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Atomic structure of Pt nanoclusters supported by graphene/Ir(111) and reversible transformation under CO exposure

Journal Article · · Physical Review B
 [1];  [2];  [2];  [3];  [4];  [5];  [4];  [4];  [6];  [7];  [7]
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Hamburg (Germany); Univ. Siegen, Siegen (Germany)
  2. Univ. Grenoble Alpes, Grenoble (France); CNRS, Inst Neel, Grenoble (France)
  3. Univ. Grenoble Alpes, Grenoble (France); Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA), Grenoble (France)
  4. Univ. zu Koln (Germany)
  5. Univ. zu Koln (Germany); Peter Grunberg Inst., Julich (Germany)
  6. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Hamburg (Germany)
+ Show Author Affiliations

We investigate the atomic structure of graphene/Ir(111) supported platinum clusters with on average fewer than 40 atoms by means of surface x-ray diffraction (SXRD), grazing incidence small angle x-ray scattering (GISAXS), and normal incidence x-ray standing waves (NIXSW) measurements, in comparison with density functional theory calculations (DFT). GISAXS revealed that the clusters with 1.3 nm diameter form a regular array with domain sizes of 90 nm. SXRD shows that the 1–2 monolayer high, (111) oriented Pt nanoparticles grow epitaxially on the graphene support. From the combined analysis of the SXRD and NIXSW data, a three-dimensional (3D) structural model of the clusters and the graphene support can be deduced which is in line with the DFT results. For the clusters grown in ultrahigh vacuum the lattice parameter is reduced by (4.6±0.1)% compared to bulk platinum. The graphene layer undergoes a strong Pt adsorption induced buckling, caused by a rehybridization of the carbon atoms below the cluster. Lastly, in situ observation of the Pt clusters in CO and O2 environments revealed a reversible change of the clusters' strain state while successively dosing CO at room temperature and O2 at 575 K, pointing to a CO oxidation activity of the Pt clusters.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1248613
Alternate ID(s):
OSTI ID: 1236086
Report Number(s):
SAND--2016-0693J; 618860
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 4 Vol. 93; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (36)

Handbook of Heterogeneous Catalysis book March 2008
Quantum Phenomena in Clusters and Nanostructures book January 2003
Surface structure determination with X-ray standing waves journal October 1993
The structure of Pt-aggregates on a supported thin aluminum oxide film in comparison with unsupported alumina: a transmission electron microscopy study journal November 1997
X-ray standing waves and hard X-ray photoelectron spectroscopy at the insertion device beamline ID32 journal May 2010
Graphene on metal surfaces journal June 2009
High-Pressure CO Oxidation on Pt(111) Monitored with Infrared−Visible Sum Frequency Generation (SFG) journal April 1997
Structural Coherency of Graphene on Ir(111) journal February 2008
CO-Induced Smoluchowski Ripening of Pt Cluster Arrays on the Graphene/Ir(111) Moiré journal February 2013
Nanoparticle structures served up on a tray journal March 2013
Illuminating surface atoms in nanoclusters by differential X-ray absorption spectroscopy journal January 2014
A review on non-precious metal electrocatalysts for PEM fuel cells journal January 2011
Surface diffraction beamline at ESRF journal February 1995
Tunable interfacial properties of epitaxial graphene on metal substrates journal February 2010
Inorganic solid state chemically sensitive devices: electrochemical oxygen gas sensors journal October 1987
Periodically modulated geometric and electronic structure of graphene on Ru(0 0 0 1) journal February 2010
A versatile fabrication method for cluster superlattices journal October 2009
Growth of graphene on Ir(111) journal February 2009
Graphene on Ru(0001): a corrugated and chiral structure journal April 2010
Kink ordering and organized growth of Co clusters on a stepped Au(111) surface: A combined grazing-incidence x-ray scattering and STM study journal January 2008
Pinning of graphene to Ir(111) by flat Ir dots journal April 2008
Growth of Co on Au(111) studied by multiwavelength anomalous grazing-incidence small-angle x-ray scattering: From ordered nanostructures to percolated thin films and nanopillars journal June 2008
Onset of three-dimensional Ir islands on a graphene/Ir(111) template journal August 2009
Clusters binding to the graphene moiré on Ir(111): X-ray photoemission compared to density functional calculations journal January 2012
Local deformations and incommensurability of high-quality epitaxial graphene on a weakly interacting transition metal journal December 2012
Topography of the graphene/Ir(111) moiré studied by surface x-ray diffraction journal June 2015
Graphene on Ru(0001): A 25 × 25 Supercell journal September 2008
Structure Determination of the Coincidence Phase of Graphene on Ru(0001) journal April 2010
Graphene on Ir(111): Physisorption with Chemical Modulation journal July 2011
Atomic Structure and Crystalline Order of Graphene-Supported Ir Nanoparticle Lattices journal February 2013
Effect of Strain on the Reactivity of Metal Surfaces journal September 1998
Two-Dimensional Ir Cluster Lattice on a Graphene Moiré on Ir(111) journal November 2006
IsGISAXS : a program for grazing-incidence small-angle X-ray scattering analysis of supported islands journal July 2002
Integrated Intensities Using a Six-Circle Surface X-ray Diffractometer journal October 1997
ROD : a program for surface X-ray crystallography journal April 2000
The Problem with Determining Atomic Structure at the Nanoscale journal April 2007

Cited By (4)

Bimetallic Pd–Pt alloy nanocluster arrays on graphene/Rh(111): formation, stability, and dynamics journal January 2018
Pseudo-ordered distribution of Ir nanocrystals on h-BN journal January 2019
Growth and stability of Pt nanoclusters from 1 to 50 atoms on h-BN/Rh(111) journal January 2019
Magnetic properties of supported metal atoms and clusters journal October 2016

Figures / Tables (6)

FIG. 1(p. 4)figure FIG. 1
FIG. 2(p. 6)figure FIG. 2
FIG. 3(p. 7)figure FIG. 3
FIG. 4(p. 8)figure FIG. 4
FIG. 5(p. 9)figure FIG. 5
FIG. 6(p. 10)figure FIG. 6

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74 ATOMIC AND MOLECULAR PHYSICS