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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
Current address: Northeastern University, Boston, MA 02148, USA.
* Author to whom correspondence should be addressed.
Received: 5 August 2009; Accepted: 11 September 2009 / Published: 16 September 2009
(This article belongs to the Special Issue Fuel Cells
Abstract: 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.
Keywords: PtRu catalysts; methanol electro-oxidation; carbon nanotubes; fuel cells
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MDPI and ACS Style
Li, L.; Xing, Y. Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes. Energies 2009, 2, 789-804.
Li L, Xing Y. Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes. Energies. 2009; 2(3):789-804.
Li, Liang; Xing, Yangchuan. 2009. "Methanol Electro-Oxidation on Pt-Ru Alloy Nanoparticles Supported on Carbon Nanotubes." Energies 2, no. 3: 789-804.