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
收藏
页码：279 / 286
页数：8
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