Extraordinarily small Tafel slope for oxide formation reaction on Pt (111) surface

被引：19

作者：

Kodama, Kensaku ^{[1
]}

Jinnouchi, Ryosuke ^{[1
]}

Suzuki, Takahisa ^{[1
]}

Hatanaka, Tatsuya ^{[1
]}

Morimoto, Yu ^{[1
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

来源：

ELECTROCHIMICA ACTA | 2012年 / 78卷

关键词：

Pt (111) single crystal; Potential hold; Oxide formation; Tafel slope; Bockris mechanism; ELECTROCHEMICAL FORMATION; NOBLE-METALS; REDUCTION; OXYGEN; PLATINUM; PT(111); MODEL; KINETICS; ELECTROOXIDATION; ELECTRODES;

D O I：

10.1016/j.electacta.2012.06.061

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Oxide formation reaction current density on Pt (1 1 1) was estimated by time-differentiating oxide growth curves during a potential hold as a function of the potential and the coverage with the oxide below 0.35 ML (monolayer). The Tafel slope was 18-24 mV decade(-1) in the condition where the Tafel plot is on a straight line. The reaction mechanism accounting for this small slope was proposed, in which the oxide formation process is assumed as a combination of a fast electron transfer step and a following slow step. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：592 / 596

页数：5

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