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Nanosized Pt-La alloy electrocatalysts with high activity and stability for the oxygen reduction reaction

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Title
Nanosized Pt-La alloy electrocatalysts with high activity and stability for the oxygen reduction reaction
Author(s)
Sung Jong Yoo; Sung Yung Eun
Publication Date
2015-01
Journal
SURFACE SCIENCE, v.631, no., pp.272 - 277
Publisher
ELSEVIER SCIENCE BV
Abstract
Although alloying with late transition metals such as Ni, Co, and Fe significantly enhances the oxygen reduction reaction (ORR) activity, stability issues have inhibited further performance improvements of fuel cells. Acidic media (pH b 1) at high electrochemical potential (N0.7 VRHE) induced metal dissolution and also affected the catalytic activity. In terms of the stability issues of alloy nanoparticles, we focused on the early-transitionmetal alloy system (Pt.La) as a promising candidate to realize both high activity and stability. The high activity and stability were attributed to electronic perturbations, which were the changes in the filling of the d band and the heat of alloy formation, as confirmed by experimental results. ⓒ 2014 Elsevier B.V. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/2137
ISSN
0039-6028
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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