首页 | 本学科首页   官方微博 | 高级检索  
     检索      

硫化物电化学氧化过程研究
引用本文:刘秀玲,王佳.硫化物电化学氧化过程研究[J].材料保护,2001,34(3):1-3.
作者姓名:刘秀玲  王佳
作者单位:中国科学院海洋研究所
摘    要:用电化学方法研究了碱性溶液中硫化物在Pt电极上的氧化过程。结果表明,硫离子在-600-+750mV(vs.SCE)存在两个电化学氧化过程。经热力学、动力学和化学分析证实,在约-400mV时硫离子首先氧化为单质硫及多硫化物,沉积在电极表面;约250mV处,单质硫及多硫化物进一步氧化为硫酸根离子而进入溶液,低电位下的氧化反应是可逆反应,硫离子扩散为控制步骤;高电位下,单质硫进一步氧化为硫酸根离子的反应是不可逆反应,而两反应过程密切相关。

关 键 词:电化学氧化  硫化物  硫酸根离子  碱性溶液  铂电极
文章编号:1001-1560(2001)03-0001-03
修稿时间:2000年10月8日

Electrochemical Oxidization of Sulfide in Alkaline Solution
LIU Xiu-ling,WANG Jia.Electrochemical Oxidization of Sulfide in Alkaline Solution[J].Journal of Materials Protection,2001,34(3):1-3.
Authors:LIU Xiu-ling  WANG Jia
Abstract:Electrochemical oxidization of sulfide on platinum in alkaline solution has been studied by using electrochemical techniques.Results indicate that the two oxidizations of sulfide exist in the range from - 600 mV to + 750 mV(vs.SCE).From the point of view of thermodynamics,chemical analysis and kinetics,at - 400 mV the sulfide is first oxidized to sulphur and polysulfides deposited on the electrode,and at 250 mV sulphur is further oxidized to sulfate entering solution.Oxidization under lower potential is a reversible reaction and the rate-determining step of this reaction is sulfide ions-diffusion controlling.The reaction that sulphur is further oxidized to sulfate under higher potential is an irreversible reaction.These two processes are closely correlated with each other.
Keywords:
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号