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나노입자 연구단
나노입자 연구단
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Facile synthesis of platinum alloy electrocatalyst via aluminum reducing agent and the effect of post heat treatment for oxygen reduction reaction

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Title
Facile synthesis of platinum alloy electrocatalyst via aluminum reducing agent and the effect of post heat treatment for oxygen reduction reaction
Author(s)
Yun Sik Kang; Sung Jong Yoo; Myeong Jae Lee; Mi-Ju Kim; Stanfield Youngwon Lee; Kug-Seung Lee; Yung-Eun Sung
Publication Date
2016-12
Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.41, no., pp.22952 - 22962
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
We have synthesized carbon-supported Pt and PtM (Au, Pd) nanoparticles (NPs) by using an aluminum (Al) metal foil as a reducing agent and conducted post heat treatments to investigate the relationship between oxygen reduction reaction (ORR) activity and surface crystalline/electronic structures of electrocatalysts. The as-prepared Pt and PtM (Au, Pd) NPs received the post heat treatment to induce structural modifications to improve ORR activity. From structural characterizations, well-synthesized carbon-supported Pt and PtM (Au, Pd) NPs were confirmed and the post heat treatment has the effect of inducing the alteration of surface crystalline structure and results in higher ORR activity. Furthermore, based on electrochemical characterizations, it is proved that after the heat treatment, the surface reconstruction brought about the increased fraction of Pt (111) and electrochemical active surface area of PtAu/C CO sample. And, the downshift of Pt d-band center of PtPd/C CO sample, which decreases the affinity of Pt to oxygen species, occurred resulting in more favorable kinetics of ORR. © 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved
URI
https://pr.ibs.re.kr/handle/8788114/3510
ISSN
0360-3199
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
Inter. J. Hydrogen Energy(Facile synthesis of).pdfDownload

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