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薄层光谱电化学方法研究[Ag(lO6)2]7-和[Cu(lO6)2]7-的阴极还原
STUDY ON THE ELECTROREDUCTION OF [Ag(IO6)2]7- AND [Cu(IO6)2]7- BY THIN LAYER SPECTROELECTROCHEMICAL METHOD
【摘要】 <正> 在碱性介质中只有少数氧化剂如Ag(Ⅲ)及Cu(Ⅲ)仍有较强的氧化性,因此研究Ag(Ⅲ)、Cu(Ⅲ)络合物阴极还原的电极电势、电子转移数及还原机理,对于深入了解它们作为氧化剂时的氧化还原特性是有帮助的.本文用薄层光谱电化学方法测定了二过碘酸合银(Ⅲ)、络离子在不同pH条件下还原反应的E~0′和电子转移数(n),并由此推断阴极还原反应机理,还用同样方法研究了二过碘酸含铜(Ⅲ)络离子的阴极还原.
【Abstract】 The reduction of [Ag(IO6 )2]7- at an Au minigrid electrode was studied by using thinlayer spectroelectrochemical method.The reaction was found to proceed in two steps,namely:Ag(Ⅲ) →Ag(Ⅰ) and Ag(Ⅰ) →Ag(0). From the measured formal redox potential E0’ atvarious pH a linear equation was obtained: E0’ = 1.611 - 0.086pH (V vs SCE). The reduc-tion of copper complex was studied in the same way.
【关键词】 薄层光谱电化学;
银(Ⅱ)络离子;
铜(Ⅲ)络离子;
【Key words】 Thin layer spectroelectrochemistry; Complex ion of silver (Ⅲ); Complex ion of copper (Ⅲ);
【Key words】 Thin layer spectroelectrochemistry; Complex ion of silver (Ⅲ); Complex ion of copper (Ⅲ);
【基金】 国家自然科学基金
- 【文献出处】 应用化学 ,Chinese Journal of Applied Chemistry , 编辑部邮箱 ,1989年02期
- 【被引频次】3
- 【下载频次】26