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Energies 2009, 2(3), 789-804;

Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes

Department of Chemical and Biological Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
Author to whom correspondence should be addressed.
Current address: Northeastern University, Boston, MA 02148, USA.
Received: 5 August 2009 / Accepted: 11 September 2009 / Published: 16 September 2009
(This article belongs to the Special Issue Fuel Cells)
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Carbon nanotubes (CNTs) have been investigated in recent years as a catalyst support for proton exchange membrane fuel cells. Improved catalyst activities were observed and attributed to metal-support interactions. We report a study on the kinetics of methanol electro-oxidation on CNT supported Pt-Ru alloy nanoparticles. Alloy catalysts with different compositions, Pt53Ru47/CNT, Pt69Ru31/CNT and Pt77Ru23/CNT, were prepared and investigated in detail. Experiments were conducted at various temperatures, electrode potentials, and methanol concentrations. It was found that the reaction order of methanol electro-oxidation on the PtRu/CNT catalysts was consistent with what has been reported for PtRu alloys with a value of 0.5 in methanol concentrations. However, the electro-oxidation reaction on the PtRu/CNT catalysts displayed much lower activation energies than that on the Pt-Ru alloy catalysts unsupported or supported on carbon black (PtRu/CB). This study provides an overall kinetic evaluation of the PtRu/CNT catalysts and further demonstrates the beneficial role of CNTs. View Full-Text
Keywords: PtRu catalysts; methanol electro-oxidation; carbon nanotubes; fuel cells PtRu catalysts; methanol electro-oxidation; carbon nanotubes; fuel cells

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Li, L.; Xing, Y. Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes. Energies 2009, 2, 789-804.

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