Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 34, Issue 6, Pages 2758-2764Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2009.01.070
Keywords
Composited electrocatalyst; Methanol electrooxidation; Alkaline electrolyte; NiOOH; XPS
Categories
Funding
- National Key Basic Research Program of China [2008CB617502]
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The methanol electrooxidation reaction was studied on carbon dispersed Pd-nickel oxide nanocatalysts in KOH/CH3OH solutions. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) were used to characterize PdNiO/C catalysts. The electrochemical behaviors for the methanol electrooxidation reaction were measured in a powder microelectrode by cyclic voltammetry and Tafel plots. The result showed that the adding NiO enhances the anti-poison ability of PdNiO/C catalyst, but the reaction mechanism does not change. The anti-poison ability of PdNiO/C catalyst can be enhanced by three ways: (1) the NiOOH on the surface of catalyst improves the activity of composite catalyst for methanol oxidation; (2) the catalytic role of NiO for methanol dehydration; (3) the promotion of large amount active species-PdO (low oxidation state) for methanol oxidation. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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