The electroless deposition of catalysts using hydrazine dihydrochloride or formic acid as the reducing agent in a modified Leaman bath was investigated. The effect of potential on the composition was investigated by potentiostatically depositing thin films on gold from acidic chloride electrolytes at potentials between −0.46 V and 0.34 V (versus normal hydrogen electrode). The physical characteristics and elemental composition of the deposits were determined. An empirical model for the deposition process was developed, taking into account reactant concentration, temperature, and surface potential. The model accurately characterized the deposit composition over a wide Pt/Ru range. The surface potential was estimated to be 0.15 V during electroless deposition using formic acid as the reducing agent based on the empirical model. Deviations from the model were found when hydrazine was used as the reducing agent due to the formation of solution phase ruthenium complexes with hydrazine.
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e-mail: kohl@gatech.edu
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August 2010
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Electroless Deposition and Characterization of Catalysts on Pt/C Nanoparticles for Methanol Oxidation
William E. Mustain,
William E. Mustain
Department of Chemical, Materials, and Biomolecular Engineering,
University of Connecticut
, Storrs, CT 06268
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Hyea Kim,
Hyea Kim
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Vijai Narayanan,
Vijai Narayanan
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Tyler Osborn,
Tyler Osborn
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
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Paul A. Kohl
Paul A. Kohl
School of Chemical and Biomolecular Engineering,
e-mail: kohl@gatech.edu
Georgia Institute of Technology
, Atlanta, GA 30332
Search for other works by this author on:
William E. Mustain
Department of Chemical, Materials, and Biomolecular Engineering,
University of Connecticut
, Storrs, CT 06268
Hyea Kim
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Vijai Narayanan
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Tyler Osborn
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332
Paul A. Kohl
School of Chemical and Biomolecular Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332e-mail: kohl@gatech.edu
J. Fuel Cell Sci. Technol. Aug 2010, 7(4): 041013 (7 pages)
Published Online: April 8, 2010
Article history
Received:
December 8, 2008
Revised:
July 23, 2009
Online:
April 8, 2010
Published:
April 8, 2010
Citation
Mustain, W. E., Kim, H., Narayanan, V., Osborn, T., and Kohl, P. A. (April 8, 2010). "Electroless Deposition and Characterization of Catalysts on Pt/C Nanoparticles for Methanol Oxidation." ASME. J. Fuel Cell Sci. Technol. August 2010; 7(4): 041013. https://doi.org/10.1115/1.4000675
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