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Accession Number ADA591233
Title Enhanced Fuel Cell Catalyst Durability with Nitrogen Modified Carbon Supports.
Publication Date Feb 2013
Media Count 9p
Personal Author A. A. Dameron K. Wood K. E. Hurst S. Pylpenko T. S. Olson
Abstract This work illustrates the utility and improved performance of nitrogen-modified catalyst supports for direct methanol fuel cell (DMFC) applications. A unique two-step vapor-phase synthesis procedure is used to achieve the N-modification and Pt-Ru decoration of high surface-area carbon powders relevant to integration as electrocatalysts in fuel cell membrane electrode assemblies (MEAs). First, nitrogen surface moieties are incorporated into a commercial high surface area carbon support via a N-ion implantation technique, followed by Pt-Ru nanoparticle deposition via magnetron sputtering. The nitrogen-ion implantation of high surface area carbon supports yields superior Pt-Ru catalyst particle stability and performance as compared to industry standards. Specifically, results indicate a higher retention of metal catalyst surface area and electrochemical activity after accelerated electrochemical degradation testing. Further, characterization of catalyst materials before, during and after the electrochemical cycling provides insight into the catalyst particle coarsening and/or catalyst surface area loss mechanisms that dominate this fuel cell catalyst system.
Keywords Carbon
Carbon supports
Degradation
Deposition
Direct methanol fuel cells
Dmfc(Direct methanol fuel cells)
Durability
Ecsa(Electrochemical surface area)
Electrocatalysts
Electrochemistry
Electrodes
High surface-area carbon powders
Magnetrons
Mea(Membrane electrode assemblies)
Nanoparticles
Nitrogen
Nitrogen modification
Platinum
Rubidium
Sputtering
Synthesis(Chemistry)
Vapor phases

 
Source Agency Non Paid ADAS
NTIS Subject Category 99D - Basic & Synthetic Chemistry
99F - Physical & Theoretical Chemistry
97M - Batteries & Components
Corporate Author National Renewable Energy Lab., Golden, CO.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1411
Contract Number W911NF-09-1-0528 DE-AC36-08-GO28308

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