Effects of ultrasound on electrochemical oxidation mechanisms of   p-substituted phenols at BDD and PbO2 anodes

doi:10.1016/j.electacta.2010.04.072

CORC > 北京大学 > 环境科学与工程学院

	Effects of ultrasound on electrochemical oxidation mechanisms of p-substituted phenols at BDD and PbO2 anodes
	Zhu, Xiuping ; Ni, Jinren ; Li, Hongna ; Jiang, Yi ; Xing, Xuan ; Borthwick, Alistair G. L.
刊名	电化学学报
	2010
关键词	Electrochemical oxidation Ultrasound Boron-doped diamond electrode PbO2 electrode p-Substituted phenols BORON-DOPED DIAMOND WASTE-WATER TREATMENT ELECTRODES DEGRADATION 4-CHLOROPHENOL INCINERATION 2-NAPHTHOL ELECTROCATALYSIS ELECTROLYSIS THIOSULFATE
DOI	10.1016/j.electacta.2010.04.072
英文摘要	The effects of low-frequency (40 kHz) ultrasound are investigated with regard to the effectiveness and mechanisms of electrochemical oxidation of p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) at BDD (boron-doped diamond) and PbO2 anodes. Although ultrasound improved the disappearance rates of p-substituted phenols at both the BDD and PbO2 anodes, the degree of enhancement varied according to the type of p-substituted phenol and type of anode under consideration. At the BDD anode, the % Increase values were in the range 73-83% for p-substituted phenol disappearance and in the range 60-70% for COD removal. However, at the PbO2 anode, the corresponding %Increase values were in the range 50-70% for disappearance of p-substituted phenols and only 5-25% for COD removal, much lower values than obtained at the BDD anode. Further investigations on the influence of ultrasound on the electrochemical oxidation mechanisms at BDD and PbO2 anodes revealed that the different increase extent were due to the specialized electrochemical oxidation mechanisms at these two anodes. The hydroxyl radicals were mainly free at the BDD electrodes with a larger reaction zone, but adsorbed at the PbO2 electrodes with a smaller reaction zone. Therefore, the enhancement due to ultrasound was greater at the BDD anode than at the PbO2 anode. (C) 2010 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000280422800007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Electrochemistry; SCI(E); EI; 21; ARTICLE; 20; 5569-5575; 55
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158460]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhu, Xiuping,Ni, Jinren,Li, Hongna,et al. Effects of ultrasound on electrochemical oxidation mechanisms of p-substituted phenols at BDD and PbO2 anodes[J]. 电化学学报,2010.
APA	Zhu, Xiuping,Ni, Jinren,Li, Hongna,Jiang, Yi,Xing, Xuan,&Borthwick, Alistair G. L..(2010).Effects of ultrasound on electrochemical oxidation mechanisms of p-substituted phenols at BDD and PbO2 anodes.电化学学报.
MLA	Zhu, Xiuping,et al."Effects of ultrasound on electrochemical oxidation mechanisms of p-substituted phenols at BDD and PbO2 anodes".电化学学报 (2010).