Effect of de-alloying of Pt-Ni bimetallic nanoparticles on the oxygen reduction reaction

Title
Effect of de-alloying of Pt-Ni bimetallic nanoparticles on the oxygen reduction reaction
Authors
전태열유성종조용훈강순형성영은
Keywords
PEMFC; oxygen reduction reaction; Pt-Ni alloy; Fuel cell; Electrocatalyst
Issue Date
2010-12
Publisher
Electrochemistry communications
Citation
VOL 12, 1796-1799
Abstract
Carbon-supported Pt-Ni alloy nanoparticles with various compositions were prepared by a borohydride reduction method in anhydrous ethanol solvent. Here, we surveyed effect of thermally induced de-alloying on activity of the oxygen reduction reaction (ORR). Especially, changes in surface and bulk structures were investigated through electrochemical and spectroscopic measurements. The activity of as-prepared Pt-Ni alloy nanoparticles showed a monotonous dependence on Pt content. However, heattreatment induced the phase separation between Pt and NiO and the resultant enhancement in ORR activity without significant increase in surface Pt concentration.
URI
http://pubs.kist.re.kr/handle/201004/38557
ISSN
1388-2481
Appears in Collections:
KIST Publication > Article
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