Defect‐Rich Graphene Nanomesh Produced by Thermal Exfoliation of Metal–Organic Frameworks for the Oxygen Reduction Reaction

Although graphene nanomesh is an attractive 2D carbon material, general synthetic routes to produce functional graphene nanomesh in large‐scale are complex and tedious. Herein, we elaborately design a simple two‐step dimensional reduction strategy for exploring nitrogen‐doped graphene nanomesh by th...

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Published inAngewandte Chemie Vol. 131; no. 38; pp. 13488 - 13493
Main Authors Xia, Wei, Tang, Jing, Li, Jingjing, Zhang, Shuaihua, Wu, Kevin C.‐W., He, Jianping, Yamauchi, Yusuke
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 16.09.2019
Subjects
2D-Materialien
Catalysis
Catalytic activity
Chemical reduction
Chemistry
Crystal structure
Electrolytes
Etching
Exfoliation
Graphen-Nanogeflecht
Graphene
Metal chlorides
Metal-organic frameworks
Metall-organische Gerüstverbindungen
Metals
Morphology
Nitrogen
Oxygen
Oxygen reduction reactions
Porosity
Sauerstoffreduktionsreaktion (ORR)
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Summary:Although graphene nanomesh is an attractive 2D carbon material, general synthetic routes to produce functional graphene nanomesh in large‐scale are complex and tedious. Herein, we elaborately design a simple two‐step dimensional reduction strategy for exploring nitrogen‐doped graphene nanomesh by thermal exfoliation of crystal‐ and shape‐modified metal‐organic frameworks (MOFs). MOF nanoleaves with 2D rather than 3D crystal structure are used as the precursor, which are further thermally unraveled into nitrogen‐doped graphene nanomesh by using metal chlorides as the exfoliators and etching agent. The nitrogen‐doped graphene nanomesh has a unique ultrathin two‐dimensional morphology, high porosity, rich and accessible nitrogen‐doped active sites, and defective graphene edges, contributing to an unprecedented catalytic activity for the oxygen reduction reaction (ORR) in acid electrolytes. This approach is suitable for scalable production. Ein N‐dotiertes Graphen‐Nanogeflecht wurde durch thermische Exfoliation von kristall‐ und formmodifizierten Metall‐organischen Gerüsten hergestellt. Das ultradünne, stickstoffdotierte Graphen‐Nanogeflecht, das mit hochporösen und fehlerreichen Graphenkanten erhalten wurde, zeigt eine beispiellose katalytische Aktivität in der Sauerstoffreduktionsreaktion (ORR) in sauren Elektrolyten.
Bibliography:These authors contributed equally to this work.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201906870