Experimental and Theoretical Investigation of the Restructuring Process Induced by CO at Near Ambient Pressure: Pt Nanoclusters on Graphene/Ir(111).

摘要: The adsorption of CO on Pt nanoclusters grown in a regular array template provided by the graphene/Ir(111) Moire was investigated means 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 bridge bonded species populate nonequivalent sites clusters, spanning first second-layer terraces borders edges, depending particle size morphology conditions. By combining experimental information results simulations, we observe significant restructuring clusters. Additionally, above room temperature at 0.1 mbar, clusters catalyze spillover underlying interface.