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题名: Kinetic study of the formation of oxygen vacancy on lanthanum manganite electrodes
作者: Jiang, Y;  Wang, SZ;  Zhang, YH;  Yan, JW;  Li, WZ
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
发表日期: 1998-02-01
卷: 145, 期:2, 页:373-378
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Materials Science, Coatings & Films
研究领域[WOS]: Electrochemistry ;  Materials Science
英文摘要: The electrochemical reduction of oxygen on lanthanum manganite (LSM) electrodes has been investigated by cyclic voltammetry, alternating current (ac) impedance, and, in particular, potential step. An emphasis was given to the study of the kinetics of the formation of oxygen vacancy, which is shown to be the main cause for the reversed hysteresis in cyclic voltammograms and for the increase in the electrochemical activity of oxygen reduction on the cathodically polarized LSM electrode observed in both ac impedance and in potential step experiments. The potential step experiments show that the oxygen vacancy concentration increases exponentially with time when the LSM is under a cathodic polarization. In the present study, the rate controlling step for the formation of oxygen vacancies is the oxygen vacancy generation step. The cathodic current rising from the reaction on oxygen vacancies can make a significant contribution to the total reduction current.
关键词[WOS]: STABILIZED ZIRCONIA ;  IMPEDANCE SPECTROSCOPY ;  OXIDE ;  REDUCTION ;  CELL
语种: 英语
WOS记录号: WOS:000071969500007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138192
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:
Jiang, Y,Wang, SZ,Zhang, YH,et al. Kinetic study of the formation of oxygen vacancy on lanthanum manganite electrodes[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,1998,145(2):373-378.
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