In:
ECS Transactions, The Electrochemical Society, Vol. 33, No. 1 ( 2010-10-01), p. 369-377
Abstract:
Loss of nanoparticle surface area under polymer electrolyte membrane fuel cell (PEMFC) operating conditions is an important barrier to the practical application of PEMFCs. We have developed an electrochemical rate theory model to better understand a number of aspects of Pt surface area loss, including the effects of particle size distribution, crossover molecular hydrogen, and Pt oxidation. As a specific example we here discuss some initial efforts to understand the effects of temperature on Pt nanoparticle stability. We compare our results to a previously developed first-order kinetic model and use this comparison to evaluate the role of the kinetic activation enthalpy for Pt dissolution and precipitation on overall surface area loss.
Type of Medium:
Online Resource
ISSN:
1938-5862
,
1938-6737
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2010
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