作　　者： ; ;

机构地区： 华南师范大学化学与环境学院化学系

出　　处： 《化工时刊》 2000年第7期18-21,共4页

摘　　要： 利用伏安法研究了甲酸在Pt/M_(ad)(M=As、Sb、Bi)电极上的催化氧化。结果表明,铂电极经UPD生成的吸附砷、锑、铋原子修饰后可以通过几何效应阻止吸附毒物的生成,对甲酸的氧化呈现出较好的电催化活性。相比之下,在同液UPD情况下,吸附铋原子对甲酸氧化具有最好的催化活性;在异液UPD情况下,吸附锑、铋原子对甲酸氧化都具有较好的催化活性。此外,讨论了同液UPD法时As(Ⅲ)、Sb(Ⅲ)、Bi(Ⅲ)离子浓度对Pt/M_(ad)电极电催化活性的影响。 The catalytic oxidation of formic acid Pt/Mad(M=As,Sb,Bi) electroodes was investigated by voltammetry. The results showed that the Pt/Mad electrode have very good electrocatalytic activity in the oxydation of formic aicd and the Pt/Mad electrode can prevent the producing of adsorption poision by geometric effect. However, the actvities of the Pt/Sbad and Pt/Biad electrodes prepared by ex-situ UPD were higher than Pt/Asad, the actvity of the Pt/Biad electrode prepared by in-situ UPD was higher than Pt/Sbad and Pt/Asad. The effects of the concentration of M (Ⅲ) ion on the electrocatalytic activity were also studied and discussed.

关 键 词： 电催化氧化 吸附砷 锑 铋 铂电极

领　　域： [化学工程] [理学] [理学]