The redox behavior of vanadium in alkaline solutions by cyclic voltammetry method

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	The redox behavior of vanadium in alkaline solutions by cyclic voltammetry method
	Liu, Biao 1,2; Zheng, Shili 1; Wang, Shaona 1; Zhang, Yi 1; Ortega, Ada 3; Kim, Nam Soo 3; Han, Kenneth 4; Du, Hao 1
刊名	ELECTROCHIMICA ACTA
	2012-08-01
卷号	76 期号:0 页码:262-269
关键词	Redox behavior Vanadium Alkaline solutions Cyclic voltammetry
ISSN号	0013-4686
通讯作者	Du, H
英文摘要	The redox behavior of vanadate ions in alkaline solutions has been studied with NaOH concentration ranging from 0.1 M to 1 M. The cyclic voltammetry results reveal that vanadate ions are irreversibly reduced to V(OH)(2) via a three-electron transfer reaction, and the first electron transfer reaction is the rate-determining step. The oxidation processes involve the stepwise oxidation of V(OH)(2) to V(OH)(3), and V(OH)(3) to vanadate ions. The reduction kinetics is discussed and the diffusion coefficient of vanadate ion is calculated to be 1.40 x 10(-9) m(2)/s. Chemical and XPS analysis results suggest that due to the instability of the direct reduction product V(OH)(2), the obtained deposits after reducing electrolysis are mixed-valence (+3/+4) vanadium compounds with an empirical compound formula of VO1.87 center dot 1.38H(2)O. X-ray diffraction and TGA/DSC analysis results further confirm that the collected reducing electrolysis products are amorphous hydrated vanadium compounds. (C) 2012 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Electrochemistry
研究领域[WOS]	Electrochemistry
关键词[WOS]	ELECTROCHEMICAL-BEHAVIOR ; AQUEOUS-SOLUTIONS ; FLOW BATTERY ; ELECTRODE ; IONS ; ELECTROREDUCTION ; CELL ; PH ; POLARIZATION ; MECHANISM
收录类别	SCI
语种	英语
WOS记录号	WOS:000306621200034
公开日期	2013-10-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/3543]
专题	过程工程研究所_湿法冶金清洁生产技术国家工程实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Univ Texas El Paso, Dept Met & Mat Engn, El Paso, TX 79968 USA 4.Seo Kyeong Univ, KEN Res Ctr, Seoul 136704, South Korea
推荐引用方式 GB/T 7714	Liu, Biao,Zheng, Shili,Wang, Shaona,et al. The redox behavior of vanadium in alkaline solutions by cyclic voltammetry method[J]. ELECTROCHIMICA ACTA,2012,76(0):262-269.
APA	Liu, Biao.,Zheng, Shili.,Wang, Shaona.,Zhang, Yi.,Ortega, Ada.,...&Du, Hao.(2012).The redox behavior of vanadium in alkaline solutions by cyclic voltammetry method.ELECTROCHIMICA ACTA,76(0),262-269.
MLA	Liu, Biao,et al."The redox behavior of vanadium in alkaline solutions by cyclic voltammetry method".ELECTROCHIMICA ACTA 76.0(2012):262-269.