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

Seda Kizir*, Wesley T.E. van den Beld, Bart Schurink, Robbert W.E. van de Kruijs, Jos P.H. Benschop, Fred Bijkerk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

The role of the Mo2C/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 Mo2C/SiO2 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 Mo2C catalyst. Different Mo2C/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 CH4 dehydrogenation by Mo2C and initial C–C bond formation at the oxide interface.

Original languageEnglish
Article number15377
JournalScientific reports
Volume11
Issue number1
DOIs
Publication statusPublished - 28 Jul 2021

Keywords

  • UT-Gold-D

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