| Highly stable Pt monolayer on PdAu nanoparticle electrocatalysts for the oxygen reduction reaction. | |
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MedLine Citation:
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PMID: 23047673 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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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. |
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Authors:
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Kotaro Sasaki; Hideo Naohara; Yongman Choi; Yun Cai; Wei-Fu Chen; Ping Liu; Radoslav R Adzic |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Nature communications Volume: 3 ISSN: 2041-1723 ISO Abbreviation: Nat Commun Publication Date: 2012 Oct |
Date Detail:
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Created Date: 2012-10-10 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101528555 Medline TA: Nat Commun Country: England |
Other Details:
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Languages: eng Pagination: 1115 Citation Subset: IM |
Affiliation:
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Chemistry Department, Brookhaven National Laboratory, Building 555, Upton, New York 11973-5000, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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