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题名: The spillover of oxygen vacancies over strontium doped lanthanum manganite (LSM) cathode catalysts
作者: Wang, SZ;  Jiang, Y;  Li, WZ;  Yan, JW;  Li, C;  Xin, Q
关键词: oxygen vacancy spillover ;  strontium doped lanthanum manganite electrode ;  solid oxide fuel cell ;  three phase boundary
刊名: SPILLOVER AND MIGRATION OF SURFACE SPECIES ON CATALYSTS
发表日期: 1997
卷: 112, 页:401-410
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Cyclic voltammetry and potential step techniques were used to characterize the features of the electrochemical reduction of oxygen on the strontium doped lanthanum manganite La(0.8)Sr(0.2)MnO(3) (LSM) electrode. An enhancement in the electrochemical activity of oxygen reduction and a unique cathodic current hysteresis in cyclic voltammograms were observed. The hysteresis became increasingly marked with the increase of oxygen partial pressure or the decrease of potential scan rate. Corresponding to the unique hysteresis of cyclic voltammograms, cathodic currents (i.e. electrochemical activity) during potential step measurements showed an exponential increase with time. The higher the oxygen partial pressure, the shorter time needed for the cathodic current to reach a limiting value. The unique hysteresis in cyclic voltammograms and the increase of the cathodic currents in potential step measurements were found to be related to the formation and spillover of oxygen vacancies at high temperatures, the kinetics of which is determined by temperature, oxygen partial pressure and the cathodic potential applied.
关键词[WOS]: IMPEDANCE SPECTROSCOPY ;  REDUCTION ;  LA1-XSRXMNO3
语种: 英语
WOS记录号: WOS:000071952700044
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142789
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Wang, SZ,Jiang, Y,Li, WZ,et al. The spillover of oxygen vacancies over strontium doped lanthanum manganite (LSM) cathode catalysts[J]. SPILLOVER AND MIGRATION OF SURFACE SPECIES ON CATALYSTS,1997,112:401-410.
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