%0 Journal Article
%T Electrochemical Degradation of 4-Chlorophenol Using a Pd/MWNTs Catalytic Electrode<br>用于降解4-氯酚的载钯碳纳米管催化电极研究
%A WEI Xiang-ji
%A WANG Hui
%A BIAN Zhao-yong
%A LI Min
%A SUN De-zhi
%A <br>魏祥甲
%A 王辉
%A 卞兆勇
%A 李敏
%A 孙德智
%J 环境科学
%D 2011
%I 
%X Nitric acid in various volume fraction(8%, 15%, 20%, and 68%) was used on the multi-wall carbon nanotubes(MWNTs) pre-treatment and then the formaldehyde reduction method was utilized for the preparation the Pd/MWNTs catalysts which were fully characterized by Boehm titration method, X-ray diffraction(XRD), infrared spectroscopy, scanning electron microscopy(SEM), and cyclic voltammetry(CV) techniques. The electrochemical degradation of 4-chlorophenol was investigated in a diaphragm electrolysis system using the Pd/MWNTs gas-diffusion cathode. The results indicated that the active organic function groups increased on the surface of the carbon nanotube pre-treated by using 68% nitric acid. Pd particles with an average size of 9.2 nm were highly dispersed in the carbon nanotube with an amorphous structure. Additionally, the Pd/MWNTs catalyst in Pd/MWNTs gas-diffusion electrode system accelerated the two-electron reduction of O2 to hydrogen peroxide(H2O2) when feeding air. The Pd/MWNTs gas-diffusion cathode can not only reductively dechlorinate 4-chlorophenols by feeding hydrogen gas, but also accelerate the two-electron reduction of O2 to H2O2 by feeding air. Therefore, the removal efficiency and the average removal efficiency of 4-chlorophenol in terms of total organic carbon(TOC) reached about 86.9% and 71.6% after 140 min electrolysis, respectively.
%K electrochemical oxidation
%K Pd/MWNTs
%K catalytic cathode
%K 4-chlorophenol
%K priority pollutants<br>电化学氧化
%K Pd/MWNTs
%K 催化电极
%K 4-氯酚
%K 优先污染物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=D1920AB56F28E37CD209F27E02A6DAF3&yid=9377ED8094509821&vid=9971A5E270697F23&iid=F3090AE9B60B7ED1&sid=1860C81D5DA29ACB&eid=8ADA938592665B56&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=26