摘要
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.
The reduction of [Ag(IO_6 )_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 E^0' atvarious pH a linear equation was obtained: E^0' = 1.611 - 0.086pH (V vs SCE). The reduc-tion of copper complex was studied in the same way.
出处
《应用化学》
CAS
CSCD
北大核心
1989年第2期92-94,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
银络离子
铜络离子
阴极还原
Thin layer spectroelectrochemistry
Complex ion of silver (Ⅲ)
Complex ion of copper (Ⅲ)
