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Citation: MA Li-Wen, CHEN Bai-Zhen, HE Xin-Kuai. Mechanismof Cr(III) Electrodeposition in Carboxylic Acid-Urea System[J]. Acta Physico-Chimica Sinica, ;2007, 23(10): 1607-1611. doi: 10.3866/PKU.WHXB20071022 shu

Mechanismof Cr(III) Electrodeposition in Carboxylic Acid-Urea System

1.
School of Metallurgical Science and Engineering , Central South University, Changsha 410083, P. R. China; School of Packaging and Printing, Hunan University of Technology, Zhuzhou 412008, Hunan Province, P. R. China

Received Date: 5 March 2007
Available Online: 28 August 2007

Cyclic voltammetry, steady polarization and alternating current impedance were used to study the mechanism of Cr(III) electrodeposition in carboxylic acid-urea system. The results indicated that the trivalent chromium ion t three electrons by two steps in which one electron was t firstly and two secondly. The two steps were all nonreversible reductions with chemical transformation. The kinetic parameters, such as reaction orders, Tafel slopes and apparent transfer coefficients calculated from the theoretical kinetics equation were agreed well with the experimentally measured ones.
- Trivalent chromium; Carboxylic acid; Urea; Mechanism; Kinetics equation
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