Promoting Effects of La for Improved Oxygen Reduction Activity and High Stability of Pt on Pt-La Alloy Electrodes

Title
Promoting Effects of La for Improved Oxygen Reduction Activity and High Stability of Pt on Pt-La Alloy Electrodes
Authors
유성종황승준이준근이승철임태훈성영은Andrzej Wieckowski김수길
Issue Date
2012-06
Publisher
Energy & environmental science
Citation
VOL 5, NO 6, 7521-7525
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&#8211;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&#8211;M (M ¼ Ti, Fe, Zr and La).
URI
http://pubs.kist.re.kr/handle/201004/45668
ISSN
17545692
Appears in Collections:
KIST Publication > Article
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