Intercalation-etching of graphene on Pt(111) in H-2 and O-2 observed by in-situ low energy electron microscopy
文献类型：期刊论文
| 作者 | Wei, Wei1,2; Meng, Caixia2; Fu, Qiang2; Bao, Xinhe2 |
| 刊名 | SCIENCE CHINA-CHEMISTRY
 |
| 出版日期 | 2017-05-01 |
| 卷号 | 60期号:5页码:656-662 |
| 关键词 | graphene etching intercalation LEEM oxidation hydrogenation |
| 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. |
| 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 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000400771800012 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/151987]  |
| 专题 | 大连化学物理研究所_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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。