Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions

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	Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions
	W. J. Wang; X. Z. Fan; J. G. Liu; C. W. Yan; C. L. Zeng
	2014
发表期刊	Rsc Advances
ISSN	2046-2069
卷号	4 期号:61 页码:32405-32411
摘要	The temperature-related reaction kinetics of the VO2+/VO2+ redox couple on a graphite electrode in sulfuric acid solutions has been investigated by cyclic voltammetry and chronopotentiometry for a better understanding of positive half-cell in a practical vanadium redox flow battery (VRFB). Elevated temperature facilitates the VO2+/ VO2+ redox reaction but without significant effect on its reversibility, and the reaction rate constants are calculated to be in the order of 10(-3) cm s(-1). In addition, the diffusion coefficient of both VO2+ and VO2+ ions tends to increase with increasing temperature with a diffusion activation energy of 4.24 kJ mol(-1) for VO2+ and 25.2 kJ mol(-1) for VO2 (+). On this basis, two diffusion equations for both VO2+ and VO2+ ions in sulfuric acid solutions have been established.
部门归属	[wang, wenjun ; fan, xinzhuang ; liu, jianguo ; yan, chuanwei ; zeng, chaoliu] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; fan, xz (reprint author), chinese acad sci, inst met res, 62 wencui rd, shenyang 110016, peoples r china. ; xzfan@imr.ac.cn
关键词	Graphite Electrode Materials Flow Battery Application Electrochemical-behavior Carbon Electrodes v(Iv)/v(v) vo2+/vo2+ Mechanism Storage Cell
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73425
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Wang,X. Z. Fan,J. G. Liu,et al. Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions[J]. Rsc Advances,2014,4(61):32405-32411.
APA	W. J. Wang,X. Z. Fan,J. G. Liu,C. W. Yan,&C. L. Zeng.(2014).Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions.Rsc Advances,4(61),32405-32411.
MLA	W. J. Wang,et al."Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions".Rsc Advances 4.61(2014):32405-32411.