A scenario for oxygen reduction in alkaline media

被引：16

作者：

Ignaczak, Anna ^{[4
]}

Nazmutdinov, Renat ^{[3
]}

Goduljan, Aleksej ^{[1
]}

de Campos Pinto, Leandro Moreira ^{[1
,6
]}

Juarez, Fernanda ^{[1
]}

Quaino, Paola ^{[5
]}

Santos, Elizabeth ^{[1
,2
]}

Schmickler, Wolfgang ^{[1
]}

机构：

[1] Univ Ulm, Inst Theoret Chem, D-89069 Ulm, Germany

[2] Univ Nacl Cordoba, IFEG, CONICET, FAMAF, Cordoba, Argentina

[3] Kazan Natl Res Technol Univ, Kazan 420015, Russia

[4] Univ Lodz, Fac Chem, Dept Theoret & Struct Chem, Pomorska 163-165, PL-90236 Lodz, Poland

[5] Univ Nacl Litoral, PRELINE, Santa Fe, Argentina

[6] Univ Fed Mato Grosso do Sul, Inst Qum, BR-79074460 Campo Grande, MS, Brazil

来源：

NANO ENERGY | 2016年 / 29卷

关键词：

Oxygen reduction; Alkaline fuel cells; Outer sphere-electron transfer; Oxygen-oxygen bond breaking; SINGLE-CRYSTAL SURFACES; O-2; REDUCTION; ADSORPTION; ELECTROCATALYSIS; OXIDATION; PLATINUM;

D O I：

10.1016/j.nanoen.2016.11.009

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：

We investigate oxygen reduction in alkaline solution with the focus on gold and silver electrodes. On the basis of theoretical considerations we propose a detailed mechanism, which we support by explicit calculations. In accordance with previous suggestions we conclude that the first step is an outer-sphere electron transfer to the oxygen molecule. The breaking of he oxygen-oxygen bond involves adsorption of OH on the electrode surface. This is much stronger on Au(100) than on Au(111), which explains why the former is a better catalyst.

引用

页码：362 / 368

页数：7

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