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 on Pt / M_ (ad) (M = As, Sb, Bi) electrodes was investigated by voltammetry. The results showed that the adsorption of arsenic, antimony and bismuth atoms generated by UPD on Pt electrode can prevent the generation of adsorbed toxic substances through the geometric effect, and the oxidation of formic acid shows good electrocatalytic activity. In contrast, in the same liquid UPD, the adsorption of bismuth atoms on the oxidation of formic acid has the best catalytic activity; in the case of different liquid UPD, adsorption of antimony, bismuth atoms for the oxidation of formic acid has good catalytic activity. In addition, the effects of As (Ⅲ), Sb (Ⅲ) and Bi (Ⅲ) ion concentration on the electrocatalytic activity of Pt / M_ (ad) electrode were discussed.