Orienting Oxygen Vacancies for Fast Catalytic Reaction

被引：99
作者：
Jeen, Hyoungjeen [1 ]
Bi, Zhonghe [1 ]
Choi, Woo Seok [1 ]
Chisholm, Matthew F. [1 ]
Bridges, Craig A. [1 ]
Paranthaman, M. Parans [1 ]
Lee, Ho Nyung [1 ]
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
ADVANCED MATERIALS | 2013年 / 25卷 / 44期
关键词：
solid oxide fuel cells; oxygen reduction reaction; pulsed laser epitaxy; brownmillerite; strontium cobaltite; FUEL-CELLS; ELECTRODES; EXCHANGE; SRCOO2.5; BROWNMILLERITE; SPECTROSCOPY; PEROVSKITES; DIFFUSION; IMPEDANCE; DESIGN;
D O I：
10.1002/adma.201302919
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A strategy to enhance the catalytic activity at the surface of an oxide thin film is unveiled through epitaxial orientation control of the surface oxygen vacancy concentration. By tuning the direction of the oxygen vacancy channels (OVCs) in the brownmillerite SrCoO2.5, a 100-fold improvement in the oxygen reduction kinetics is realized in an epitaxial thin film that has the OVCs open to the surface. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：6459 / 6463
页数：5
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