Formate, an active intermediate for direct oxidation of methanol on Pt electrode

被引：432

作者：

Chen, YX

Miki, A

Ye, S ^{[1
]}

Sakai, H

Osawa, M

机构：

[1] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0600811, Japan

[2] Hokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 13期

关键词：

D O I：

10.1021/ja029044t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electro-oxidation of methanol on a Pt thin film electrode in acidic solution has been investigated by in situ surface-enhanced IR absorption spectroscopy. A new IR peak is observed at around 1320 cm-1 when the electrode potential is more positive than 0.5 V, where the bulk oxidation of MeOH occurs. This peak has been assigned to the symmetric stretching of formate species adsorbed on the Pt electrode surface. It is the first observation of formate adsorption during the electro-oxidation of methanol on a Pt surface. A near proportional relationship between the intensity of the IR band of the formate species and MeOH electro-oxidation current is observed. A new reaction scheme via non-CO pathway with formate as the active intermediate is proposed for the methanol electro-oxidation process. Copyright © 2003 American Chemical Society.

引用

页码：3680 / 3681

页数：2

共 16 条

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