CURRENT OSCILLATIONS IN THE ELECTROCHEMICAL OXIDATION OF FORMIC-ACID AT PT SINGLE-CRYSTAL SURFACES

被引：38

作者：

RASPEL, F ^{[1
]}

EISWIRTH, M ^{[1
]}

机构：

[1] MAX PLANCK GESELL, FRITZ HABER INST, D-14195 BERLIN, GERMANY

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 31期

关键词：

D O I：

10.1021/j100082a036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical oxidation of formic acid under potentiostatic conditions was found to exhibit transient oscillations on all three low-index plane Pt surfaces in an unstirred electrolyte. Depending on structure, substantial differences occurred concerning induction time, oscillation period, and shape as well as number of oscillations. Stirring could stop the oscillations, but also restart them when they had faded spontaneously. It is shown that a potentiostatic model, based on the branched oxidation path of formic acid and taking the pH in the double layer into account, can qualitatively explain the observed phenomena.

引用

页码：7613 / 7618

页数：6

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