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Manganese oxide-graphene composite as an efficient catalyst for 4-electron reduction of oxygen in alkaline media | |
Wu, Jiajia1,2![]() ![]() | |
2012-07-30 | |
发表期刊 | ELECTROCHIMICA ACTA
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ISSN | 0013-4686 |
卷号 | 75页码:305-310 |
文章类型 | Article |
摘要 | The catalytic activity of manganese oxide (MnOx)-graphene composite prepared by a physical method towards oxygen (O-2) reduction reaction in 0.1 M KOH solution has been investigated. For a better performance, MnOx materials with different crystallographic structures and morphologies have been synthesized, and their catalytic properties and stability for O-2 reduction are evaluated with linear sweep voltammetry and current-time chronoamperometry. The results show that the catalytic activity decreases in the sequence: alpha-MnO2 nanowire > amorphous MnOx nanoparticle > beta-MnO2 microprism, and alpha-MnO2 nanowire is more stable than amorphous MnOx nanoparticle. Thus, alpha-MnO2 nanowire is selected to combine with graphene. The modification of graphene on GC electrode leads to ca. 130 mV positive shift of the half-wave potential for the reduction of O-2 to peroxide (HO2-), and further introduction of alpha-MnO2 nanowire catalyzes the disproportionation of HO2- produced effectively, which enables 4-electron reduction of O-2 at low overpotential. In addition, the composite possesses good durability. (C) 2012 Published by Elsevier Ltd. |
关键词 | Oxygen Reduction Reaction Catalyst Manganese Oxide-graphene Composite Catalytic Mechanism |
学科领域 | Electrochemistry |
DOI | 10.1016/j.electacta.2012.05.005 |
URL | 查看原文 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000306884100040 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qdio.ac.cn/handle/337002/12475 |
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, Shandong Prov Key Lab Corros Sci, Inst Oceanol, Qingdao 266071, Peoples R China. |
作者单位 | 1.Chinese Acad Sci, Shandong Prov Key Lab Corros Sci, Inst Oceanol, 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. Manganese oxide-graphene composite as an efficient catalyst for 4-electron reduction of oxygen in alkaline media[J]. ELECTROCHIMICA ACTA,2012,75:305-310. |
APA | Wu, Jiajia,Zhang, Dun,Wang, Yi,Wan, Yi,&Zhang, D .(2012).Manganese oxide-graphene composite as an efficient catalyst for 4-electron reduction of oxygen in alkaline media.ELECTROCHIMICA ACTA,75,305-310. |
MLA | Wu, Jiajia,et al."Manganese oxide-graphene composite as an efficient catalyst for 4-electron reduction of oxygen in alkaline media".ELECTROCHIMICA ACTA 75(2012):305-310. |
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