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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus


IMPACT FACTOR 2018: 0.975
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2196-7156
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Volume 228, Issue 4-5

Issues

The Electronic Interaction of Pt-Clusters with ITO and HOPG Surfaces upon Water Adsorption

Joachim Klett
  • Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weis-Strasse 8, 64287 Darmstadt, Germany
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/ Stephan Krähling
  • Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weis-Strasse 8, 64287 Darmstadt, Germany
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/ Benjamin Elger
  • Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weis-Strasse 8, 64287 Darmstadt, Germany
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/ Rolf Schäfer
  • Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Alarich-Weis-Strasse 8, 64287 Darmstadt, Germany
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/ Bernhard Kaiser
  • Corresponding author
  • Institut für Material- und Geowissenschaften, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany
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/ Wolfram Jaegermann
  • Institut für Material- und Geowissenschaften, Technische Universität Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany
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Published Online: 2014-04-02 | DOI: https://doi.org/10.1515/zpch-2013-0499

Abstract

In 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.

Keywords: Water; Splitting; Cluster; Catalysis; Platinum; ITO

About the article

Accepted: 2014-02-26

Received: 2013-12-19

Published Online: 2014-04-02

Published in Print: 2014-05-28


Citation Information: Zeitschrift für Physikalische Chemie, Volume 228, Issue 4-5, Pages 503–520, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2013-0499.

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