Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S

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Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S. / Nilsson, Louis; Andersen, Mie; Hammer, Bjørk; Stensgaard, Ivan; Hornekær, Liv.

In: The Journal of Physical Chemistry Letters, Vol. 4, No. 21, 07.11.2013, p. 3770-3774.

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

Harvard

Nilsson, L, Andersen, M, Hammer, B, Stensgaard, I & Hornekær, L 2013, 'Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S', The Journal of Physical Chemistry Letters, vol. 4, no. 21, pp. 3770-3774. https://doi.org/10.1021/jz402054e

APA

CBE

MLA

Nilsson, Louis et al. "Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S". The Journal of Physical Chemistry Letters. 2013, 4(21). 3770-3774. https://doi.org/10.1021/jz402054e

Vancouver

Author

Nilsson, Louis ; Andersen, Mie ; Hammer, Bjørk ; Stensgaard, Ivan ; Hornekær, Liv. / Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S. In: The Journal of Physical Chemistry Letters. 2013 ; Vol. 4, No. 21. pp. 3770-3774.

Bibtex

@article{ea8367bf960a4b309cada15df9b26fc1,
title = "Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S",
abstract = "The coating effect of a graphene layer on the reconstructed Pt(100) surface toward reactive gases is investigated by a combination of scanning tunneling microscopy experiments and density functional theory calculations. We observe that while the graphene coating is effective toward individual exposures of O2 and H2S, a sequential dose of O2 and H2S causes a breakdown of the coating effect. From density functional theory calculations we explain these observations at the atomic level. We show that it is favorable for oxygen atoms to disrupt the Pt–C bonds at the graphene edge to insert between the edge and the surface in a bridging position. This closed-edge configuration explains why oxygen alone is not found to intercalate under the graphene at room temperature. With the subsequent dosing of H2S, we propose that the oxygen atoms are released from the platinum surface causing the breakdown of the coating effect",
author = "Louis Nilsson and Mie Andersen and Bj{\o}rk Hammer and Ivan Stensgaard and Liv Hornek{\ae}r",
year = "2013",
month = nov,
day = "7",
doi = "10.1021/jz402054e",
language = "English",
volume = "4",
pages = "3770--3774",
journal = "The Journal of Physical Chemistry Letters",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "21",

}

RIS

TY - JOUR

T1 - Breakdown of the Graphene Coating Effect under Sequential Exposure to O2 and H2S

AU - Nilsson, Louis

AU - Andersen, Mie

AU - Hammer, Bjørk

AU - Stensgaard, Ivan

AU - Hornekær, Liv

PY - 2013/11/7

Y1 - 2013/11/7

N2 - The coating effect of a graphene layer on the reconstructed Pt(100) surface toward reactive gases is investigated by a combination of scanning tunneling microscopy experiments and density functional theory calculations. We observe that while the graphene coating is effective toward individual exposures of O2 and H2S, a sequential dose of O2 and H2S causes a breakdown of the coating effect. From density functional theory calculations we explain these observations at the atomic level. We show that it is favorable for oxygen atoms to disrupt the Pt–C bonds at the graphene edge to insert between the edge and the surface in a bridging position. This closed-edge configuration explains why oxygen alone is not found to intercalate under the graphene at room temperature. With the subsequent dosing of H2S, we propose that the oxygen atoms are released from the platinum surface causing the breakdown of the coating effect

AB - The coating effect of a graphene layer on the reconstructed Pt(100) surface toward reactive gases is investigated by a combination of scanning tunneling microscopy experiments and density functional theory calculations. We observe that while the graphene coating is effective toward individual exposures of O2 and H2S, a sequential dose of O2 and H2S causes a breakdown of the coating effect. From density functional theory calculations we explain these observations at the atomic level. We show that it is favorable for oxygen atoms to disrupt the Pt–C bonds at the graphene edge to insert between the edge and the surface in a bridging position. This closed-edge configuration explains why oxygen alone is not found to intercalate under the graphene at room temperature. With the subsequent dosing of H2S, we propose that the oxygen atoms are released from the platinum surface causing the breakdown of the coating effect

U2 - 10.1021/jz402054e

DO - 10.1021/jz402054e

M3 - Journal article

VL - 4

SP - 3770

EP - 3774

JO - The Journal of Physical Chemistry Letters

JF - The Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 21

ER -