Water Chemistry beneath Graphene : Condensation of a Dense OH-H2O Phase under Graphene
(2022) In Journal of Physical Chemistry C 126(9). p.4347-4354- Abstract
Room temperature oxygen hydrogenation below graphene flakes supported by Ir(111) is investigated through a combination of X-ray photoelectron spectroscopy, scanning tunneling microscopy, and density functional theory calculations using an evolutionary search algorithm. We demonstrate how the graphene cover and its doping level can be used to trap and characterize dense mixed O-OH-H2O phases that otherwise would not exist. Our study of these graphene-stabilized phases and their response to oxygen or hydrogen exposure reveals that additional oxygen can be dissolved into them at room temperature creating mixed O-OH-H2O phases with an increased areal coverage underneath graphene. In contrast, additional hydrogen... (More)
Room temperature oxygen hydrogenation below graphene flakes supported by Ir(111) is investigated through a combination of X-ray photoelectron spectroscopy, scanning tunneling microscopy, and density functional theory calculations using an evolutionary search algorithm. We demonstrate how the graphene cover and its doping level can be used to trap and characterize dense mixed O-OH-H2O phases that otherwise would not exist. Our study of these graphene-stabilized phases and their response to oxygen or hydrogen exposure reveals that additional oxygen can be dissolved into them at room temperature creating mixed O-OH-H2O phases with an increased areal coverage underneath graphene. In contrast, additional hydrogen exposure converts the mixed O-OH-H2O phases back to pure OH-H2O with a reduced areal coverage underneath graphene.
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- author
- Grånäs, Elin LU ; Schröder, Ulrike A. ; Arman, Mohammad A. LU ; Andersen, Mie ; Gerber, Timm ; Schulte, Karina ; Andersen, Jesper N. LU ; Michely, Thomas ; Hammer, Bjørk and Knudsen, Jan LU
- organization
- publishing date
- 2022-03-10
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry C
- volume
- 126
- issue
- 9
- pages
- 8 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:35299819
- scopus:85125927917
- ISSN
- 1932-7447
- DOI
- 10.1021/acs.jpcc.1c10289
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2022 The Authors. Published by American Chemical Society.
- id
- 48aa5c07-5137-4d58-bd06-8437fdbbcf7e
- date added to LUP
- 2022-05-23 09:26:07
- date last changed
- 2024-09-19 21:44:29
@article{48aa5c07-5137-4d58-bd06-8437fdbbcf7e, abstract = {{<p>Room temperature oxygen hydrogenation below graphene flakes supported by Ir(111) is investigated through a combination of X-ray photoelectron spectroscopy, scanning tunneling microscopy, and density functional theory calculations using an evolutionary search algorithm. We demonstrate how the graphene cover and its doping level can be used to trap and characterize dense mixed O-OH-H<sub>2</sub>O phases that otherwise would not exist. Our study of these graphene-stabilized phases and their response to oxygen or hydrogen exposure reveals that additional oxygen can be dissolved into them at room temperature creating mixed O-OH-H<sub>2</sub>O phases with an increased areal coverage underneath graphene. In contrast, additional hydrogen exposure converts the mixed O-OH-H<sub>2</sub>O phases back to pure OH-H<sub>2</sub>O with a reduced areal coverage underneath graphene.</p>}}, author = {{Grånäs, Elin and Schröder, Ulrike A. and Arman, Mohammad A. and Andersen, Mie and Gerber, Timm and Schulte, Karina and Andersen, Jesper N. and Michely, Thomas and Hammer, Bjørk and Knudsen, Jan}}, issn = {{1932-7447}}, language = {{eng}}, month = {{03}}, number = {{9}}, pages = {{4347--4354}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Journal of Physical Chemistry C}}, title = {{Water Chemistry beneath Graphene : Condensation of a Dense OH-H<sub>2</sub>O Phase under Graphene}}, url = {{http://dx.doi.org/10.1021/acs.jpcc.1c10289}}, doi = {{10.1021/acs.jpcc.1c10289}}, volume = {{126}}, year = {{2022}}, }