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나노입자 연구단
나노입자 연구단
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Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid

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Title
Effect of Se modification on RuSey/C electrocatalyst for oxygen reduction with phosphoric acid
Author(s)
Hee-Young Park; Sung Jong Yoo; Soo Jin Kim; Sang-Young Lee; Hyung Chul Ham; Yung Eun Sung; Soo-Kil Kim; Seung Jun Hwang; Hyoung-Juhn Kim; EunAe Cho; Dirk Henkensmeier; Suk Woo Nam; Tae-Hoon Lim; Jong Hyun Jang
Publication Date
2013-02
Journal
ELECTROCHEMISTRY COMMUNICATIONS, v.27, no., pp.46 - 49
Publisher
ELSEVIER SCIENCE INC
Abstract
Carbon-supported Se-modified-Ru catalysts (RuSey/C) were synthesized, and their phosphate adsorption characteristics were evaluated using electrochemical techniques and in-situ X-ray absorption spectroscopy (XAS). When phosphoric acid was added, the ORR activity of unmodified Ru/C decreased by 26.8% because the active sites were blocked by electrochemical adsorption, as confirmed by CV. However, for RuSey/C, the ORR activity was enhanced with phosphoric acid (RuSe1.56/C: 63.8%), which indicates that the kinetics at each site increased to compensate for the site blocking effect. The XAS results demonstrated that, for RuSey/C, phosphoric acid molecules or phosphate anions primarily interacted with Se atoms, and the oxidation state of Ru atoms decreased. Therefore, it was concluded that the enhanced ORR kinetics originated from the decreased oxygen binding energy with larger electrostatic repulsion. © 2012 Elsevier B.V. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/1392
ISSN
1388-2481
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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