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Nanocatalysts impregnated polythiophene electrodes for the electrooxidation of formic acid

Selvaraj, V, Alagar, M and Hamerton, I (2007) Nanocatalysts impregnated polythiophene electrodes for the electrooxidation of formic acid APPLIED CATALYSIS B-ENVIRONMENTAL, 73 (1-2). 172 - 179. ISSN 0926-3373

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Abstract

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.

Item Type: Article
Additional Information: NOTICE: this is the author’s version of a work that was accepted for publication in Applied Catalysis B: Environmental. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Catalysis B: Environmental, 73(1-), April 2007, DOI 10.1016/j.apcatb.2006.07.020.
Uncontrolled Keywords: Science & Technology, Physical Sciences, Technology, Chemistry, Physical, Engineering, Environmental, Engineering, Chemical, Chemistry, Engineering, electrocatalytic oxidation, polythiophene, platinum nanoparticles, Pt-Pd, bimetallic nanoparticles, formic acid oxidation, fuel cells, HIGHLY DISPERSED ELECTRODES, GLASSY-CARBON ELECTRODE, SMALL ORGANIC-MOLECULES, NOBLE-METAL ELECTRODES, ELECTROCATALYTIC OXIDATION, METHANOL OXIDATION, PLATINUM-ELECTRODE, POLYPYRROLE FILMS, FUEL-CELLS, UNDERPOTENTIAL DEPOSITION
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Divisions: Faculty of Engineering and Physical Sciences > Chemistry
Depositing User: Symplectic Elements
Date Deposited: 26 Mar 2012 08:12
Last Modified: 23 Sep 2013 19:20
URI: http://epubs.surrey.ac.uk/id/eprint/326438

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