Pd-Ni双金属复合物修饰泡沫镍电极对水中4-氯酚的电化学脱氯  

Electrochemical dechlorination of 4-chlorophenol in aqueous solution using a palladium-nickel bimetallic composite catalyst supported on nickel foam

作　　者：宋爽[1] 林莉莉[1] 何志桥[1] 陈建孟[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032

出　　处：《化工学报》2009年第6期1554-1559,共6页CIESC Journal

基　　金：国家重点基础研究专项经费资助项目(2009CB421603);浙江省自然科学基金重点项目(Z5080207)~~

摘　　要：The electrocatalytic dechlorination of 4-chlorophenol(4-CP) in aqueous solution was studied by using a palladium-nickel bimetallic composite catalyst deposited on nickel foam(Pd-Ni/Ni foam) as the cathode.The Pd-Ni composite particles with a diameter of less than 50 nm were finely dispersed on the Ni foam surface.The Pd-Ni/Ni foam electrode exhibited higher dechlorination efficiency than single Pd or Ni supported on Ni foam electrodes.High-performance liquid chromatography analysis verified that phenol was the main dechlorination product.For an applied current of 20 mA,a bulk solution temperature of 15℃,and an initial 4-CP concentration of 1 mmol·L-1,dechlorination efficiency of 82% was observed.Based on electrochemical impedance spectroscopic results and the current efficiency of 4-CP dechlorination at different applied currents on various electrodes,the authors determined the rate-limiting step under various polarization conditions in the experiments.The electrocatalytic dechlorination of 4-chlorophenol （4-CP） in aqueous solution was studied by using a palladium-nickel bimetallic composite catalyst deposited on nickel foam （Pd-Ni/Ni foam） as the cathode. The Pd-Ni composite particles with a diameter of less than 50 nm were finely dispersed on the Ni foam surface. The Pd-Ni/Ni foam electrode exhibited higher dechlorination efficiency than single Pd or Ni supported on Ni foam electrodes. High-performance liquid chromatography analysis verified that phenol was the main dechlorination product. For an applied current of 20 mA, a bulk solution temperature of 15℃, and an initial 4-CP concentration of 1 mmol · L^-1, dechlorination efficiency of 82% was observed. Based on electrochemical impedance spectroscopic results and the current efficiency of 4-CP dechlorination at different applied currents on various electrodes, the authors determined the rate-limiting step under various polarization conditions in the experiments.

关 键 词：钯镍复合物 电催化 4-氯酚 脱氯 

分 类 号：O646[理学—物理化学] X703[理学—化学]