Bifunctional catalytic effect of Mo2C/oxide interface on multi-layer graphene growth

The role of the Mo 2 C/oxide interface on multi-layer graphene (MLG) nucleation during a chemical vapor deposition (CVD) process is investigated. During the CVD process, MLG growth is only observed in the presence of a Mo 2 C/SiO 2 interface, indicating that the chemical reactions occurring at this...

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Bibliographic Details
Published in:Scientific reports 2021-07, Vol.11 (1), p.15377-15377, Article 15377
Main Authors: Kizir, Seda, van den Beld, Wesley T. E., Schurink, Bart, van de Kruijs, Robbert W. E., Benschop, Jos P. H., Bijkerk, Fred
Format: Article
Language:English
Subjects:
639/301
639/301/357
639/301/357/918
639/301/357/918/1055
Catalysts
Chemical reactions
Chemical vapor deposition
Dehydrogenation
Graphene
Humanities and Social Sciences
Interfaces
multidisciplinary
Nucleation
Science
Science (multidisciplinary)
Silicon dioxide
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Summary:The role of the Mo 2 C/oxide interface on multi-layer graphene (MLG) nucleation during a chemical vapor deposition (CVD) process is investigated. During the CVD process, MLG growth is only observed in the presence of a Mo 2 C/SiO 2 interface, indicating that the chemical reactions occurring at this interface trigger the nucleation of MLG. The chemical reaction pathway is explained in four steps as (1) creation of H radicals, (2) reduction of the oxide surface, (3) formation of C–C bonds at O–H sites, and (4) expansion of graphitic domains on the Mo 2 C catalyst. Different Mo 2 C/oxide interfaces are investigated, with varying affinity for reduction in a hydrogen environment. The results demonstrate a catalyst/oxide bifunctionality on MLG nucleation, comprising of CH 4 dehydrogenation by Mo 2 C and initial C–C bond formation at the oxide interface.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-94694-4