Graphene-supported [{Ru4O4(OH)2(H2O)4}-(γ-SiW10O36)2]10- for highly efficient electrocatalytic water oxidation

被引：119

作者：

Guo, Si-Xuan ^{[1
]}

Liu, Yuping ^{[1
]}

Lee, Chong-Yong ^{[1
]}

Bond, Alan M. ^{[1
]}

Zhang, Jie ^{[1
]}

Geletii, Yurii V. ^{[2
]}

Hill, Craig L. ^{[2
]}

机构：

[1] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[2] Emory Univ, Dept Chem, Atlanta, GA 30322 USA

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2013年 / 6卷 / 09期

基金：

美国国家科学基金会; 澳大利亚研究理事会;

关键词：

POLYOXOMETALATE; CATALYST; OXYGEN; REDUCTION; RUTHENIUM; IDENTIFICATION; MANGANESE; ELECTRODE; ISSUES;

D O I：

10.1039/c3ee41892h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electrochemistry of the Ru-containing polyoxometalate (POM) water oxidation molecular catalyst, Rb8K2[{Ru4O4(OH)(2)(H2O)(4)}(gamma-SiW10O36)(2)](10) (Rb8K2-1), has been studied by cyclic and rotating disk electrode voltammetric methods in aqueous media under acidic and neutral pH conditions using bare glassy carbon (GC) and graphene modified GC electrodes. High concentrations of supporting electrolyte are needed in neutral pH conditions to overcome the electrical double layer effect associated with the highly negatively charged 1. Complex 1 can be confined within the highly porous wet graphene film to form a stable modified electrode, which shows excellent catalytic activity and high stability toward the water oxidation reaction under neutral pH conditions, particularly in the presence of 1.0 M Ca(NO3)(2). The catalytic activity of the graphene supported 1 electrode is nearly two orders of magnitude higher than that reported with a polymer coated multiwalled carbon nanotube supported 1 electrode when both are employed at a moderate overpotential of 0.35 V.

引用

页码：2654 / 2663

页数：10

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