Unidirectional current flow of reversible redox couples on a MoO3 film-modified microelectrode

	Unidirectional current flow of reversible redox couples on a MoO3 film-modified microelectrode
	Wang BX ; Li XY ; Dong SJ
刊名	journal of electroanalytical chemistry
	1997
卷号	435 期号:1-2 页码:23-30
关键词	VALENT MOLYBDENUM OXIDES TUNGSTEN-OXIDE ELECTROCHEMICAL PREPARATION SEMICONDUCTOR ELECTRODES ELECTROCHROMIC MATERIALS ELECTRICAL-PROPERTIES ANODIC-OXIDATION THIN-FILMS WO3 DEVICES
ISSN号	0022-0728
中文摘要	in this paper, we have investigated the reactivity of the molybdenum oxide film toward some standard redox systems (e.g., ferrocene (fc) and its derivatives) and observed a few interesting phenomena. the results demonstrate that the electrochemical behaviour of fc and its derivatives at the oxide-modified carbon fiber (cf) microelectrode differs from that at a bare cf microelectrode, the conductivity of the molybdenum oxide film is seriously affected by the range and the direction of the potential scan, which influences the electrochemical behaviour of these redox systems at the film electrode. if the cycling potential is more positive than the reduction potential of the molybdenum oxide film, the reduction and oxidation peak currents of fc and its derivatives could not be observed. the result indicates that the molybdenum oxide film on a microelectrode surface cannot transfer electrons between the surface of the electrode and fc or its derivatives due to the existence of a high resistance between the interface in these potential ranges. on the other hand, if the lower limit of the scan potential was extended to a potential more negative than the reduction peak potential of the film, the oxidation peak of fc or its derivatives appeared at about the potential relative to e-0 of fc or its derivatives on the bare electrode, and the peak current is proportional to the concentration of these couples in the electrolyte. to our surprise, the peak height on the modified electrode is much larger than that on the bare cf microelectrode under the same conditions in the range of low concentration of these couples, and the oxidation peak potential of these couples is more negative than that on the bare cf microelectrode. on the basis of the experimental observation, we propose that these redox couples may undergo an interaction with the reduction state of the molybdenum oxide film. the new phenomena that we observed have been explained by using this interaction. (c) 1997 elsevier science s.a.
收录类别	SCI收录期刊论文
语种	英语
公开日期	2010-12-22 ; 2011-06-09
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/23897]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Wang BX,Li XY,Dong SJ. Unidirectional current flow of reversible redox couples on a MoO3 film-modified microelectrode[J]. journal of electroanalytical chemistry,1997,435(1-2):23-30.
APA	Wang BX,Li XY,&Dong SJ.(1997).Unidirectional current flow of reversible redox couples on a MoO3 film-modified microelectrode.journal of electroanalytical chemistry,435(1-2),23-30.
MLA	Wang BX,et al."Unidirectional current flow of reversible redox couples on a MoO3 film-modified microelectrode".journal of electroanalytical chemistry 435.1-2(1997):23-30.