The Effect of Temperature on the Electrochemical Behavior of the V(IV)/V(V) Couple on a Graphite Electrode

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	The Effect of Temperature on the Electrochemical Behavior of the V(IV)/V(V) Couple on a Graphite Electrode
	H. J. Liu; Q. Xu; C. W. Yan; Y. Z. Cao; Y. L. Qiao
	2011
发表期刊	International Journal of Electrochemical Science
ISSN	1452-3981
卷号	6 期号:8 页码:3483-3496
摘要	The electrochemical behavior of the V(IV)/V(V) couple in an aqueous solution of 2 mol dm(-3) H(2)SO(4)+2 mol dm(-3) VOSO(4) on a graphite electrode at different temperatures is studied by steady-state polarization and electrochemical impedance spectroscopy. The results show that the diffusion coefficient (D) of V(IV) species increases from 1.60x10(-5) to 3.15x10(-5) cm(2) s(-1) with temperature from 15 to 70 degrees C and the activation energy for diffusion of V(IV) species is 10.52 kJ mol(-1). The anodic oxidation of V(IV) is a mixed kinetic-diffusion controlled process at the anodic polarization ranged from 32 to 132 mV vs. open circuit potential (OCP). The rate constant of charge transfer for the anodic oxidation of V(IV) increases from 1.2x10(-5) to 17.7x10(-5) cm s(-1) with temperature varied from 20 to 60 degrees C, and its activation energy is 52.4 kJ mol(-1).
部门归属	[liu hui-jun; xu qian; cao ya-zhe; qiao yong-lian] northeastern univ, sch mat sci & met, shenyang 110819, peoples r china. [yan chuan-wei] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;liu, hj (reprint author), northeastern univ, sch mat sci & met, shenyang 110819, peoples r china;qianxu201@mail.neu.edu.cn
关键词	Vanadium Redox Flow Battery Graphite Electrode Impedance Kinetic Parameter Activation Energy Redox Flow Battery Positive Half-cell Carbon Electrodes Impedance Mechanism State
URL	查看原文
WOS记录号	WOS:000297500700031
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30524
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. J. Liu,Q. Xu,C. W. Yan,et al. The Effect of Temperature on the Electrochemical Behavior of the V(IV)/V(V) Couple on a Graphite Electrode[J]. International Journal of Electrochemical Science,2011,6(8):3483-3496.
APA	H. J. Liu,Q. Xu,C. W. Yan,Y. Z. Cao,&Y. L. Qiao.(2011).The Effect of Temperature on the Electrochemical Behavior of the V(IV)/V(V) Couple on a Graphite Electrode.International Journal of Electrochemical Science,6(8),3483-3496.
MLA	H. J. Liu,et al."The Effect of Temperature on the Electrochemical Behavior of the V(IV)/V(V) Couple on a Graphite Electrode".International Journal of Electrochemical Science 6.8(2011):3483-3496.