Effect of sulfosalicylic acid on kinetics of Ce3+/Ce4+ electrode reaction

被引：11

作者：

Xie, Zhipeng ^{[1
]}

Xiong, Fengjiao ^{[1
]}

Zhou, Debi ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

来源：

MECHANICS, SOLID STATE AND ENGINEERING MATERIALS | 2011年 / 279卷

关键词：

Cyclic voltammetry; Rotating disc electrode; Redox flow battery; Cerium electrolyte; NITRIC-ACID; REDOX; OXIDATION; CE(III); MEDIA; CELL;

D O I：

10.4028/www.scientific.net/AMR.279.451

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of sulfosalicylic acid (SSA) on the electrochemical behaviour of Ce3+/Ce4+ redox couple was studied using voltammetry at stationary electrode and rotating disc electrode (RDE). When the SSA was added to the Ce3+/Ce4+ electrolyte there was change to the peak current and peak potential, i.e. the increase of peak current and the decrease of peak potential difference. The diffusion coefficient of Ce3+ is 6.5 x 10(-6) cm(2) s(-1) and the standard rate constant of the Ce3+/Ce4+ redox reaction is 3.2 x 10(-4) cm s(-1) the presence of SSA, which are all larger than that in the absence of SSA (3.6 x 10(-6) cm(2) s(-1), 2.0 x 104 cm s(-1)). Therefore, the SSA as the additive in the supporting electrolyte for a cerium redox flow battery (RFB) application will result in a high voltage efficiency and will satisfy an important requirement for a RFB electrolyte.

引用

页码：451 / 455

页数：5

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