Bimetallic Ru Electrocatalysts for the OER and Electrolytic Water Splitting in Acidic Media

被引：150

作者：

Forgie, Rhys ^{[1
]}

Bugosh, Greg ^{[1
]}

Neyerlin, K. C. ^{[1
]}

Liu, Zengcai ^{[1
]}

Strasser, Peter ^{[1
,2
]}

机构：

[1] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA

[2] Tech Univ Berlin, Div Chem Engn, Dept Chem, Electrochem Energy Catalysis & Mat Sci Lab, D-10623 Berlin, Germany

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2010年 / 13卷 / 04期

关键词：

OXYGEN EVOLUTION REACTION; SURFACE-AREAS; RUTHENIUM; FILMS; CELLS; COMBINATORIAL; PLATINUM; IRIDIUM; COPPER;

D O I：

10.1149/1.3290735

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We have explored bimetallic Ru-M oxygen evolution reaction (OER) electrocatalysts for use in water splitting in acidic electrolytes. Using an electrochemical multielectrode cell, we investigated the OER activity of selected compositions of seven binary alloy systems, Ru-M (M = Pd, Ir, Cu, Co, Re, Cr, Ni). Benchmarked using pure Ru electrocatalysts, Ru-Co, Ru-Ir, and Ru-Cu exhibited improved Ru mass-based catalytic activities. Structural studies of the precursor alloys indicated the presence of hexagonal and cubic mixed metal phases. We hypothesize that the secondary metal component modulates the chemisorption energy of oxygen, which was suggested to be a sensitive rate controlling parameter in the OER catalysis and favors the formation of atomic oxygen O(ad) and possibly HOO(ad) species rather than OH(ad) species on the oxide catalyst. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3290735] All rights reserved.

引用

页码：D36 / D39

页数：4

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