Oxide (CeO2, NiO,Co3O4and Mn3O4)-promoted Pd/C electrocatalysts for alcohol electrooxidation in alkaline media

被引：349

作者：

Xu, Chanowei ^{[1
]}

Tian, Zhiqun ^{[1
]}

Shen, Peikang ^{[2
]}

Jiang, San Ping ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore

[2] Sun Yat Sen Univ, Sch Phys & Engn, Guangzhou 510275, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 05期

关键词：

alcohol; electrooxidation; fuel cells palladium; oxide;

D O I：

10.1016/j.electacta.2007.10.036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This study investigated Pt/C, Pd/C and oxide (CeO2, NiO, Co3O4 and Mn-3-O-4)-promoted Pd/C for electrooxidati on reactions of methanol, ethanol, ethylene glycol and glycerol in alkaline media. The results show that Pd/C electrocatalysts alone have low activity and very poor stability for the alcohol electrooxidation. However, addition of oxides like CeO2, NiO, Co3O4 and Mn3O4 significantly promotes catalytic activity and stability of the Pd/C electrocatalysts for the alcohol electrooxidation. The Pd-Co3O4 (2:1, w:w)/C shows the highest activity for the electrooxidation of methanol, EG and glycerol while the most active catalyst for the ethanol electrooxidation is Pd-NiO (6: 1, w:w)/C. On the other hand, Pd-Mn3O4/C shows significantly better performance stability than other oxide-promoted Pd/C for the alcohol electrooxidation. The poor stability of the Pd-Co3O4/C electrocatalysts is most likely related to the limited solubility of cobalt oxides in alkaline solutions. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2610 / 2618

页数：9

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