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题名: Highly active reduction of oxygen on a FeCo alloy catalyst encapsulated in pod-like carbon nanotubes with fewer walls
作者: Deng, Jiao1;  Yu, Liang1;  Deng, Dehui1;  Chen, Xiaoqi1;  Yang, Fan1;  Bao, Xinhe1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2013
DOI: 10.1039/c3ta13759g
卷: 1, 期:47, 页:14868-14873
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: Employing an alternative of the Pt-based electrocatalysts for oxygen reduction reaction (ORR) has become a major interest in the fundamental research of the polymer electrolyte membrane fuel cells (PEMFCs). The carbon-encapsulated metal catalyst, on which O-2 is readily activated by the electrons transferred from the metal to the carbon surface, has recently been demonstrated as a promising strategy to produce robust non-precious metal electrocatalysts. However, the thickness of carbon walls might affect the process of the electron transfer, and subsequently the ORR activity. It is thus vital to explore the influence of the carbon wall thickness on the ORR reactivity for further improvement in designing carbon-encapsulated non-precious metal catalysts for ORR. Herein, we report a novel FeCo alloy catalyst encapsulated in pod-like carbon nanotubes via introducing graphene nanosheets into the raw materials to tailor the carbon wall thickness. The ORR activity of these catalysts increases drastically with the decreased thickness of the carbon walls, which could be attributed to the enhanced adsorption of O-2 on the carbon surface upon decreasing the carbon wall thickness. These findings provide a route for the rational design of high-performance non-precious metal cathode catalysts in PEMFCs.
关键词[WOS]: HIGH ELECTROCATALYTIC ACTIVITY ;  PEM FUEL-CELLS ;  CATHODE CATALYST ;  GRAPHENE NANOSHEETS ;  ALKALINE-MEDIUM ;  NANOPARTICLES ;  PERFORMANCE ;  COMPLEXES ;  SULFUR ;  GROWTH
语种: 英语
WOS记录号: WOS:000326984500007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137963
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Deng, Jiao,Yu, Liang,Deng, Dehui,et al. Highly active reduction of oxygen on a FeCo alloy catalyst encapsulated in pod-like carbon nanotubes with fewer walls[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(47):14868-14873.
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