Electronic properties and charge transfer phenomena in Pt nanoparticles on -Al2O3: size, shape, support, and adsorbate effectsElectronic supplementary information (ESI) available. See DOI: 10.1039/c2cp41928a
This study presents a systematic detailed experimental and theoretical investigation of the electronic properties of size-controlled free and -Al 2 O 3 -supported Pt nanoparticles (NPs) and their evolution with decreasing NP size and adsorbate (H 2 ) coverage. A combination of in situ X-ray absorpti...
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| Main Authors | , , , , , , , , |
|---|---|
| Format | Journal Article |
| Language | English |
| Published |
01.08.2012
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| Online Access | Get full text |
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| Abstract | This study presents a systematic detailed experimental and theoretical investigation of the electronic properties of size-controlled free and -Al
2
O
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.
In situ
X-ray absorption near-edge structure and density functional theory calculations revealed changes in the electronic characteristics of Pt nanoparticles due to size, shape, nanoparticle-adsorbate (H
2
) and nanoparticle-support interactions. |
|---|---|
| AbstractList | This study presents a systematic detailed experimental and theoretical investigation of the electronic properties of size-controlled free and -Al
2
O
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.
In situ
X-ray absorption near-edge structure and density functional theory calculations revealed changes in the electronic characteristics of Pt nanoparticles due to size, shape, nanoparticle-adsorbate (H
2
) and nanoparticle-support interactions. |
| Author | Behafarid, F Croy, J. R Rahman, T. S Bare, Simon R Hong, S Mostafa, S Roldan Cuenya, B Shafai, G Ono, L. K |
| AuthorAffiliation | a Honeywell Company UOP LLC University of Central Florida Department of Physics |
| AuthorAffiliation_xml | – name: a Honeywell Company – name: University of Central Florida – name: UOP LLC – name: Department of Physics |
| Author_xml | – sequence: 1 givenname: F surname: Behafarid fullname: Behafarid, F – sequence: 2 givenname: L. K surname: Ono fullname: Ono, L. K – sequence: 3 givenname: S surname: Mostafa fullname: Mostafa, S – sequence: 4 givenname: J. R surname: Croy fullname: Croy, J. R – sequence: 5 givenname: G surname: Shafai fullname: Shafai, G – sequence: 6 givenname: S surname: Hong fullname: Hong, S – sequence: 7 givenname: T. S surname: Rahman fullname: Rahman, T. S – sequence: 8 givenname: Simon R surname: Bare fullname: Bare, Simon R – sequence: 9 givenname: B surname: Roldan Cuenya fullname: Roldan Cuenya, B |
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| DOI | 10.1039/c2cp41928a |
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| Title | Electronic properties and charge transfer phenomena in Pt nanoparticles on -Al2O3: size, shape, support, and adsorbate effectsElectronic supplementary information (ESI) available. See DOI: 10.1039/c2cp41928a |
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