Comparison Study of the Electrochemical Behavior of Vanadate in NaOH and KOH Solutions

被引：1

作者：

Liu, Biao ^{[1
,2
]}

Zheng, Shili ^{[1
]}

Liu, Huibin ^{[1
,2
]}

Du, Hao ^{[1
]}

Wang, Shaona ^{[1
]}

Chen, Donghui ^{[3
]}

Bai, Ruiguo ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China

[2] Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chengde Iron & Steel Grp Co Ltd, Hebei Iron & Steel Grp Co Ltd, Res Ctr Vanadium & Titanium Technol, Chengde 067102, Hebei, Peoples R China

来源：

ADVANCES IN METALLURGICAL AND MINING ENGINEERING | 2012年 / 402卷

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Redox mechanisms; vanadium; NOH and KOH; cyclic voltammetry; VANADIUM ELECTRODES; AQUEOUS-SOLUTIONS; ELECTROREDUCTION; POLARIZATION; MECHANISM; AMMONIA; WATER; IONS; CELL; PH;

D O I：

10.4028/www.scientific.net/AMR.402.66

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The redox behavior of vanadate ions at glassy carbon electrode in KOH solutions with concentration ranging from 0.1M to 1M had been studied using cyclic voltammetry method. It is found out that vanadate ions experience similar redox reactions in both NaOH and KOH solutions, which involve a single cathodic reduction and two oxidation reactions in one cyclic sweep. Nearly same currents are obtained under the same reaction conditions in both solutions. However, vanadate ions appear more difficult to be reduced in KOH solutions than in NaOH solutions, and the reduction reaction exhibits higher irreversibility. The reduction potential is influenced by vanadate ions concentration, and is more negative in KOH solutions. The reversibility of reduction reaction is greatly dependent on alkalinity, and the reduction potential obviously decreases with the increase of alkalinity in KOH solutions. However, only a slight decrease was observed in NaOH solution, which may be due to the fact that OH- exhibits higher activity in KOH solutions.

引用

页码：66 / +

页数：2

共 23 条

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