A Methanol-Tolerant Carbon-Supported Pt-Au Alloy Cathode Catalyst for Direct Methanol Fuel Cells and Its Evaluation by DFT
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
A Methanol-Tolerant Carbon-Supported Pt-Au Alloy Cathode Catalyst for Direct Methanol Fuel Cells and Its Evaluation by DFT
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| Creator |
Selvarani, G.
Vinod Selvaganesh, S. Krishnamurthy, S. Krruthika, G.V.M. Sridhar, P. Pitchumani, S. Shukla, A.K. |
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| Subject |
Electrochemical Materials Science
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| Description |
A Pt-Au alloy catalyst of varying compositions is prepared by codeposition of Pt and Au nanoparticles onto
a carbon support to evaluate its electrocatalytic activity toward an oxygen reduction reaction (ORR) with
methanol tolerance in direct methanol fuel cells. The optimum atomic weight ratio of Pt to Au in the carbonsupported
Pt-Au alloy (Pt-Au/C) as established by cell polarization, linear-sweep voltammetry (LSV), and
cyclic voltammetry (CV) studies is determined to be 2:1. A direct methanol fuel cell (DMFC) comprising a
carbon-supported Pt-Au (2:1) alloy as the cathode catalyst delivers a peak power density of 120 mW/cm2 at
70 °C in contrast to the peak power density value of 80 mW/cm2 delivered by the DMFC with carbonsupported
Pt catalyst operating under identical conditions. Density functional theory (DFT) calculations on a
small model cluster reflect electron transfer from Pt to Au within the alloy to be responsible for the synergistic
promotion of the oxygen-reduction reaction on a Pt-Au electrode.
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| Publisher |
American Chemical Society
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| Date |
2009
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/553/1/125-2009.pdf
Selvarani, G. and Vinod Selvaganesh, S. and Krishnamurthy, S. and Krruthika, G.V.M. and Sridhar, P. and Pitchumani, S. and Shukla, A.K. (2009) A Methanol-Tolerant Carbon-Supported Pt-Au Alloy Cathode Catalyst for Direct Methanol Fuel Cells and Its Evaluation by DFT. Journal of Physical Chemistry C, 113 (17). pp. 7461-7468. ISSN 1932-7447 |
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| Relation |
http://cecri.csircentral.net/553/
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