1 research outputs found
Experimental and Theoretical Investigation of the Restructuring Process Induced by CO at Near Ambient Pressure: Pt Nanoclusters on Graphene/Ir(111)
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 <i>ab initio</i> 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