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Exciting H2 Molecules for Graphene Functionalization

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Exciting H2 Molecules for Graphene Functionalization. / Kyhl, Line; Bisson, Regis; Balog, Richard; Groves, Michael N; Kolsbjerg, Esben Leonhard; Cassidy, Andrew Martin; Jørgensen, Jakob Holm; Halkjær, Susanne; Miwa, Jill A; Čabo, Antonija Grubišić; Angot, Thierry; Hofmann, Philip; Arman, Mohammad Alif; Urpelainen, Samuli; Lacovig, Paolo; Bignardi, Luca; Bluhm, Hendrik; Knudsen, Jan; Hammer, Bjørk; Hornekaer, Liv.

In: ACS Nano, Vol. 12, 2018, p. 513-520.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Kyhl, L, Bisson, R, Balog, R, Groves, MN, Kolsbjerg, EL, Cassidy, AM, Jørgensen, JH, Halkjær, S, Miwa, JA, Čabo, AG, Angot, T, Hofmann, P, Arman, MA, Urpelainen, S, Lacovig, P, Bignardi, L, Bluhm, H, Knudsen, J, Hammer, B & Hornekaer, L 2018, 'Exciting H2 Molecules for Graphene Functionalization', ACS Nano, vol. 12, pp. 513-520. https://doi.org/10.1021/acsnano.7b07079

APA

Kyhl, L., Bisson, R., Balog, R., Groves, M. N., Kolsbjerg, E. L., Cassidy, A. M., Jørgensen, J. H., Halkjær, S., Miwa, J. A., Čabo, A. G., Angot, T., Hofmann, P., Arman, M. A., Urpelainen, S., Lacovig, P., Bignardi, L., Bluhm, H., Knudsen, J., Hammer, B., & Hornekaer, L. (2018). Exciting H2 Molecules for Graphene Functionalization. ACS Nano, 12, 513-520. https://doi.org/10.1021/acsnano.7b07079

CBE

Kyhl L, Bisson R, Balog R, Groves MN, Kolsbjerg EL, Cassidy AM, Jørgensen JH, Halkjær S, Miwa JA, Čabo AG, Angot T, Hofmann P, Arman MA, Urpelainen S, Lacovig P, Bignardi L, Bluhm H, Knudsen J, Hammer B, Hornekaer L. 2018. Exciting H2 Molecules for Graphene Functionalization. ACS Nano. 12:513-520. https://doi.org/10.1021/acsnano.7b07079

MLA

Vancouver

Kyhl L, Bisson R, Balog R, Groves MN, Kolsbjerg EL, Cassidy AM et al. Exciting H2 Molecules for Graphene Functionalization. ACS Nano. 2018;12:513-520. https://doi.org/10.1021/acsnano.7b07079

Author

Kyhl, Line ; Bisson, Regis ; Balog, Richard ; Groves, Michael N ; Kolsbjerg, Esben Leonhard ; Cassidy, Andrew Martin ; Jørgensen, Jakob Holm ; Halkjær, Susanne ; Miwa, Jill A ; Čabo, Antonija Grubišić ; Angot, Thierry ; Hofmann, Philip ; Arman, Mohammad Alif ; Urpelainen, Samuli ; Lacovig, Paolo ; Bignardi, Luca ; Bluhm, Hendrik ; Knudsen, Jan ; Hammer, Bjørk ; Hornekaer, Liv. / Exciting H2 Molecules for Graphene Functionalization. In: ACS Nano. 2018 ; Vol. 12. pp. 513-520.

Bibtex

@article{6a1952f23cf44b7ea9ed6ab100ded5ca,
title = "Exciting H2 Molecules for Graphene Functionalization",
abstract = "Hydrogen functionalization of graphene by exposure to vibrationally excited H2 molecules is investigated by combined scanning tunneling microscopy, high resolution electron energy loss spectroscopy, x-ray photoemission spectroscopy measurements and density functional theory calculations. The measurements reveal that vibrationally excited H2 molecules dissociatively adsorb on graphene on Ir(111) resulting in nano-patterned hydrogen functionalization structures. Calculations demonstrate that the presence of the Ir surface below the graphene lowers the H2 dissociative adsorption barrier and allows for the adsorption reaction at energies well below the dissociation threshold of the H-H bond. The first reacting H2 molecule must contain considerable vibrational energy to overcome the dissociative adsorption barrier. However, this initial adsorption further activates the surface resulting in reduced barriers for dissociative adsorption of subsequent H2 molecules. This enables functionalization by H2 molecules with lower vibrational energy, yielding an avalanche effect for the hydrogenation reaction. These results provide an example of a catalytically active graphene coated surface and additionally set the stage for a reinterpretation of previous experimental work involving elevated H2 background gas pressures in the presence of hot filaments.",
keywords = "Journal Article",
author = "Line Kyhl and Regis Bisson and Richard Balog and Groves, {Michael N} and Kolsbjerg, {Esben Leonhard} and Cassidy, {Andrew Martin} and J{\o}rgensen, {Jakob Holm} and Susanne Halkj{\ae}r and Miwa, {Jill A} and {\v C}abo, {Antonija Grubi{\v s}i{\'c}} and Thierry Angot and Philip Hofmann and Arman, {Mohammad Alif} and Samuli Urpelainen and Paolo Lacovig and Luca Bignardi and Hendrik Bluhm and Jan Knudsen and Bj{\o}rk Hammer and Liv Hornekaer",
year = "2018",
doi = "10.1021/acsnano.7b07079",
language = "English",
volume = "12",
pages = "513--520",
journal = "A C S Nano",
issn = "1936-0851",
publisher = "American Chemical Society",

}

RIS

TY - JOUR

T1 - Exciting H2 Molecules for Graphene Functionalization

AU - Kyhl, Line

AU - Bisson, Regis

AU - Balog, Richard

AU - Groves, Michael N

AU - Kolsbjerg, Esben Leonhard

AU - Cassidy, Andrew Martin

AU - Jørgensen, Jakob Holm

AU - Halkjær, Susanne

AU - Miwa, Jill A

AU - Čabo, Antonija Grubišić

AU - Angot, Thierry

AU - Hofmann, Philip

AU - Arman, Mohammad Alif

AU - Urpelainen, Samuli

AU - Lacovig, Paolo

AU - Bignardi, Luca

AU - Bluhm, Hendrik

AU - Knudsen, Jan

AU - Hammer, Bjørk

AU - Hornekaer, Liv

PY - 2018

Y1 - 2018

N2 - Hydrogen functionalization of graphene by exposure to vibrationally excited H2 molecules is investigated by combined scanning tunneling microscopy, high resolution electron energy loss spectroscopy, x-ray photoemission spectroscopy measurements and density functional theory calculations. The measurements reveal that vibrationally excited H2 molecules dissociatively adsorb on graphene on Ir(111) resulting in nano-patterned hydrogen functionalization structures. Calculations demonstrate that the presence of the Ir surface below the graphene lowers the H2 dissociative adsorption barrier and allows for the adsorption reaction at energies well below the dissociation threshold of the H-H bond. The first reacting H2 molecule must contain considerable vibrational energy to overcome the dissociative adsorption barrier. However, this initial adsorption further activates the surface resulting in reduced barriers for dissociative adsorption of subsequent H2 molecules. This enables functionalization by H2 molecules with lower vibrational energy, yielding an avalanche effect for the hydrogenation reaction. These results provide an example of a catalytically active graphene coated surface and additionally set the stage for a reinterpretation of previous experimental work involving elevated H2 background gas pressures in the presence of hot filaments.

AB - Hydrogen functionalization of graphene by exposure to vibrationally excited H2 molecules is investigated by combined scanning tunneling microscopy, high resolution electron energy loss spectroscopy, x-ray photoemission spectroscopy measurements and density functional theory calculations. The measurements reveal that vibrationally excited H2 molecules dissociatively adsorb on graphene on Ir(111) resulting in nano-patterned hydrogen functionalization structures. Calculations demonstrate that the presence of the Ir surface below the graphene lowers the H2 dissociative adsorption barrier and allows for the adsorption reaction at energies well below the dissociation threshold of the H-H bond. The first reacting H2 molecule must contain considerable vibrational energy to overcome the dissociative adsorption barrier. However, this initial adsorption further activates the surface resulting in reduced barriers for dissociative adsorption of subsequent H2 molecules. This enables functionalization by H2 molecules with lower vibrational energy, yielding an avalanche effect for the hydrogenation reaction. These results provide an example of a catalytically active graphene coated surface and additionally set the stage for a reinterpretation of previous experimental work involving elevated H2 background gas pressures in the presence of hot filaments.

KW - Journal Article

U2 - 10.1021/acsnano.7b07079

DO - 10.1021/acsnano.7b07079

M3 - Journal article

C2 - 29253339

VL - 12

SP - 513

EP - 520

JO - A C S Nano

JF - A C S Nano

SN - 1936-0851

ER -