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Effect of Ni addition over PtRu/C based electrocatalysts for fuel cell applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
48743 46520 2006 10 PDF Available
Title
Effect of Ni addition over PtRu/C based electrocatalysts for fuel cell applications
Abstract

The electrocatalytic behaviour of PtRu/C is modified by the addition of nickel. Results from X-ray photoelectron spectroscopy reveal that the amount of surface Ni is less than the expected from the bulk stoichiometry, especially in the used samples where Ni was not detected. The oxidation state of Ni plays a key role on the catalytic performance of PtRuNi/C electrocatalysts, particularly in the CO oxidation reaction due to the development of Pt–Ni electronic interaction. The influence of the nature of the carbon support was also evaluated. Electrocatalysts prepared on a carbon-modified substrate displayed higher activities in the methanol oxidation reaction than those prepared over non-treated carbon. For the Ni-containing samples, the preparation route determines the degree of interaction between Pt and Ni of the different samples and hence their catalytic performance.

Keywords
Fuel cells; Electrocatalyst; Methanol electrooxidation; Nickel
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Effect of Ni addition over PtRu/C based electrocatalysts for fuel cell applications
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 69, Issues 1–2, 1 December 2006, Pages 75–84
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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