Influence of the alkali metal cations on the activity of Pt(111) towards model electrocatalytic reactions in acidic sulfuric media

被引：36

作者：

Tymoczko, Jakub ^{[1
,2
]}

Colic, Viktor ^{[1
]}

Ganassin, Alberto ^{[1
,2
]}

Schuhmann, Wolfgang ^{[1
,2
]}

Bandarenka, Aliaksandr S. ^{[1
,3
]}

机构：

[1] Ruhr Univ Bochum, CES, D-44780 Bochum, Germany

[2] Ruhr Univ Bochum, Analyt Chem Elektroanalyt & Sensorik, D-44780 Bochum, Germany

[3] Tech Univ Munich, Phys Dept ECS, D-85748 Garching, Germany

来源：

CATALYSIS TODAY | 2015年 / 244卷

关键词：

Electrocatalysis; Electrochemical interface; Oxygen reduction; Oxygen evolution; Hydrogen evolution; Alkali metal ions; OXYGEN REDUCTION; NONCOVALENT INTERACTIONS; HYDROGEN EVOLUTION; OXIDE SURFACES; CELL; CATALYSTS; PLATINUM; ELECTRODES; DESIGN; DESCRIPTORS;

D O I：

10.1016/j.cattod.2014.07.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The impact of the alkali metal cations (Li+, Na+, K+, Rb+, Cs+) on the catalytic activity of Pt(1 1 1) electrodes towards model reactions (oxygen reduction, oxygen evolution, hydrogen evolution and hydrogen oxidation) in sulfuric acid has been evaluated. In contrast to essentially monotonic activity trends (i.e. from Li+ to Cs+) reported in the literature for alkaline media, the nature of the cations influences the activity of the Pt electrodes largely non-monotonously in the presence of SO42- ions. This is in certain cases due to the specifically adsorbing (bi) sulfate anions which make interactions between electrolyte components and reaction intermediates very complex. Surprisingly, the activity of the Pt(1 1 1) electrodes towards all investigated electrocatalytic reactions was substantially higher in Rb+ ions containing electrolytes (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：96 / 102

页数：7

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