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

doi:10.1016/j.jpowsour.2010.07.087

	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
	2011-02-01
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	196 期号:3 页码:1141-1144
文章类型	Article
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.
关键词	Oxygen Reduction Reaction Reduced Graphene Sheets Microbial Fuel Cell Catalysis Disproportionation
学科领域	Electrochemistry ; Energy & Fuels
DOI	10.1016/j.jpowsour.2010.07.087
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000284790200039
引用统计	被引频次：53[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/11463
专题	海洋环境腐蚀与生物污损重点实验室
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
第一作者单位	中国科学院海洋研究所
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.

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