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Reversible Hydrogenation of Graphene on Ni(111)—Synthesis of “Graphone”
Author(s) -
Zhao Wei,
Gebhardt Julian,
Späth Florian,
Gotterbarm Karin,
Gleichweit Christoph,
Steinrück HansPeter,
Görling Andreas,
Papp Christian
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404938
Subject(s) - graphene , dehydrogenation , desorption , x ray photoelectron spectroscopy , hydrogen , materials science , density functional theory , hydrogen storage , adsorption , nanotechnology , catalysis , chemical engineering , chemistry , computational chemistry , organic chemistry , engineering
Understanding the adsorption and reaction between hydrogen and graphene is of fundamental importance for developing graphene‐based concepts for hydrogen storage and for the chemical functionalization of graphene by hydrogenation. Recently, theoretical studies of single‐sided hydrogenated graphene, so called graphone, predicted it to be a promising semiconductor for applications in graphene‐based electronics. Here, we report on the synthesis of graphone bound to a Ni(111) surface. We investigate the formation process by X‐ray photoelectron spectroscopy (XPS), temperature‐programmed desorption (TPD), and density‐functional theory calculations, showing that the hydrogenation of graphene with atomic hydrogen indeed leads to graphone, that is, a hydrogen coverage of 1 ML (4.2 wt %). The dehydrogenation of graphone reveals complex desorption processes that are attributed to coverage‐dependent changes in the activation energies for the associative desorption of hydrogen as molecular H 2 .