Title

Electronic Properties And Charge Transfer Phenomena In Pt Nanoparticles On Γ-Al 2O 3: Size, Shape, Support, And Adsorbate Effects

Abstract

This study presents a systematic detailed experimental and theoretical investigation of the electronic properties of size-controlled free and γ-Al 2O 3-supported Pt nanoparticles (NPs) and their evolution with decreasing NP size and adsorbate (H 2) coverage. A combination of in situ X-ray absorption near-edge structure (XANES) and density functional theory (DFT) calculations revealed changes in the electronic characteristics of the NPs due to size, shape, NP-adsorbate (H 2) and NP-support interactions. A correlation between the NP size, number of surface atoms and coordination of such atoms, and the maximum hydrogen coverage stabilized at a given temperature is established, with H/Pt ratios exceeding the 1:1 ratio previously reported for bulk Pt surfaces. © 2012 the Owner Societies.

Publication Date

9-7-2012

Publication Title

Physical Chemistry Chemical Physics

Volume

14

Issue

33

Number of Pages

11766-11779

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1039/c2cp41928a

Socpus ID

84864659043 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84864659043

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