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	On the criteria of instability for electrochemical systems
	Li, ZL ; Li ZL(李则林) ; Ren, B ; Ren B(任斌) ; Niu, ZJ ; Niu ZJ(牛振江) ; Xiao, XM ; Xiao XM(肖小明) ; Zeng, Y ; Ceng Y(曾跃) ; Tian, ZQ ; Tian ZQ(田中群)
	2002
关键词	electrochemical oscillations criteria for instability cyclic voltammograms impedance spectroscopy C-1 organic molecules ferricyanide
英文摘要	Both cyclic-voltammetry-based and impedance-based experimental criteria that have been developed recently for the oscillatory electrochemical systems are critically appraised with two typical categories of oscillators. Consistent conclusions can be drawn by the two criteria for the category of oscillators that involve the coupling of charge transfer mainly with surface steps (e. g. ad- and desorption) such as in the electrooxidation of C, organic molecules. Whereas, impedance-based criterion is not applicable to the category of oscillators that involve the coupling of charge transfer mainly with mass transfer ( e. g. diffusion and convection) such as in the Fe(CN)(6)(3-) reduction accompanying periodic hydrogen evolution. The mason is that the negative impedance cannot include the feedback information of convection mass transfer induced by the hydrogen evolution. However, both positive and negative nonlinear feedbacks, i. e., the diffusion-limited depletion and convection-enhanced replenishment of the Fe(CN)(6)(3-) surface concentration, that coexist between the bistability, i. e., Fe(CN)(6)(3-) reduction With and without hydrogen evolution at lower and higher potential sides respectively, are all reflected in the crossed cyclic voltammogram (CCV). It can be concluded that the voltammetry-based criterion (in time domain) Is more intuitive, less time-consuming and has a wider range of applications than the impedance-based one (in frequency domain).
语种	中文
出版者	SCIENCE CHINA PRESS
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/12360]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Li, ZL,Li ZL,Ren, B,et al. On the criteria of instability for electrochemical systems[J],2002.
APA	Li, ZL.,李则林.,Ren, B.,任斌.,Niu, ZJ.,...&田中群.(2002).On the criteria of instability for electrochemical systems..
MLA	Li, ZL,et al."On the criteria of instability for electrochemical systems".(2002).

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