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  Electronic properties and charge transfer phenomena in Pt nanoparticles on γ-Al2O3: size, shape, support, and adsorbate effects

Behafarid, F., Ono, L. K., Mostafa, S., Croy, J. R., Shafai, G., Hong, S., et al. (2012). Electronic properties and charge transfer phenomena in Pt nanoparticles on γ-Al2O3: size, shape, support, and adsorbate effects. Physical Chemistry Chemical Physics, 14(33), 11766-11779. doi:10.1039/C2CP41928A.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0006-CD16-B Version Permalink: https://hdl.handle.net/21.11116/0000-000D-478F-3
Genre: Journal Article

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 Creators:
Behafarid, Farzad1, Author
Ono, L. K1, Author
Mostafa, S.1, Author
Croy, J. R.1, Author
Shafai, G.1, Author
Hong, S.1, Author
Rahman, T. S.1, Author
Bare, Simon R.2, Author
Roldan Cuenya, Beatriz1, Author           
Affiliations:
1Physics Department, University of Central Florida, ou_persistent22              
2UOP LLC, a Honeywell Company, Des Plaines, IL 60017, USA, ou_persistent22              

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 Abstract: This study presents a systematic detailed experimental and theoretical investigation of the electronic properties of size-controlled free and γ-Al2O3-supported Pt nanoparticles (NPs) and their evolution with decreasing NP size and adsorbate (H2) coverage. A combination of in situX-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 (H2) 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.

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Language(s): eng - English
 Dates: 2012-06-082012-06-282012-07-022012-09-07
 Publication Status: Issued
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/C2CP41928A
 Degree: -

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Title: Physical Chemistry Chemical Physics
  Abbreviation : Phys. Chem. Chem. Phys.
Source Genre: Journal
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Publ. Info: Cambridge, England : Royal Society of Chemistry
Pages: 14 Volume / Issue: 14 (33) Sequence Number: - Start / End Page: 11766 - 11779 Identifier: ISSN: 1463-9076
CoNE: https://pure.mpg.de/cone/journals/resource/954925272413_1