Issue 6, 2012
From the journal:

Energy & Environmental Science

Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt–La alloy electrodes†

Sung Jong Yoo,a   Seung Jun Hwang,a   June-Gunn Lee,b   Seung-Cheol Lee,b   Tae-Hoon Lim,a   Yung-Eun Sung,c   Andrzej Wieckowskid  and  Soo-Kil Kim*e  

* Corresponding authors

a Fuel Cell Research Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul 136-791, Korea

b Computational Science Center, Korea Institute of Science and Technology, 39-1 Hawolgok-dong, Seoul 136-791, Korea

c World Class University Program of Chemical Convergence for Energy & Environment, School of Chemical and Biological Engineering, Seoul National University, Shinlimdong 56-1, Seoul 151-742, Korea

d Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA

e School of Integrative Engineering, Chung-Ang University, 221, Heukseok-Dong, Dongjak-Gu, Seoul, Korea
E-mail: sookilkim@cau.ac.kr
Fax: +82-2-814-2651
Tel: +82-2-820-5770

Abstract

The design of polymer electrolyte fuel cell electrocatalysts depends on two equally important fundamental principles: the optimization of electrocatalytic activities as well as the long-term stability under operating conditions (e.g., pH < 1 and E > 0.8 V). Pt-based alloys with transition metals (i.e., Pt–La) address both of these key issues. The oxygen reduction kinetics depends on the alloy composition which, in turn, is related to the d-band center position. The stability of the oxygen reduction reaction is predictable by correlation of the d-band fillings and vacancies of Pt–M (M = Ti, Fe, Zr and La).

Graphical abstract: Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt–La alloy electrodes

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Article information

DOI
https://doi.org/10.1039/C2EE02691K
Article type
Communication
Submitted
16 Sep 2011
Accepted
13 Feb 2012
First published
07 Mar 2012

Energy Environ. Sci., 2012,5, 7521-7525

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Promoting effects of La for improved oxygen reduction activity and high stability of Pt on Pt–La alloy electrodes

S. J. Yoo, S. J. Hwang, J. Lee, S. Lee, T. Lim, Y. Sung, A. Wieckowski and S. Kim, Energy Environ. Sci., 2012, 5, 7521 DOI: 10.1039/C2EE02691K

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