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Intercalation-etching of graphene on Pt(111) in H-2 and O-2 observed by in-situ low energy electron microscopy
Wei, Wei1,2; Meng, Caixia2; Fu, Qiang2; Bao, Xinhe2
关键词Graphene Etching Intercalation Leem Oxidation Hydrogenation
刊名SCIENCE CHINA-CHEMISTRY
2017-05-01
DOI10.1007/s11426-017-9020-2
60期:5页:656-662
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Multidisciplinary
研究领域[WOS]Chemistry
关键词[WOS]CHEMICAL-VAPOR-DEPOSITION ; SINGLE-CRYSTAL GRAPHENE ; HEXAGONAL BORON-NITRIDE ; HYDROGEN INTERCALATION ; OXYGEN INTERCALATION ; DOPED GRAPHENE ; GROWN GRAPHENE ; GRAPHITE ; COPPER ; OXIDATION
英文摘要Graphene layers are often exposed to gaseous environments in their synthesis and application processes, and interactions of graphene surfaces with molecules particularly H-2 and O-2 are of great importance in their physico-chemical properties. In this work, etching of graphene overlayers on Pt(111) in H-2 and O-2 atmospheres were investigated by in-situ low energy electron microscopy. Significant graphene etching was observed in 10(-5) Torr H-2 above 1023 K, which occurs simultaneously at graphene island edges and interiors with a determined reaction barrier at 5.7 eV. The similar etching phenomena were found in 10(-7) Torr O-2 above 973 K, while only island edges were reacted between 823 and 923 K. We suggest that etching of graphene edges is facilitated by Pt-aided hydrogenation or oxidation of edge carbon atoms while intercalation-etching is attributed to etching at the interiors at high temperatures. The different findings with etching in O-2 and H-2 depend on competitive adsorption, desorption, and diffusion processes of O and H atoms on Pt surface, as well as intercalation at the graphene/Pt interface.
语种英语
WOS记录号WOS:000400771800012
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/151987
专题中国科学院大连化学物理研究所
作者单位1.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, iChEM, Dalian 116023, Peoples R China
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GB/T 7714
Wei, Wei,Meng, Caixia,Fu, Qiang,et al. Intercalation-etching of graphene on Pt(111) in H-2 and O-2 observed by in-situ low energy electron microscopy[J]. SCIENCE CHINA-CHEMISTRY,2017,60(5):656-662.
APA Wei, Wei,Meng, Caixia,Fu, Qiang,&Bao, Xinhe.(2017).Intercalation-etching of graphene on Pt(111) in H-2 and O-2 observed by in-situ low energy electron microscopy.SCIENCE CHINA-CHEMISTRY,60(5),656-662.
MLA Wei, Wei,et al."Intercalation-etching of graphene on Pt(111) in H-2 and O-2 observed by in-situ low energy electron microscopy".SCIENCE CHINA-CHEMISTRY 60.5(2017):656-662.
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