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学科主题: 物理化学
题名: Nitrogen-doped hierarchically porous carbon as efficient oxygen reduction electrocatalysts in acid electrolyte
作者: Zhong, Hexiang1;  Deng, Chengwei1, 2;  Qiu, Yanling1;  Yao, Lan1, 2;  Zhang, Huamin1
通讯作者: 钟和香 ;  张华民
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2014-10-28
DOI: 10.1039/c4ta03778b
卷: 2, 期:40, 页:17047-17057
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: Nitrogen-doped carbon was found to exhibit excellent activity as an electrocatalyst in renewable energy devices. A controllable method to synthesize N-doped hierarchically porous carbons (PNCEs) partly with graphene-like structure using polyaniline (PANI)-polyvinylpyrrolidone (PVP) composite as a carbon source via a soft-template process was reported. The catalytic mechanism was thoroughly studied to better understand the relationship between the structure, Fe species and catalytic activity. The PNCE prepared at 1000 degrees C displays the best performance achieving a maximum power density of 456 mW cm(-2) and oxygen reduction reaction (ORR) onset potential of 0.90 V. More prominently, the catalyst presents superior stability, as well as poison tolerance including methanol and SO2 to the commercial JM-Pt/C catalyst in 0.5 M H2SO4. The PVP is proven to tailor the structure, improve the surface area, and alter the transition metal species. The PNCEs synthesized under NH3 exhibit considerably better catalytic activity toward ORR compared with the undoped carbon and PNCEs synthesized under an N-2 atmosphere. Furthermore, we find that the nitrogen bonding configurations, textural structure, Fe species and surface areas of PNCEs play key roles in the electrocatalytic activity towards the ORR. The formed FeN4 species hosted in the micropores acts as the active component for ORR activity in PNCEs, although it is not the only contributor to the high performance of PNCEs. The catalyst is expected to be a promising non-noble electrocatalyst for use in polymer electrolyte membrane fuel cells.
关键词[WOS]: PEM FUEL-CELL ;  MESOPOROUS CARBONS ;  ACTIVE-SITES ;  CATALYSTS ;  POLYANILINE ;  PERFORMANCE ;  GRAPHENE ;  STABILITY ;  NANOTUBES ;  SPECTROSCOPY
语种: 英语
WOS记录号: WOS:000343072300030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143928
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 DNL, Div Energy Storage, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Zhong, Hexiang,Deng, Chengwei,Qiu, Yanling,et al. Nitrogen-doped hierarchically porous carbon as efficient oxygen reduction electrocatalysts in acid electrolyte[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(40):17047-17057.
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