Article (Scientific journals)
Mechanism of CO Intercalation through the Graphene/Ni(111) Interface and Effect of Doping
Perilli, D.; Fiori, S.; PANIGHEL, Mirco et al.
2020In Journal of Physical Chemistry Letters, 11 (20), p. 8887 - 8892
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Keywords :
graphene; carbon monoxide; gas storage; intercalation; surface science; scanning tunneling microscopy; density functional theory; ultra-high vacuum; ultra high vacuum; nanotechnology; 2d materials
Abstract :
[en] Molecules intercalate at the graphene/metal interface even though defect-free graphene is impermeable to any atomic and molecular species in the gas and liquid phase, except hydrogen. The mechanism of molecular intercalation is still a big open question. In this Letter, by means of a combined experimental (STM, XPS, and LEED) and theoretical (DFT) study, we present a proof of how CO molecules succeed in permeating the graphene layer and get into the confined zone between graphene and the Ni(111) surface. The presence of N-dopants in the graphene layer is found to highly facilitate the permeation process, reducing the CO threshold pressure by more than one order of magnitude, through the stabilization of multiatomic vacancy defects that are the open doors to the bidimensional nanospace, with crucial implications for the catalysis under cover and for the graphene-based electrochemistry.
Disciplines :
Physics
Author, co-author :
Perilli, D.
Fiori, S.
PANIGHEL, Mirco  ;  CNR - Istituto Officina dei Materiali (IOM), Trieste, Laboratorio TASC, Strada Statale 14, km 163.5, 34149 Basovizza, Italy
Liu, H.
Cepek, C.
Peressi, M.
Comelli, G.
Africh, C.
Di Valentin, C.
External co-authors :
yes
Language :
English
Title :
Mechanism of CO Intercalation through the Graphene/Ni(111) Interface and Effect of Doping
Publication date :
2020
Journal title :
Journal of Physical Chemistry Letters
eISSN :
1948-7185
Volume :
11
Issue :
20
Pages :
8887 - 8892
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Physics and Materials Science
Development Goals :
12. Responsible consumption and production
Funding text :
This work has been supported by the project “MADAM - Metal Activated 2D cArbon-based platforMs” funded by the MIUR Progetti di Ricerca di Rilevante Interesse Nazionale (PRIN) Bando 2017 - Grant 2017NYPHN8 and by the program “Finanziamento di Ateneo per progetti di ricerca scientifici – FRA 2018” University of Trieste.
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