Electrocatalytic degradation of 4-chlorophenol on F-doped PbO(2) anodes

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	Electrocatalytic degradation of 4-chlorophenol on F-doped PbO(2) anodes
	J. L. Cao; H. Y. Zhao; F. H. Cao; J. Q. Zhang; C. N. Cao
	2009
发表期刊	Electrochimica Acta
ISSN	0013-4686
卷号	54 期号:9 页码:2595-2602
摘要	PbO(2) and F-doped PbO(2) (F-PbO(2)) anodes have been prepared by a standard thermal decomposition-electrodeposition technique. The electrochemical stability of these anodes has been investigated by the accelerated life tests in sulphuric acid solution. The results show that the service life of the F-PbO(2) anodes is almost three times longer than that of the PbO(2) anodes. Furthermore, in the degradation of 4-chlorophenol (4-CP), the F-PbO(2) anodes give a higher degradation rate than that observed for the PbO(2) anodes. The influence of F(-) anion doping on the stability and activity of PbO(2) anodes has been discussed. With the F-PbO(2) anodes, the degradation of 4-CP is investigated according to the results of high-performance liquid chromatograph (HPLC), ionic chromatograph (IC) and cyclic voltammetry (CV). In addition, the electron spin resonance(ESR) technique using 5,5-dimethyl-1-pyrroline-N-oxide (DMPO)as the spin-trap reagent has been applied to detect free radical intermediates generated during in situ the electrocatalytic degradation of aqueous 4-CP on the F-PbC2 anodes. ESR measurements give the direct evidence that the active species (*OH) are responsible for the decomposition of 4-CP over F-PbO(2) under anodic bias potential, strongly suggesting that the electrocatalytic degradation of most organic compounds on F-PbO(2) anodes proceed via surface intermediates of water oxidation, not via direct oxidation at electrode surface. The formation mechanism of surface intermediates is also discussed. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属	[cao, jianglin] tongji univ, coll environm sci & engn, state key lab pollut control & resource reuse, shanghai 200092, peoples r china. [zhao, haiyan] hebei univ sci & technol, coll sci, shijiazhuang 050018, peoples r china. [cao, fahe; zhang, jianqing; cao, chunan] zhejiang univ, dept chem, hangzhou 310027, peoples r china. [zhang, jianqing; cao, chunan] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;cao, jl (reprint author), tongji univ, coll environm sci & engn, state key lab pollut control & resource reuse, siping rd 1239, shanghai 200092, peoples r china;jlcao@tongji.edu.cn
关键词	Pbo(2) F-doped Pbo(2) Electrocatalytic Degradation 4-chlorophenol Electron Spin Resonance Lead Dioxide Electrode Electrochemical Oxidation Waste-water Physicochemical Properties Oxygen Evolution Aqueous-solution Ozone Acid Incineration Behavior
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31815
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. L. Cao,H. Y. Zhao,F. H. Cao,et al. Electrocatalytic degradation of 4-chlorophenol on F-doped PbO(2) anodes[J]. Electrochimica Acta,2009,54(9):2595-2602.
APA	J. L. Cao,H. Y. Zhao,F. H. Cao,J. Q. Zhang,&C. N. Cao.(2009).Electrocatalytic degradation of 4-chlorophenol on F-doped PbO(2) anodes.Electrochimica Acta,54(9),2595-2602.
MLA	J. L. Cao,et al."Electrocatalytic degradation of 4-chlorophenol on F-doped PbO(2) anodes".Electrochimica Acta 54.9(2009):2595-2602.