Electrocatalytic activity of electrodepo sited composite films of polypyrrole and CoFe2O4 nanoparticles towards oxygen reduction reaction

被引：71

作者：

Singh, RN ^{[1
]}

Lal, B ^{[1
]}

Malviya, M ^{[1
]}

机构：

[1] Banaras Hindu Univ, Fac Sci, Dept Chem, Varanasi 221005, Uttar Pradesh, India

来源：

ELECTROCHIMICA ACTA | 2004年 / 49卷 / 26期

关键词：

polypyrrole; composite electrode; nanoparticle; electrocatalytic activity; oxygen reduction;

D O I：

10.1016/j.electacta.2004.05.015

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical behaviour of sandwich-type composite electrodes of polypyrrole (PPy) and CoFe2O4 nanoparticles (Ox) were investigated in an aqueous solution of 0.5 M K2SO4 and 5mM KOH at 25 degreesC using electrochemical impedance (EI), cyclic voltammetry (CV) and Tafel polarization techniques. EI and CV studies indicated that the incorporation of oxide nanoparticles influenced the charge transfer and transport behaviours of the polymer matrix greatly. The bulk electrical resistances of pure polymer (4.5 +/- 1.7 Omega) as well as composite (2.7 +/- 0.8 Omega) electrodes were practically constant in the potential region, +0.1 to -0.7 V. The latter electrode showed a good electrocatalytic activity towards the oxygen reduction reaction (ORR). (C) 2004 Published by Elsevier Ltd.

引用

页码：4605 / 4612

页数：8

共 39 条

[1] MECHANISTIC STUDIES OF THE OXYGEN REACTIONS ON NICO2O4 SPINEL AND THE HYDROGEN EVOLUTION REACTION ON AMORPHOUS NI-CO SULFIDE [J].