金属间化合物PtBi对甲酸的电催化氧化

从 1839 年 Grove 首次提出了燃料电池理论, 并 证实了氢/氧燃料电池能直接把化学能转化为电能 以来, 氢/氧燃料电池迅速发展起来。但是由于氢气 在储存、运输以及供应方面存在很多难以克服的困 难, 而有机分子的重整制氢成本太高以及电池构造 复杂等因素1,2], 使得人们将目光

Electrocatalytic Activity of Ordered Intermetallic PtBi for Formic Acid Electrooxidation

Ordered intermetallic PtBi had been synthesized by arc-melted and then sintering treatment. The electro-oxidation of liquid formic acid on PtBi was investigated at room temperature by cyclic voltammetry and chronoamperometry. The results are compared to those at a polycrystalline platinum electrode surface. At PtBi surface the onset potential for formic acid oxidation is shifted negatively by over 250 mV and the current density at the PtBi electrode is about ten multiple higher than that of Pt electrode. XRD and XPS technologies had been used to investigate the crystal structure and electron effect. We propose that formic acid decomposition on PtBi favors the reactive intermediate route and is not very much affected by the CO intermediate compared with Pt according to the results of electrochemical test and ex-site FTIR test.