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- W3017203618 abstract "Metal–support interactions significantly affect the performance of heterogeneous catalysts, of which Pt supported on γ-Al2O3 is one of the most widely used. Characterizing the bonding of Pt on the γ-Al2O3 surface is key to fully understanding the catalyst–support interaction. Herein aberration-corrected and monochromated scanning transmission electron microscopy-based electron energy-loss spectroscopy (STEM-EELS) were employed on a model Pt/γ-Al2O3(111) catalyst to locally investigate the bonding between Pt and the γ-Al2O3 support. Differences in the aluminum L2,3-edge and oxygen K-edge EELS near-edge fine structure between spectra acquired at the Pt/γ-Al2O3(111) interface and the bulk γ-Al2O3 served as signatures of the interfacial bonding environment. Fine structure in the interface-localized Al-L2,3 edge suggested a larger fraction of tetrahedrally coordinated Al atoms at the Pt/γ-Al2O3(111) interface, which was confirmed by DFT simulations. The interface-localized O–K edge EELS revealed a prepeak associated with several types of oxygen bonding. To determine the specific interfacial O bonding, O–K edge EELS spectra were simulated from an array of Pt/γ-Al2O3(111) bonding configuration models. The simulated EELS from the interfacial bonding models revealed an O bonding motif consistent with the experimental O–K edge EELS fine structure." @default.
- W3017203618 created "2020-04-24" @default.
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- W3017203618 date "2020-04-13" @default.
- W3017203618 modified "2023-10-10" @default.
- W3017203618 title "Probing the Local Bonding at the Pt/γ-Al<sub>2</sub>O<sub>3</sub> Interface" @default.
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- W3017203618 doi "https://doi.org/10.1021/acs.jpcc.9b12029" @default.
- W3017203618 hasPublicationYear "2020" @default.
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