Klett, Joachim ; Krähling, Stephan ; Elger, Benjamin ; Schäfer, Rolf ; Kaiser, Bernhard ; Jaegermann, Wolfram (2014)
The Electronic Interaction of Pt-Clusters with ITO and HOPG Surfaces upon Water Adsorption.
In: Zeitschrift für Physikalische Chemie, 228 (4-5)
doi: 10.1515/zpch-2013-0499
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
n order to investigate the catalytic properties of supported platinum clusters, their interaction with water was monitored using photoelectron spectroscopy. The clusters were exposed to up to five Langmuir of water at cryogenic temperatures. Additionally, the influence of the substrate was studied by employing HOPG and ITO as complementary support materials. In contrast to bulk platinum a distinct chemical shift is observable in the Pt4f binding energies for Pt clusters deposited on ITO. The same clusters on HOPG show no changes in binding energy. We propose that this trend is due to a change in the surface Fermi level in ITO, hence highlighting the strong interaction between the platinum cluster and the substrate material. Therefore it is reasonable to assume, that the catalytic efficiency of these clusters in general can not solely be described by the electronic structure of the cluster alone, but that also the electronic changes induced in the substrate may have a major impact on the catalytic performance as well.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Klett, Joachim ; Krähling, Stephan ; Elger, Benjamin ; Schäfer, Rolf ; Kaiser, Bernhard ; Jaegermann, Wolfram |
| Art des Eintrags: | Bibliographie |
| Titel: | The Electronic Interaction of Pt-Clusters with ITO and HOPG Surfaces upon Water Adsorption |
| Sprache: | Englisch |
| Publikationsjahr: | April 2014 |
| Verlag: | De Gruyter |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift für Physikalische Chemie |
| Jahrgang/Volume einer Zeitschrift: | 228 |
| (Heft-)Nummer: | 4-5 |
| DOI: | 10.1515/zpch-2013-0499 |
| Kurzbeschreibung (Abstract): | n order to investigate the catalytic properties of supported platinum clusters, their interaction with water was monitored using photoelectron spectroscopy. The clusters were exposed to up to five Langmuir of water at cryogenic temperatures. Additionally, the influence of the substrate was studied by employing HOPG and ITO as complementary support materials. In contrast to bulk platinum a distinct chemical shift is observable in the Pt4f binding energies for Pt clusters deposited on ITO. The same clusters on HOPG show no changes in binding energy. We propose that this trend is due to a change in the surface Fermi level in ITO, hence highlighting the strong interaction between the platinum cluster and the substrate material. Therefore it is reasonable to assume, that the catalytic efficiency of these clusters in general can not solely be described by the electronic structure of the cluster alone, but that also the electronic changes induced in the substrate may have a major impact on the catalytic performance as well. |
| Freie Schlagworte: | Water, Splitting, Cluster, Catalysis, Platinum, ITO |
| Zusätzliche Informationen: | Special Issue dedicated to Prof. Klaus Rademann on the occasion of his 60th birthday / Eckart Rühl and Helmut Baumgärtel, Berlin |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften 07 Fachbereich Chemie |
| Hinterlegungsdatum: | 27 Feb 2015 13:03 |
| Letzte Änderung: | 29 Mär 2015 17:14 |
| PPN: | |
| Sponsoren: | Financial support of this project by the DFG priority program SPP 1613 aswell as by the DFG Excellence Initiative, DarmstadtGraduate School of Energy Science and Engineering (GSC 1070) is gratefully acknowledged., We also thank the Helmholtz-Zentrum Berlin Electron Storage Ring BESSY II for provision of synchrotron radiation at beamlines U49-2 and TGM 7 and support of the travel costs. |
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