Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media

doi:10.1016/j.jpowsour.2011.10.007

	Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media
	Wu, Jiajia1,2 ; Zhang, Dun 1; Wang, Yi1 ; Wan, Yi 1,2; Hou, Baorong 1; Zhang, D (reprint author), Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China.
	2012-01-15
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	198 页码:122-126
文章类型	Article
摘要	The electrocatalysis of graphene-cobalt hydroxide (Co(OH)(2)) composite towards oxygen reduction reaction (ORR) in 0.1 M KOH is studied with Co(OH)(2)/graphene-modified glassy carbon (GC) electrode using cyclic and rotating ring-disk electrode voltammetry. The electrode is prepared by casting of graphene suspension on GC electrode and subsequent electrodeposition of Co(OH)(2) from Co(NO(3))(2) solution. A characteristic interlaced nanowalls morphology is observed for Co(OH)(2) with scanning electron microscopy. Raman spectra demonstrate the microstructure of graphene changes during electrochemical treatment in nitrate solutions, which has a great impact on its catalysis towards ORR. At GC electrode, two reduction processes both attributed to 2-electron reduction are recorded for ORR. The presence of Co(OH)(2) on GC electrode results in larger peak current without obvious potential shift due to its good catalytic activity towards the disproportionation of intermediates. Graphene not only increases the peak current and shifts the peak potential in the positive direction, but also leads to further reduction of HO(2)(-) at the second step. After electrochemical treatment in nitrate solutions, graphene is activated to catalyze the disproportionation of HO(2)(-) effectively, and its cooperation with Co(OH)(2) enables reduction of O(2) to OH(-) at lower overpotential. Graphene-Co(OH)(2) composite is a potential electrode material for air cathodes in alkaline electrolyte electrochemical systems. (C) 2011 Elsevier B.V. All rights reserved.
关键词	Oxygen Reduction Reaction Graphene Cobalt Hydroxide Rotating Ring-disk Electrode Disproportionation
学科领域	Electrochemistry ; Energy & Fuels
DOI	10.1016/j.jpowsour.2011.10.007
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000297890700019
引用统计	被引频次：95[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/337002/12460
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, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, 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,Zhang, Dun,Wang, Yi,et al. Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media[J]. JOURNAL OF POWER SOURCES,2012,198:122-126.
APA	Wu, Jiajia,Zhang, Dun,Wang, Yi,Wan, Yi,Hou, Baorong,&Zhang, D .(2012).Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media.JOURNAL OF POWER SOURCES,198,122-126.
MLA	Wu, Jiajia,et al."Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media".JOURNAL OF POWER SOURCES 198(2012):122-126.

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