Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media

doi:10.1016/j.jpowsour.2010.07.087

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	Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media
	Wu, Jiajia1,2 ; Wang, Yi1 ; Zhang, Dun 1; Hou, Baorong 1; Zhang, D (reprint author), Chinese Acad Sci, Key Lab Corros Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China
刊名	JOURNAL OF POWER SOURCES
	2011-02-01
卷号	196 期号:3 页码:1141-1144
关键词	Oxygen Reduction Reaction Reduced Graphene Sheets Microbial Fuel Cell Catalysis Disproportionation
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2010.07.087
文献子类	Article
英文摘要	Reduced graphene sheets (RGSs) were prepared via chemical reduction of graphite oxide and their morphology was characterized by atomic force microscopy. The electrochemical reduction of oxygen (O(2)) was RGSs was studied by cyclic, rotating disk electrode, and rotating ring-disk electrode voltammetry using the RGSs-modified glassy carbon (RGSs/GC) electrode in 3.5% NaCl solution. The results show that O(2) reduction undergoes three steps at the RGSs/GC electrode: electrochemical reduction of O(2) to H(2)O(2) mediated by quinone-like groups on the RGSs surface, a direct 2-electron reduction of O(2), and reduction of the H(2)O(2) produced to H(2)O. The modification of RGSs results in an obvious positive shift of the peak potential and a larger current density. The kinetics study shows that the number of electrons transferred for O(2) reduction can reach to 3.0 at pontentials of the first reduction step, indicating RGSs can effectively catalyze the disproportionation of H(2)O(2). Such catalytic activity of RGSs enables a 4-electron reduction of O(2) at a relatively low overpontential in neutral media. RGSs are a pontential electrode material for microbial fuel cells. (C) 2010 Elsevier B.V. All rights reserved.; Reduced graphene sheets (RGSs) were prepared via chemical reduction of graphite oxide and their morphology was characterized by atomic force microscopy. The electrochemical reduction of oxygen (O(2)) was RGSs was studied by cyclic, rotating disk electrode, and rotating ring-disk electrode voltammetry using the RGSs-modified glassy carbon (RGSs/GC) electrode in 3.5% NaCl solution. The results show that O(2) reduction undergoes three steps at the RGSs/GC electrode: electrochemical reduction of O(2) to H(2)O(2) mediated by quinone-like groups on the RGSs surface, a direct 2-electron reduction of O(2), and reduction of the H(2)O(2) produced to H(2)O. The modification of RGSs results in an obvious positive shift of the peak potential and a larger current density. The kinetics study shows that the number of electrons transferred for O(2) reduction can reach to 3.0 at pontentials of the first reduction step, indicating RGSs can effectively catalyze the disproportionation of H(2)O(2). Such catalytic activity of RGSs enables a 4-electron reduction of O(2) at a relatively low overpontential in neutral media. RGSs are a pontential electrode material for microbial fuel cells. (C) 2010 Elsevier B.V. All rights reserved.
学科主题	Electrochemistry ; Energy & Fuels
URL标识	查看原文
语种	英语
WOS记录号	WOS:000284790200039
公开日期	2012-07-03
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/11464]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Zhang, D (reprint author), Chinese Acad Sci, Key Lab Corros Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China
作者单位	1.Chinese Acad Sci, Key Lab Corros Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wu, Jiajia,Wang, Yi,Zhang, Dun,et al. Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media[J]. JOURNAL OF POWER SOURCES,2011,196(3):1141-1144.
APA	Wu, Jiajia,Wang, Yi,Zhang, Dun,Hou, Baorong,&Zhang, D .(2011).Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media.JOURNAL OF POWER SOURCES,196(3),1141-1144.
MLA	Wu, Jiajia,et al."Studies on the electrochemical reduction of oxygen catalyzed by reduced graphene sheets in neutral media".JOURNAL OF POWER SOURCES 196.3(2011):1141-1144.