Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 333, Issue 1, Pages 254-262Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.01.020
Keywords
Formic acid; Formaldehyde; Single walled carbon nanotubes (SWCNTs); Pt nanoparticles; Pt-Pd nanoparticles; Fuel cells
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A potent catalyst has been prepared consisting of platinum (Pt), and platinum-palladium (Pt-Pd) nanoparticles supported on purified single-walled carbon nanotubes (Pt/CNT and Pt-Pd/CNT). Electrochemical characteristics of formic acid and formaldehyde oxidation on these catalysts are investigated via cyclic voltammetric analysis in mixed 0.5 M HCOCH (or 0.5 M HCHO) and 0.5 M H2SO4 solutions. The results imply that the Pt-Pd/CNT electrodes exhibit a better activity than the corresponding Pt nanoparticles modified SWCNT electrodes. The modified electrode exhibits significant electrocatalytic activity towards formic acid and formaldehyde oxidation, which may be attributed due to the uniform dispersion of nanoparticles on SWCNTs and the efficacy of Pd species in Pt-Pd system. Such nanoparticles modified CNT electrodes exhibit better catalytic behavior towards formic acid and formaldehyde than the cot-responding carbon electrodes, indicating that the system studied in the present work is the more promising system for use in fuel cells. (c) 2009 Published by Elsevier Inc.
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