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Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction.
MedLine Citation:
PMID:  23047673     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Stability is one of the main requirements for commercializing fuel cell electrocatalysts for automotive applications. Platinum is the best-known catalyst for oxygen reduction in cathodes, but it undergoes dissolution during potential changes while driving electric vehicles, thus hampering commercial adoption. Here we report a new class of highly stable, active electrocatalysts comprising platinum monolayers on palladium-gold alloy nanoparticles. In fuel-cell tests, this electrocatalyst with its ultra-low platinum content showed minimal degradation in activity over 100,000 cycles between potentials 0.6 and 1.0 V. Under more severe conditions with a potential range of 0.6-1.4 V, again we registered no marked losses in platinum and gold despite the dissolution of palladium. These data coupled with theoretical analyses demonstrated that adding a small amount of gold to palladium and forming highly uniform nanoparticle cores make the platinum monolayer electrocatalyst significantly tolerant and very promising for the automotive application of fuel cells.
Authors:
Kotaro Sasaki; Hideo Naohara; Yongman Choi; Yun Cai; Wei-Fu Chen; Ping Liu; Radoslav R Adzic
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nature communications     Volume:  3     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  1115     Citation Subset:  IM    
Affiliation:
Chemistry Department, Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA.
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