Comparative electrocatalytic oxidation of ethanol, ethylene glycol and glycerol in alkaline medium at Pd-decorated FeCo@Fe/C core-shell nanocatalysts

被引：119

作者：

Fashedemi, Omobosede O. ^{[1
]}

Ozoemena, Kenneth I. ^{[1
,2
]}

机构：

[1] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa

[2] CSIR, ZA-0001 Pretoria, South Africa

来源：

ELECTROCHIMICA ACTA | 2014年 / 128卷

关键词：

Palladium-based core-shell nanocatalyst; electrocatalysis; ethanol oxidation; ethylene glycol oxidation; glycerol oxidation; FORMIC-ACID; FUEL-CELLS; ALCOHOL ELECTROOXIDATION; ALLOY NANOPARTICLES; CARBON NANOTUBES; OXYGEN REDUCTION; ANODIC-OXIDATION; FACILE SYNTHESIS; CATALYSTS; METHANOL;

D O I：

10.1016/j.electacta.2013.10.194

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrocatalytic oxidation of alcohols in alkaline solutions is critical for the development of direct alkaline alcohol fuel cells (DAAFCs). This work investigated alcohol oxidation reaction (AOR) at a novel palladium-based core-shell nano catalyst (FeCo@Fe@Pd/C) obtained by the microwave-induced top-down nanostructuring and decoration (MITNAD) synthetic strategy. The electrocatalytic properties of the FeCo@Fe@Pd/C towards the oxidation of ethanol (EtOH), ethylene glycol (EG) and glycerol (Gly) were explored, and compared with those of the Pd/C alone. FeCo@Fe@Pd/C exhibited a remarkable performance in all three alcohols but its best electrocatalytic activity was found in the oxidation of EG where the electrocatalytic rate constant (K-cat) was about 2 times faster than seen in Gly and approximate to 4 times faster than in EtOH. The excellent performance towards EG was further corroborated by the low resistance to charge transport. Detailed comparison with literature reports shows that the FeCo@Fe@Pd/C is a potentially viable nanocatalyst for use in DAAFC. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：279 / 286

页数：8

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