Efficient electrochemical reduction of bromate by a Pd/rGO/CFP electrode with low applied potentials

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Efficient electrochemical reduction of bromate by a Pd/rGO/CFP electrode with low applied potentials
	Mao, Ran ; Zhao, Xu ; Lan, Huachun ; Liu, Huijuan ; Qu, Jiuhui
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2014
卷号	160 期号:1 页码:179-187
关键词	Electrochemical reduction Bromate removal Pd/rGO/CFP electrode Low applied potential
ISSN号	0926-3373
中文摘要	The reduced graphene oxide/carbon fiber paper (rGO/CFP) composites are synthesized by in situ chemical reduction method, and then Pd nanoparticles are supported on the rGO/CFP via an electrodeposition process to obtain a novel Pd/rGO/CFP cathode, which is used for bromate (BrO3-) electroreduction. Pd particles are fairly well dispersed on the rGO nanosheets with a mean size of 6.7 nm. With the Pd/rGO/CFP electrode, the removal efficiency of BrO3- is up to 98.7% within 60 min at -0.5 V; the BrO3- reduction follows pseudo-first-order kinetics with the rate constant of 0.105 min(-1), which is much higher than that of CFP, Pd/CFP or rGO/CFP electrode. The rate constant is largely increased from 0.001 to 0.105 min(-1) upon lowering the cathode potential from 0 to -0.5 V, and is slightly decreased at more negative potentials. At -0.5V, the reduction rate is significantly enhanced at low pH, while at -1.5V, the pH effect is reduced. Within the concentration of GO precursor from 0.5 to 2.0 mg/mL, the as-prepared Pd/rGO/CFP electrode exhibits high and stable electrocatalytic activity. The rGO sheets shorten the effective lengths for electron transfer in the electroreduction of H2O/H+ to produce atomic H* for the indirect reduction of BrO3- to Br-. Accordingly, a high removal efficiency can be achieved with the applied potential as low as 0.5 V, which is less negative than that for H-2 evolution. Due to the strong interaction between surface oxides of rGO and Pd, the high stability of the composite film electrode is exhibited. (C) 2014 Published by Elsevier B.V.
WOS记录号	WOS:000340687900021
公开日期	2015-03-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9536]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Mao, Ran,Zhao, Xu,Lan, Huachun,et al. Efficient electrochemical reduction of bromate by a Pd/rGO/CFP electrode with low applied potentials[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2014,160(1):179-187.
APA	Mao, Ran,Zhao, Xu,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2014).Efficient electrochemical reduction of bromate by a Pd/rGO/CFP electrode with low applied potentials.APPLIED CATALYSIS B-ENVIRONMENTAL,160(1),179-187.
MLA	Mao, Ran,et al."Efficient electrochemical reduction of bromate by a Pd/rGO/CFP electrode with low applied potentials".APPLIED CATALYSIS B-ENVIRONMENTAL 160.1(2014):179-187.