Nanocatalysts impregnated polythiophene electrodes for the electrooxidation of formic acid

被引:62
作者
Selvaraj, V.
Alagar, M. [1 ]
Hamerton, I.
机构
[1] Anna Univ, Alagappa Coll Technol, Dept Chem Engn, Madras 600025, Tamil Nadu, India
[2] Univ Surrey, Sch Biomed & Mol Sci, Div Chem, Surrey GU2 7XH, England
关键词
electrocatalytic oxidation; polythiophene; platinum nanoparticles; Pt-Pd; bimetallic nanoparticles; formic acid oxidation; fuel cells;
D O I
10.1016/j.apcatb.2006.07.020
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Conductive and porous polythiophene (PTh) films, which are used as host matrixes for Pt and Pt-Pd nanoparticles, are synthesized electrochemically. PTh films containing nanometer-sized Pt and Pt-Pd bimetallic particles are electro synthesized on an indium doped tin oxide (ITO) plate by voltammetric cycling between -0.2 and +1.4 V (versus Ag/AgCl/3 M NaCl). The ensuing PTh electrode, modified with nanoparticles, was probed for its catalytic activity towards the electrooxidation of formic acid, an industrially important material. The modified electrode exhibits significant eletrocatalytic activity towards the oxidation of formic acid and this may be attributed to (a) the uniform dispersion of nanoparticles in the PTh film and (b) the efficacy of the nature of Pd species in Pt-Pd bimetallic systems. Monometallic (Pt) and bimetallic (Pt-Pd) nanoparticles are found to be uniformly dispersed in PTh matrixes as confirmed from analytical data using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Energy dispersive X-ray analysis (EDAX) is used to characterize the composition of metal present in the nanoparticles modified electrodes. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:172 / 179
页数:8
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