title: Experimental and Theoretical Investigation of the Restructuring Process Induced by CO at Near Ambient Pressure: Pt Nanoclusters on Graphene/Ir(111).
abstract: The adsorption of CO on Pt nanoclusters grown in a regular array on a template provided by the graphene/Ir(111) Moiré was investigated by means of infrared-visible sum frequency generation vibronic spectroscopy, scanning tunneling microscopy, X-ray photoelectron spectroscopy from ultrahigh vacuum to near-ambient pressure, and ab initio simulations. Both terminally and bridge bonded CO species populate nonequivalent sites of the clusters, spanning from first to second-layer terraces to borders and edges, depending on the particle size and morphology and on the adsorption conditions. By combining experimental information and the results of the simulations, we observe a significant restructuring of the clusters. Additionally, above room temperature and at 0.1 mbar, Pt clusters catalyze the spillover of CO to the underlying graphene/Ir(111) interface.
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: Podda
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Manuel
authors.initials: M
authors.lastname: Corva
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|International Centre for Theoretical Physics ICTP , Strada Costiera 11, Trieste 34151, Italy.
authors.forename: Fatema
authors.initials: F
authors.lastname: Mohamed
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Zhijing
authors.initials: Z
authors.lastname: Feng
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Carlo
authors.identifier: 0000-0001-9040-5746
authors.initials: C
authors.lastname: Dri
authors.affiliation: Faculty of Mathematics and Physics, Charles University in Prague , V Holešovickách 2, Praha 8 180 00, Czech Republica.
authors.forename: Filip
authors.initials: F
authors.lastname: Dvorák
authors.affiliation: Faculty of Mathematics and Physics, Charles University in Prague , V Holešovickách 2, Praha 8 180 00, Czech Republica.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Matolin
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Giovanni
authors.initials: G
authors.lastname: Comelli
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Maria
authors.initials: M
authors.lastname: Peressi
authors.affiliation: Physics Department, University of Trieste , via A. Valerio 2, Trieste 34127, Italy.|Istituto Officina dei Materiali CNR-IOM , S.S. 14 km 163.5, Area Science Park, Basovizza ,Trieste 34149, Italy.
authors.forename: Erik
authors.identifier: 0000-0002-6799-0032
authors.initials: E
authors.lastname: Vesselli
keywords: SFG; carbon monoxide; graphene; near-ambient pressure; platinum clusters