This study experimentally examines the enhancement of carbon supported Pt-based catalysts systems via nitrogen doping. It has been reported that nitrogen-containing carbons promote significant enhancement in Pt/C catalyst activity and durability with respect to the methanol oxidation and oxygen reduction reactions. In order to systematically investigate the effect of N-doping, in this work we have developed geometrically well-defined model catalytic systems consisting of tunable assemblies of Pt catalyst nanoparticles deposited onto both N-doped and undoped highly-oriented pyrolytic graphite (HOPG) substrates. N-doping was achieved via ion beam implantation, and Pt was electrodeposited from solutions of H2PtCl6 in aqueous HClO4. Morphology from scanning electron microscopy (SEM) and catalytic activity measurement from aqueous electrochemical analysis were utilized to examine the N-doping effects. The results strongly support the theory that doping nitrogen into a graphite support significantly affects both the morphology and behavior of the overlying Pt nanoparticles. In particular, nitrogen-doping was observed to cause a significant decrease in the average Pt nanoparticle size, an increase in the Pt nanoparticle dispersion, and a significant increase in catalytic activity for both methanol oxidation and oxygen reduction.
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ASME 2008 3rd Energy Nanotechnology International Conference collocated with the Heat Transfer, Fluids Engineering, and Energy Sustainability Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-4323-9
PROCEEDINGS PAPER
Enhancement of Pt-Based Catalysts via N-Doped Carbon Supports
Ryan O’Hayre,
Ryan O’Hayre
Colorado School of Mines, Golden, CO
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Yingke Zhou,
Yingke Zhou
Colorado School of Mines, Golden, CO
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Robert Pasquarelli,
Robert Pasquarelli
Colorado School of Mines, Golden, CO
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Joe Berry,
Joe Berry
National Renewable Energy Laboratory, Golden, CO
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David Ginley
David Ginley
National Renewable Energy Laboratory, Golden, CO
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Ryan O’Hayre
Colorado School of Mines, Golden, CO
Yingke Zhou
Colorado School of Mines, Golden, CO
Robert Pasquarelli
Colorado School of Mines, Golden, CO
Joe Berry
National Renewable Energy Laboratory, Golden, CO
David Ginley
National Renewable Energy Laboratory, Golden, CO
Paper No:
ENIC2008-53078, pp. 25-29; 5 pages
Published Online:
June 5, 2009
Citation
O’Hayre, R, Zhou, Y, Pasquarelli, R, Berry, J, & Ginley, D. "Enhancement of Pt-Based Catalysts via N-Doped Carbon Supports." Proceedings of the ASME 2008 3rd Energy Nanotechnology International Conference collocated with the Heat Transfer, Fluids Engineering, and Energy Sustainability Conferences. ASME 2008 3rd Energy Nanotechnology International Conference. Jacksonville, Florida, USA. August 10–14, 2008. pp. 25-29. ASME. https://doi.org/10.1115/ENIC2008-53078
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