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Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode
Atomic hydrogen and oxygen adsorption on a platinum electrode in H /sub 2/SO/sub 4/ and HClO/sub 4/ electrolytes were studied by Pt L /sub 23/ XANES. The Pt electrode was formed of highly dispersed 1.5-3.0 nm particles supported on $9 carbon. A difference procedure utilizing the L/sub 2/ and L/sub 3...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
1999
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1107/S0909049599000035 http://cds.cern.ch/record/409722 |
_version_ | 1780894525745528832 |
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author | O'Grady, W E Ramaker, D E |
author_facet | O'Grady, W E Ramaker, D E |
author_sort | O'Grady, W E |
collection | CERN |
description | Atomic hydrogen and oxygen adsorption on a platinum electrode in H /sub 2/SO/sub 4/ and HClO/sub 4/ electrolytes were studied by Pt L /sub 23/ XANES. The Pt electrode was formed of highly dispersed 1.5-3.0 nm particles supported on $9 carbon. A difference procedure utilizing the L/sub 2/ and L/sub 3/ spectra at various applied voltages was used to isolate the electronic and geometric effects in the XANES spectra. At 0.54 V (relative to RHE) the Pt electrode in $9 HClO/sub 4/ is assumed to be "clean". By taking the difference between the spectra at 0.0 and 0.54 V, the Pt-H antibonding state (electronic effect) is isolated and found to have a Fano-resonance line shape. In addition, a $9 significant Pt-H EXAFS scattering (geometric effect) was found for photon energies 0 to 20 eV above the edge. The difference between the spectra at 1.14 and 0.54 V allows isolation of the Pt-O antibonding state and the Pt-O EXAFS $9 scattering. (7 refs). |
id | cern-409722 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1999 |
record_format | invenio |
spelling | cern-4097222019-09-30T06:29:59Zdoi:10.1107/S0909049599000035http://cds.cern.ch/record/409722engO'Grady, W ERamaker, D EShape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrodeXXAtomic hydrogen and oxygen adsorption on a platinum electrode in H /sub 2/SO/sub 4/ and HClO/sub 4/ electrolytes were studied by Pt L /sub 23/ XANES. The Pt electrode was formed of highly dispersed 1.5-3.0 nm particles supported on $9 carbon. A difference procedure utilizing the L/sub 2/ and L/sub 3/ spectra at various applied voltages was used to isolate the electronic and geometric effects in the XANES spectra. At 0.54 V (relative to RHE) the Pt electrode in $9 HClO/sub 4/ is assumed to be "clean". By taking the difference between the spectra at 0.0 and 0.54 V, the Pt-H antibonding state (electronic effect) is isolated and found to have a Fano-resonance line shape. In addition, a $9 significant Pt-H EXAFS scattering (geometric effect) was found for photon energies 0 to 20 eV above the edge. The difference between the spectra at 1.14 and 0.54 V allows isolation of the Pt-O antibonding state and the Pt-O EXAFS $9 scattering. (7 refs).oai:cds.cern.ch:4097221999 |
spellingShingle | XX O'Grady, W E Ramaker, D E Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title | Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title_full | Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title_fullStr | Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title_full_unstemmed | Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title_short | Shape resonances and EXAFS scattering in the $Pt L_{2,3}$ XANES from a Pt electrode |
title_sort | shape resonances and exafs scattering in the $pt l_{2,3}$ xanes from a pt electrode |
topic | XX |
url | https://dx.doi.org/10.1107/S0909049599000035 http://cds.cern.ch/record/409722 |
work_keys_str_mv | AT ogradywe shaperesonancesandexafsscatteringintheptl23xanesfromaptelectrode AT ramakerde shaperesonancesandexafsscatteringintheptl23xanesfromaptelectrode |