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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2013,Vol.29>> Issue(05)>> 973-980     doi: 10.3866/PKU.WHXB201302283         中文摘要
ELECTROCHEMISTRY AND NEW ENERGY
Dechlorination of Benzenyltrichloride in CH3CN Solvent at a Silver Cathode
XU Ying-Hua, MA Hong-Xing, CAI Qian-Qian, ZHU Ying-Hong, MA Chun-An
State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou 310032, Zhejiang Province, P. R. China
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The reductive dechlorination mechanism of benzenyltrichloride at an Ag cathode was investigated using cyclic voltammetry (CV) and potentiostatic electrolysis, in CH3CN solvent containing 0.1 mol·L- tetrabutylammonium perchlorate (TBAP). The adsorption of Cl- generated during dechlorination was detected using wide anode region CV, based on its anodic reaction with Ag. The CV results indicated that: (1) Ag exhibited better electrocatalytic activity than Hg for the dechlorination; (2) the first reduction peak, which was divided from the reduction peak of benzenyltrichloride at -1.19 V (vs Ag/Ag+) when the scan rate was ≤50 mV·s-1, is an adsorption controlled process and its electron transfer occurred in a concerted way, and the electron transfer coefficient is approximately 0.25; (3) the potential region where departing Cladsorbed on Ag ranged from -0.75 to -1.75 V (vs Ag/Ag+ ). The electrolysis results indicated that dechlorination product selectivity was strongly dependent on the Ag electrode potential.



Keywords: Ag electrode   Reductive dechlorination   Dechlorination mechanism   Wide anode region CV   Adsorption of Cl-  
Received: 2013-01-11 Accepted: 2013-02-27 Publication Date (Web): 2013-02-28
Corresponding Authors: Email: science@zjut.edu.cn; xuyh@zjut.edu.cn

Fund: The project was supported by the National Natural Science Foundation of China (21106133) and National Key Basic Research Program of China (973) (2012CB722604).

Cite this article: XU Ying-Hua, MA Hong-Xing, CAI Qian-Qian, ZHU Ying-Hong, MA Chun-An. Dechlorination of Benzenyltrichloride in CH3CN Solvent at a Silver Cathode[J]. Acta Phys. -Chim. Sin., 2013,29 (05): 973-980.    doi: 10.3866/PKU.WHXB201302283

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