Scalable bottom-up synthesis of Co-Ni–doped graphene

Introducing heteroatoms into graphene is a powerful strategy to modulate its catalytic, electronic, and magnetic properties. At variance with the cases of nitrogen (N)- and boron (B)-doped graphene, a scalable method for incorporating transition metal atoms in the carbon (C) mesh is currently lacking, limiting the applicative interest of model system studies. This work presents a during-growth synthesis enabling the incorporation of cobalt (Co) alongside nickel (Ni) atoms in graphene on a Ni(111) substrate. Single atoms are covalently stabilized within graphene double vacancies, with a Co load ranging from 0.07 to 0.22% relative to C atoms, controllable by synthesis parameters. Structural characterization involves variable-temperature scanning tunneling microscopy and ab initio calculations. The Co- and Ni-codoped layer is transferred onto a transmission electron microscopy grid, confirming stability through scanning transmission electron microscopy and electron energy loss spectroscopy. This method holds promise for applications in spintronics, gas sensing, electrochemistry and catalysis, and potential extension to graphene incorporation of similar metals.

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Publication Details

Journal
Science Advances
Published
2024-11-08
DOI
https://doi.org/10.1126/sciadv.ado8956
Citations
14
Primary Topic
Graphene research and applications
Type
article
Field-Weighted Citation Impact
1.64
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article

Scalable bottom-up synthesis of Co-Ni–doped graphene

Cinzia Cepek, Jani Kotakoski, Mirco Panighel, Cristina Africh et al.
14 citations
Science Advances
Graphene research and applications
1.64
article

Scalable bottom-up synthesis of Co-Ni–doped graphene

Cinzia Cepek, Jani Kotakoski, Mirco Panighel, Cristina Africh, Aldo Ugolotti, Giovanni Comelli, Matuš Stredansky, Ayesha Farooq, Cristiana Di Valentin, Valeria Chesnyak, Thuy An Bui, Alexander Markevich, Daniele Perilli, Clara Kofler, Alessandro Namar
article en
14 citations

Abstract

Introducing heteroatoms into graphene is a powerful strategy to modulate its catalytic, electronic, and magnetic properties. At variance with the cases of nitrogen (N)- and boron (B)-doped graphene, a scalable method for incorporating transition metal atoms in the carbon (C) mesh is currently lacking, limiting the applicative interest of model system studies. This work presents a during-growth synthesis enabling the incorporation of cobalt (Co) alongside nickel (Ni) atoms in graphene on a Ni(111) substrate. Single atoms are covalently stabilized within graphene double vacancies, with a Co load ranging from 0.07 to 0.22% relative to C atoms, controllable by synthesis parameters. Structural characterization involves variable-temperature scanning tunneling microscopy and ab initio calculations. The Co- and Ni-codoped layer is transferred onto a transmission electron microscopy grid, confirming stability through scanning transmission electron microscopy and electron energy loss spectroscopy. This method holds promise for applications in spintronics, gas sensing, electrochemistry and catalysis, and potential extension to graphene incorporation of similar metals.

Science AdvancesVol. 10(45)
University of Vienna (AT), University of Trieste (IT), Istituto Officina dei Materiali (IT), University of Milano-Bicocca (IT)
Affordable and clean energy
Openalex Percentile: Top 12%
Graphene research and applications
1.64
DOIOpen Access PDFOpenAlex
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