Electrochemical degradation of pentachlorophenol using a palladium modified gas-diffusion electrode
Pd/C catalyst was prepared by hydrogen reduction method and used for the Pd/C gas-diffusion electrode.It was characterized by cyclic voltammetry(CV)technique.The electrochemical degradation of pentachlorophenol(PCP)was investigated in a diaphragm electrolysis device,feeding firstly with hydrogen gas then with air using the Pd/C gas-diffusion electrode and the carbon/polytetrafluoroethylene (C/PTFE)gas-diffusion electrode as the cathode,respectively.The results indicated that the Pd,C gas-diffusion cathode can not only reducfively dechlorinate PCP by feeding hydrogen gas.but also accelerate the two-electron reduction of O2 to hydrogen peroxide(H2O2)by feeding air.Therefore,both the removal efficiency and the dechlorination degree of PCP exceeded 80％after 120 min.and the average removal efficiency of PCP in terms of total organic carbon(TOCl exceeds 75％after 200 min by using Pd/C gas-diflusion cathode.which was better than that of the C,PTFE gas-diffusion cathode.High-performance liquid chromatography(HPLC)allows identifying phenol as the dechlorination product.
chlorophenol electrochemical oxidation gas-diffusion cathode Pd／C catalyst priority pollutant
Hui WANG Jian Long WANG
School of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China Laboratory of Environmental Technology,Institute of Nuclear and New Energy Technology,Tsinghua Unive
国际会议
西安
英文
823-831
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）