Journal
JOURNAL OF POWER SOURCES
Volume 134, Issue 2, Pages 160-169Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2004.02.034
Keywords
nickel catalyst; electro-catalysis; methanol fuel cell
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The use of Ni as a catalyst for the electro-oxidation of methanol in alkaline medium was studied by cyclic voltammetry. It was found that only Ni dispersed on graphite shows a catalytic activity towards methanol oxidation but massive Ni does not. Ni was dispersed on graphite by the electro-deposition from acidic NiSO4 Solution using potentiostatic and galvanostatic techniques. The catalytic activity of the C/Ni electrodes towards methanol oxidation was found to vary with the amount of electro-deposited Ni. The dependence of the oxidation current on methanol concentration and scan rate was discussed. It was concluded from the electro-chemical measurements and SENT analysis that methanol oxidation starts as Ni-oxide is formed on the electrode surface. (C) 2004 Elsevier B.V. All rights reserved.
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