The reduction reaction kinetics of vanadium(V) in acidic solutions on a platinum electrode with unusual difference compared to carbon electrodes

doi:10.1016/j.electacta.2018.07.071

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	The reduction reaction kinetics of vanadium(V) in acidic solutions on a platinum electrode with unusual difference compared to carbon electrodes
	Wang, Wenjun; Fan, Xinzhuang; Qin, Ye; Liu, Jianguo; Yan, Chuanwei; Zeng, Chaoliu
刊名	ELECTROCHIMICA ACTA
	2018-09-01
卷号	283 页码:1313-1322
关键词	Vanadium redox flow battery VO2+/VO2+ redox couple Reduction mechanism Carbon Platinum
ISSN号	0013-4686
DOI	10.1016/j.electacta.2018.07.071
通讯作者	Wang, Wenjun(wjwang10s@imr.ac.cn) ; Zeng, Chaoliu(clzeng@imr.ac.cn)
英文摘要	With the consideration of understanding the interplays between the electrolyte and electrode for the V0+(2)/V0(2+) redox reactions at various electrodes and developing high-activity electrode materials for an all-vanadium redox flow battery, the reduction reaction kinetics of vanadium(V) ions on a platinum (Pt) electrode in comparison with that on carbon electrodes is investigated by steady-state potentiodynamic polarization and impedance spectroscopy measurements in sulfuric acid solutions with various pH and vanadium concentrations. No abnormal increase is observed neither in the cathodic Tafel slope nor the charge transfer resistance (R-ct) at a transition potential (E-k) on the Pt electrode. However, an abrupt change in the Tafel slope and R-ct of vanadium(V) ions is observed on carbon electrodes. The above results indicate that the reduction reaction kinetics of vanadium(V) ions in acidic solutions on the Pt electrode show some unusual difference with that on carbon electrodes, and this is the first study to report such a new phenomenon. Additionally, possible mechanism pathways for the reduction reaction of vanadium (V) ions in acidic solutions are proposed for the above-mentioned carbon and Pt electrodes in this work. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[21573257]
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000441077900143
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129135]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Wenjun; Zeng, Chaoliu
作者单位	Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, 62 Wencui Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Wenjun,Fan, Xinzhuang,Qin, Ye,et al. The reduction reaction kinetics of vanadium(V) in acidic solutions on a platinum electrode with unusual difference compared to carbon electrodes[J]. ELECTROCHIMICA ACTA,2018,283:1313-1322.
APA	Wang, Wenjun,Fan, Xinzhuang,Qin, Ye,Liu, Jianguo,Yan, Chuanwei,&Zeng, Chaoliu.(2018).The reduction reaction kinetics of vanadium(V) in acidic solutions on a platinum electrode with unusual difference compared to carbon electrodes.ELECTROCHIMICA ACTA,283,1313-1322.
MLA	Wang, Wenjun,et al."The reduction reaction kinetics of vanadium(V) in acidic solutions on a platinum electrode with unusual difference compared to carbon electrodes".ELECTROCHIMICA ACTA 283(2018):1313-1322.