ACS Catalysis · 2013 · 36 citations · 38 references
Natural SciencesChemistryMaterials ScienceMaterials ChemistrySurface ChemistrySurface ScienceSupported CatalystsSurface CatalysisSurface Chemistry Of SolidsSurface Functionalization Of NanomaterialsSurface ReactivitySurface SpectroscopyCatalyst SurfacesMetal CatalystsMetal Oxide SupportsMetal-support InteractionsNoble Metal CatalysisStrong Metal-support InteractionThiol ChemistryThiol-based Surface Chemistry
It is widely recognized that the strong metal support interaction (SMSI) can be found between noble metal catalysts and early transition metal oxide supports (e.g., Pt/TiO 2 ), but not for carbon supports, of which electronic interaction between that and a noble metal is too weak because of the chemical inertness of the surface basal plane. Herein, we report a strong interaction between Pt and carbon through the medium of surface thiol groups. From the in situ XANES studies on the Pt L 3 and the S K absorption edges, it was clearly revealed that the SMSI was formed by the charge back-donation from S to Pt at high potentials, eventually leading to a markedly enhanced tolerance of Pt/S-MWNT against Pt dissolution.
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