Citation: 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 Physico-Chimica Sinica, ;2013, 29(05): 973-980. doi: 10.3866/PKU.WHXB201302283 shu

Dechlorination of Benzenyltrichloride in CH₃CN Solvent at a Silver Cathode

1.
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

Received Date: 11 January 2013
Available Online: 28 February 2013
Fund Project: 国家自然科学基金(21106133) (21106133)国家重点基础研究发展规划项目(973) (2012CB722604)资助 (973) (2012CB722604)

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.
- Ag electrode,
- Reductive dechlorination,
- Dechlorination mechanism,
- Wide anode region CV,
- Adsorption of Cl^-
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沈阳化工大学材料科学与工程学院沈阳 110142

Dechlorination of Benzenyltrichloride in CH3CN Solvent at a Silver Cathode

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通讯作者: 陈斌, bchen63@163.com

Dechlorination of Benzenyltrichloride in CH₃CN Solvent at a Silver Cathode