Issue 59, 2019

Sequestration of carbon monoxide at room temperature at vacancy sites of graphene

Abstract

By using high-resolution electron energy loss spectroscopy and density functional theory, we have studied the interaction of carbon monoxide with a defected graphene sheet. Both experiments and theory indicate that unsaturated C atoms at vacancies are able to capture carbon monoxide at room temperature. Definitely, the sequestration of carbon monoxide at carbon vacancies implies the formation of a weak C–O–C bond, evidenced by its peculiar vibrational energy of 150 meV (1209 cm−1). We also show that, by tuning the density of vacancies, it is possible to obtain a selective CO adsorption at vacancies without intercalation under the graphene cover. Captured CO molecules are stably adsorbed up to a temperature of 500 K. These findings represent the initial step toward the development of processes for the graphene-mediated partial sequestration and selective oxidation of CO.

Graphical abstract: Sequestration of carbon monoxide at room temperature at vacancy sites of graphene

Supplementary files

Article information

Article type
Communication
Submitted
02 6 2019
Accepted
27 6 2019
First published
27 6 2019

Chem. Commun., 2019,55, 8607-8610

Sequestration of carbon monoxide at room temperature at vacancy sites of graphene

G. Chiarello, V. Fabio, D. W. Boukhvalov and A. Politano, Chem. Commun., 2019, 55, 8607 DOI: 10.1039/C9CC04225C

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