文献类型：期刊文献

中文题名：碱性介质中铜镍合金及铜电极的光电化学研究

英文题名：A PHOTOELECTROCHEMICAL STUDY OF CUPRO-NICKEL AND COPPER ELECTRODES IN ALKALINE SOLUTIONS

作者：周国定[1];徐群杰[2];KamkinA[3]

机构：[1]上海电力学院电化学研究室,上海200090;[2]华东理工大学防腐蚀中心,上海200237;[3]俄罗斯莫斯科大学

年份：1998

卷号：18

期号：2

起止页码：151

中文期刊名：中国腐蚀与防护学报

外文期刊名：Journal of Chinese Society For Corrosion and Protection

收录：CSTPCD;;Scopus;CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目;上海市高等学校青年科学基金资助项目

语种：中文

中文关键词：铜镍合金;腐蚀;光电化学;碱性介质

外文关键词：Copper, Cu-Ni alloy, Corrosion, Photoelectrochemistry

摘要：用动电位伏安法和光电化学方法对铜镍合金(7％Ni+93％Cu)和铜电极在碱性介质中的电化学行为进行了研究。铜镍合金电极的阳极氧化膜呈p型光电响应,光电响应来自电极表面的Cu_2O膜,其厚度大于纯铜电极的Cu_2O膜。铜电极在碱性Na_2SO_4溶液中电位正向扫描时的光响应呈p型,点蚀电位以后光响应从p型转为n型。
The electrochemical behavior of both 7%Ni-93%Cu alloy electrode and pure Cu electrode in alkaline solutions was studied by cyclic voltammetry and photocurrent response method. The alloy electrode had a larger p-type photoresponse than that on the Cu electrode, which implied a thicker CU2O layer on the alloy electrode surface resulting from NiO. In 0.05mol/L Na2SO4 solution (pH=9.1), the Cu electrode showed a p-type photoresponse initially, which changed to n-type when pitting corrosion occured at potentials more possitive than the critical breakdown potential. The transition from p-type to n-type might be related to the doping of the Cu2O film by SO42- ions.