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学科主题: 物理化学
题名: The key role of metal dopants in nitrogen-doped carbon xerogel for oxygen reduction reaction
作者: Liu, Sisi1, 2;  Deng, Chengwei1, 2;  Yao, Lan1, 2;  Zhong, Hexiang1;  Zhang, Huamin1
通讯作者: 钟和香 ;  张华民
关键词: Nitrogen doped xerogel ;  Metal effect ;  Non-noble metal catalyst ;  Fuel cell
刊名: JOURNAL OF POWER SOURCES
发表日期: 2014-12-10
DOI: 10.1016/j.jpowsour.2014.06.148
卷: 269, 期:1, 页:225-235
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: Highly active non-precious metal catalysts based on nitrogen-doped carbon xerogel (NCX) for the oxygen reduction reaction (ORR) is prepared with resorcinol(R)-formaldehyde (F) resin as carbon precursor and NH3 as nitrogen source. NCX samples doped with various transition metal species are investigated to elucidate the effect of transition metals on the structure and ORR activity of the products. As-prepared NCX catalysts with different metals are characterized using nitrogen-adsorption analysis, X-ray diffractometry, X-ray photoelectron spectroscopy, and Raman spectroscopy. The structural properties and ORR activities of the catalysts are altered by addition of different metals, and NO( doped with iron exhibits the best ORR activity. Metal doping evidently promotes the formation of more micropores and mesopores. Raman and XPS studies reveal that iron, cobalt, and nickel can increase pyridinic-N contents and that iron can catalyse the formation of graphene structures and enhance quaternary-N contents. Whereas the total N-content does not determine ORR activity, Metal-N-4/C-like species generated from the interaction of the metals with nitrogen and carbon atoms play important roles in achieving high ORR activity. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: PEM FUEL-CELLS ;  HIGH ELECTROCATALYTIC ACTIVITY ;  FE-BASED CATALYSTS ;  ACTIVE-SITES ;  NANOFIBER ELECTRODES ;  COMPOSITE CATALYSTS ;  CATHODE CATALYSTS ;  FE/N/C CATALYSTS ;  HEAT-TREATMENT ;  SURFACE-AREA
语种: 英语
WOS记录号: WOS:000340975200031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143927
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, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Energy Storage, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Liu, Sisi,Deng, Chengwei,Yao, Lan,et al. The key role of metal dopants in nitrogen-doped carbon xerogel for oxygen reduction reaction[J]. JOURNAL OF POWER SOURCES,2014,269(1):225-235.
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