Catalytic activity of graphene-cobalt hydroxide composite for oxygen reduction reaction in alkaline media
文献类型：期刊论文
| 作者 | Wu, Jiajia1,2 ; Zhang, Dun1; Wang, Yi1; Wan, Yi1,2; Hou, Baorong1
|
| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2012-01-15 |
| 卷号 | 198页码:122-126 |
| 关键词 | Oxygen reduction reaction Graphene Cobalt hydroxide Rotating ring-disk electrode Disproportionation |
| ISSN号 | 0378-7753 |
| 通讯作者 | Zhang, D (reprint author), Chinese Acad Sci, Inst Oceanol, Shandong Prov Key Lab Corros Sci, Qingdao 266071, Peoples R China. |
| 英文摘要 | 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. |
| 学科主题 | Electrochemistry ; Energy & Fuels |
| 收录类别 | SCI |
| 原文出处 | 10.1016/j.jpowsour.2011.10.007 |
| 语种 | 英语 |
| WOS记录号 | WOS:000297890700019 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/12460]  |
| 专题 | 海洋研究所_海洋腐蚀与防护研究发展中心 |
| 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 |
| 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.(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. |
入库方式： OAI收割
来源：海洋研究所
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