Electrochemical characterization of composite films of LaNiO3 and polypyrrole for electrocatalysis of O2 reduction

被引：0

作者：

Singh, R. N. ^{[1
]}

Malviya, M.

Chartier, P.

机构：

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

[2] Univ Strasbourg 1, CNRS, UMR 7177, ULP,LC3,Inst Chim,Lab Electrochim & Chim Phys Cor, F-67000 Strasbourg, France

来源：

JOURNAL OF NEW MATERIALS FOR ELECTROCHEMICAL SYSTEMS | 2007年 / 10卷 / 03期

关键词：

oxygen electroreduction; perovskite; LaNiO3; polypyrrole; composite electrode; electrochemical impedance spectroscopy;

D O I：

暂无

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electronically conductive composite electrodes G/PPy/PPy(Ox)/PPy made of polypyrrole, PPy, and the perovskite oxide LaNiO3 on graphite, G, have been obtained following a sequential electrodeposition method and were investigated by electrochemical impedance spectroscopy, linear and cyclic voltammetries in an aqueous solution containing 0.5 M K(2)SO(4)plus 5 mM KOH at 25 degrees C. Results showed that the electrical conductivity of the composite electrode remained practically constant under the cathodic polarization condition. The electrocatalytic activity of LaNiO3 towards the oxygen reduction reaction (ORR) enhanced greatly when it was used in the form of the composite electrode. The incorporation of oxide particles has been observed to influence the morphology of the polymer film.

引用

页码：181 / 186

页数：6

共 32 条

[1] Oxygen reduction reaction kinetics and mechanism on platinum nanoparticles inside Nafion® [J].