新科学想法 › 文献管理 › 浏览文献

Transformation of Carbon Monomers and Dimers to Graphene Islands on Co(0001): Thermodynamics and Kinetics

colorstone 添加于 2013-4-9 14:53 | 1606 次阅读 | 0 个评论

作者
Xu L, Jin Y, Wu Z, Yuan Q, Jiang Z, Ma Y, Huang W
摘要
$\"Abstract$
Although graphene on metal surfaces has been extensively investigated, the comprehensive and quantitative experimental results exploring the growth mechanism of graphene on metal surfaces are quite few. Employing in situ and time-resolved X-ray photoelectron spectroscopy measurements, we report the comprehensive and quantitative data for the thermodynamics and kinetics of both the C₁-to-graphene transformation reaction on Co(0001) covered with C₁ adatoms and graphene islands and the C₂-to-graphene transformation reaction on Co(0001) covered with C₂ dimers and graphene islands. Both transformation reactions proceed via carbon cluster attachment mechanism. The enthalpy and apparent activation energy were determined, respectively, to be $\"\"$ 261 and $\"\"$ 139 kJ/mol for the C₁-to-graphene transformation reaction, and $\"\"$ 287 and $\"\"$ 280 kJ/mol for the C₂-to-graphene transformation reaction. The C₁-to-graphene transformation reaction on Co(0001) likely proceeds without the formation of C₂ dimers. These experimental data provide benchmark experimental results for fundamentally understanding the graphene growth mechanism on metal surfaces.
详细资料
- 文献种类:期刊
- 期刊名称: The Journal of Physical Chemistry C
- 期刊缩写: J. Phys. Chem. C
- 期卷页: 2013年第117卷第6期 2952-2958页
- ISBN: 1932-7447
相关链接 DOI URL