decreasing the corrosion of the positive plates. The thermal runaway may be solved by decreasing the inner ohmic resistance of VRLA batteries, improving the outside condition of batteries such as putting into the absorbing heat material between the abtteries etc..

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Study On Electrochemical Reactions Of K 4 Fe(Cn) 6 /K 3 Fe(Cn) 6 With Graze Ellipsometry, Shengtao Zhang, Changyuan Tao, Nianbing Li, Zongqing Huang, Chushao Xu Aug 1997

Study On Electrochemical Reactions Of K 4 Fe(Cn) 6 /K 3 Fe(Cn) 6 With Graze Ellipsometry, Shengtao Zhang, Changyuan Tao, Nianbing Li, Zongqing Huang, Chushao Xu

Journal of Electrochemistry

A measurement technology of ellipsometry called graze was put forward. Electrochemical reactions of K 4 Fe(CN) 6 /K 3 Fe(CN) 6 on glass electrode deposited indium oxide were studied with both the graze ellipsometry and cycilic voltammetry. The results indicated that ellipsometric parameter and its change during the electrochemical reactions could be confirmed with graze ellipsometry, and the regularity was corresponding to the process of electrochemical reaction. So study for electrode system could be processed with the graze ellipsometry. The graze ellipsometry could also be applied to analyze properties of diffusion layer and prosthesis limitations of other technologies.

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Study On Electrochemical Methods Of Controlled Convolution ——A Simple Electron Transfer Reaction Followed By A Homogeneous Catalytic Reaction(Ⅰ), Ming Ma, Naixian Xie, Qianlei Gao, Yue Zeng Aug 1997

Study On Electrochemical Methods Of Controlled Convolution ——A Simple Electron Transfer Reaction Followed By A Homogeneous Catalytic Reaction(Ⅰ), Ming Ma, Naixian Xie, Qianlei Gao, Yue Zeng

Journal of Electrochemistry

A simple electron transfer reaction followed by a homogeneous catalytic reaction is studied in this paper by three kinds of controlled convolution electrochemical experimental methods, which are the constant semi integral (CSI), linear semi integral sweep (LSIS) and linear semi differential sweep (LSDS). According to the three methods, the following equations can be obtained: CSI: πmΨ iI 1(τ)-1=ξe θ LSIS: π2bI 2(τ)-1=ξe θ LSDS: 3π8dI 3(τ)-1=ξe θ Where mΨ i=m i/nFAD 1/2 oC * o, b=D 1/2 ov/nFAk 02 C * o, d=cD 3/2 o/nFAk 04 C * o, m i, v and c are constant value of semi integral, …

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Investigation On Electro Reduction Behaviour Of Copper Anodic Products In Concentrated Naoh Solutions Ⅱ. Electro Reduction Of Cu(Ⅱ) Products, Jianbo He, Hanhe Chen, Jianxin Lin Aug 1997

Investigation On Electro Reduction Behaviour Of Copper Anodic Products In Concentrated Naoh Solutions Ⅱ. Electro Reduction Of Cu(Ⅱ) Products, Jianbo He, Hanhe Chen, Jianxin Lin

Journal of Electrochemistry

Potentiostatic oxidation potentiodynamic or galvanostatic reduction methods have been used to study the cathodic reduction behaviour of various products anodically formed on the second stage of copper oxidation in concentrated NaOH solutions. Seven cathodic current peaks and the corresponding cathodic potential plateaus are observed on the potentiodynamic E/i curves and the galvanostatic E/t curves, respectively. In the negative potential scan, there are three couples of voltammetric peaks which have been attributed to the formation and reduction of CuO, Cu(OH) 2 and Cu(Ⅱ) ion, respectively. The complicated mechanism for the electro formation of the three Cu(Ⅱ) species are discussed.

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Effects Of Tunneling Electrons And Local Field On Nanometer Region Solid / Liquid Interfacial Reactions ——Potential Controlled Stm Induced Nanoscale Modification Of H Terminated Si(111) Surfaces, Zhaoxiong Cai Xiongwei Xie, Caihui Shi, Bingwei Mao, Zhaowu Tian May 1997

Effects Of Tunneling Electrons And Local Field On Nanometer Region Solid / Liquid Interfacial Reactions ——Potential Controlled Stm Induced Nanoscale Modification Of H Terminated Si(111) Surfaces, Zhaoxiong Cai Xiongwei Xie, Caihui Shi, Bingwei Mao, Zhaowu Tian

Journal of Electrochemistry

H terminated n Si(111) surface was found to be etched in 0.5% HF solution in nanometer scale while scanning the STM tip when the substrate potential was somehow lower than the open circuit potential at tunneling condition of V b=+1.0 V (tip positive), I t=1 nA. Much more stable Si surface was achievable at potentials much more negative than the open circuit potential (such as 500 mV negative to OCP) under the same tunneling condition. Furthermore, the etching rete at less negative potential was found to be somehow related to the tunneling current. These results indicate that the STM induced …

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Mechanism And Texture Of Ni Mo Alloy Electrodeposition, Ling Huang, Shukai Xu, Jaoning Tang, Fangzu Yang, Shaomin Zhou May 1997

Mechanism And Texture Of Ni Mo Alloy Electrodeposition, Ling Huang, Shukai Xu, Jaoning Tang, Fangzu Yang, Shaomin Zhou

Journal of Electrochemistry

Ni Mo alloy deposits with (111) preferred orientation was obtained in a solution of 0.22 mol/L NiSO 4·6H 2O, 0.06 mol/L Na 2MoO 4·2H 2O and 0.3 mol/L Na 3C 6H 5O 7·2H 2O in temperature from 25℃ to 50℃,and current densities ranged from 10 mA·cm -2 to 30 mA·cm -2 . The electrodeposition of Ni Mo alloy was studied by cylic voltammetry and potential step experiment. It was shown that Ni Mo alloy is formed by mechanism involving progressive nucleation followed by three dimensional growth of the metal centres. The complex plane impedance plots indicate codeposition of Ni Mo …

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Electroluminescence Of Photoelectrochemically Etched N + Si, Guozheng Li, Chengqian Zhang, Xiumei Yang May 1997

Electroluminescence Of Photoelectrochemically Etched N + Si, Guozheng Li, Chengqian Zhang, Xiumei Yang

Journal of Electrochemistry

Porous silicon with micrometer size pores, which is made on n + Si by photoelectrochemically etched, has electroluminescent property. Each monochromic intensity and wavelength range of luminescent spectra depend on polarized potential. The intersity and the stability of cathodic electroluminescence is high than those of anodic one. Voltammetric behavior before quenching indicated that the electrochemical reactions of some surface species are involved in except the reduction of S 2O 2- 8, which leads to radiative recombination. The energy band diagram based on n + Si (E g=1.1 eV)/PS(E g=1.8 eV) junction is proposed.

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Study On The Preparation, Properties And Applications Of The Polymer/Graphite Composite Electrode, Guohua Chen, Jinrui Xu May 1997

Study On The Preparation, Properties And Applications Of The Polymer/Graphite Composite Electrode, Guohua Chen, Jinrui Xu

Journal of Electrochemistry

The graphite AS composite electrodes, which show high electric conductivity, high mechanical strength and operationl stability, were prepared by filling and extruding the AS copolymer with graphite powder. It exhibited a substantial hydrogen overvoltage and small residual current in different electrolytes, as compared with glassy carbon electrode. The electrode was applied to the determination of traces of Pb 2+ in mineral water, Ag + in waste water and In 3+ , Cu 2+ , Pb 2+ , Cd 2+ in zinc ore, and showed high stability, reproducibility and selectivity. Owing to the existence of abundant polar functioal groups on the …

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The Influence Of Dextran And Its Anion Derivates On The Electrofusion Of Barley Protoplasts, Wang Wei, Jiang Zhiyu May 1997

The Influence Of Dextran And Its Anion Derivates On The Electrofusion Of Barley Protoplasts, Wang Wei, Jiang Zhiyu

Journal of Electrochemistry

The influence of dextran and its anion derivates (blue dextran, cibacron blue dexran, fluoresceinythiocarbamoyl dextran) on the electrofusion of barley protoplasts has been investigated. It was found that as a kind of neutral surface active agent, dextran could promote the electrofusion, but these anion derivates could decrease the electrofusion yield. The phenomena were discussed from the view of adsorption of additives on the cell membrane.

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Study On Polarographic And Voltammetric Behaviour Of Cu(Ⅱ) Xanthosine Complex, Huizhi Fan, Jinlong Liu, Jinghao Pan May 1997

Study On Polarographic And Voltammetric Behaviour Of Cu(Ⅱ) Xanthosine Complex, Huizhi Fan, Jinlong Liu, Jinghao Pan

Journal of Electrochemistry

The polarographic and voltammetric behaviour of Cu(Ⅱ) xanthosine complex has been studied. A new sharp reduction peak is yielded at the potential of -0.14 V(vs, Ag/AgCl). The conc. of Cu(Ⅱ) is proportional to peak current of NPP in the range of 1×10 -6 ～1×10 -4 mol/L when the conc. of xanthosine is 1×10 -4 mol/L. It is indicated that the current has adsorption character. The mechanism of the electrode reaction was deduced and the ratio of the complex is Cu(Ⅱ) ∶ xanthosine=1∶1.

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Studies Of Electrocatalytic Properties Of Electrode Of Dispersed Pt On Gc Support In Ethylene Glycol Oxidation, Shengpei Chen, Shigang Lu Guoqiang Sun, Zhiyou Zhou, Shuanjing Hong May 1997

Studies Of Electrocatalytic Properties Of Electrode Of Dispersed Pt On Gc Support In Ethylene Glycol Oxidation, Shengpei Chen, Shigang Lu Guoqiang Sun, Zhiyou Zhou, Shuanjing Hong

Journal of Electrochemistry

The structures and properties of electrocatalyst of dispersed Plutinum(Pt) on glassy carbon(GC) support under different conditions were studied using cyclic voltammetry,potential step technique,x ray diffraction(XRD) and scanning Electron microscopy(SEM). The results indicated that after having been treated in high temperature,the dispersed Pt on GC support was recrystallised with preferented orientation,and the grain of Pt microcrystal become large and regular.It was illustrated that the dispersed Pt on GC support after high temperature treatment exhibited better stability and high activity for ethylene glycol oxidation.

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Study Of Electrodepositing Bright Tin Cobalt Zinc Alloy From Weak Acid Solution, Zhengzhong Zuo, Runxiang Hou, Shaochun Xia May 1997

Study Of Electrodepositing Bright Tin Cobalt Zinc Alloy From Weak Acid Solution, Zhengzhong Zuo, Runxiang Hou, Shaochun Xia

Journal of Electrochemistry

A new process of electrodeposting bright Tin Cobalt Zinc alloy from weak acid solution is proposed in this paper. The solution compositions and operating conditions are Na 3C 6H 5O 7·2H 2O 100～150,Na 2EDTA·2H 2O 20～30,SnCl 2·2H 2O 15～20,CoSO 4·7H 2O 25～35,ZnCl 2 15～20 g·L -1 ;stabilizer WDZ 1 60～100, brightener WDZ 2 15～20 mL·L -1 ; pH=4～6, D K = 0.5～5.0 A·dm -2 , T= 5～35 ℃. A bright Sn Co Zn deposit having Co about 0.5～3.5% and Zn about 1～10% is produced. The effects of bath compositions on Co or Zn content in deposit is also discussed.

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A Novel Focusing Electrophoresis Techenique Based On The Mobility Differences, Dongyung Chen, Huashui Lin, Yongliang Zhou, Bingwei Mao, Zhaoxiong Xie, Xiangdong Zhuo, Zhaowu Tian May 1997

A Novel Focusing Electrophoresis Techenique Based On The Mobility Differences, Dongyung Chen, Huashui Lin, Yongliang Zhou, Bingwei Mao, Zhaoxiong Xie, Xiangdong Zhuo, Zhaowu Tian

Journal of Electrochemistry

In this report, we present a novel analytical focusing electrophoresis technique. The principle of the technique is based on the mobility differences and has been proved successfully in our laboratory. The technique is of the same applicability as that of CZE, not limited to the protein like big molecules, with greatly improved efficiency of separation and enrichment. Advantages of this novel technique are:1. Since large volume of dilute sample solution can be injected and very narrow and concentrated zones can be obtained, extremely dilute sample can be analyzed by this novel technique in comparison with CZE. 2. Instead of with …

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Effects Of Curvature On The Electrochemical Behaviors Of Tubular Electrode, Yirong Wu, Zhenghao Wang May 1997

Effects Of Curvature On The Electrochemical Behaviors Of Tubular Electrode, Yirong Wu, Zhenghao Wang

Journal of Electrochemistry

The convective diffusion equation of tubular electrode was solved with the implicit finite difference numerical method. Comparing with the electrochemical behaviors of channel electrode, the behaviors of tubular electrode were analysised. The effects of curvature on the electrochemical behaviors of tubular electrode and the limit of applying Levich approximation to tubular electrode were discussed.

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Electrodeposition Of Amorphous Fe Cr Alloy Coating, Danhong Cheng, Weiyi Xu, Yiqin Qin, Liqun Hua, Zhongyan Zhang May 1997

Electrodeposition Of Amorphous Fe Cr Alloy Coating, Danhong Cheng, Weiyi Xu, Yiqin Qin, Liqun Hua, Zhongyan Zhang

Journal of Electrochemistry

The amorphous Fe Cr alloy coatings were obtained by controlling the composition of bath operation conditions. It was found that the pH value, the current density and the content of chromium in Fe Cr alloy coatings effect the amorphous structure of the coatings. The result of anodic polarization shows that the corrosion resistance of the amorphous coatings in acidic media is higher than the corrosion resistance of the crystal ones.

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Electrochemical Behavior Of Superoxide Dismutase On Gold Minigrid With Thin Layer Cell, Xiaqin Wu, Qian Liu, Bin Xu, Xiaoyun Men, Zongrang Zhang May 1997

Electrochemical Behavior Of Superoxide Dismutase On Gold Minigrid With Thin Layer Cell, Xiaqin Wu, Qian Liu, Bin Xu, Xiaoyun Men, Zongrang Zhang

Journal of Electrochemistry

The electrochemical behavior of superoxide dismutase (Cu, Zn SOD) was investigated on gold wire electrode and gold minigrid with thin layer cell by cyclic voltammetry. A quasi reversible redox wave of SOD has obtained on gold minigrid thin layer electrode, but only oxidation peak has observed on gold wire electrode. The electrochemical reaction parameters, such as the formal potential E 0 ′, diffusion coefficient D and standard rate constant k 0′ were estimated.

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Surface Modification Of Molten Carbonate Fuel Cell Anode, Baizeng Fang, Xinyu Liu, Xindong Wang, Shuzhen Duan May 1997

Surface Modification Of Molten Carbonate Fuel Cell Anode, Baizeng Fang, Xinyu Liu, Xindong Wang, Shuzhen Duan

Journal of Electrochemistry

In this study, the anode material of molten carbonate fuel cell was modified by the deposition of niobium on nickel surface. The results of polarization experiments reveal that the corrosion resistant properties as well as electrocatalytic activity have been improved greatly.

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