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  Identification of the surface species in electrochemical promotion: ethylene oxidation over a Pt/YSZ catalyst

Toghan, A., Greiner, M., Knop-Gericke, A., & Imbihl, R. (2021). Identification of the surface species in electrochemical promotion: ethylene oxidation over a Pt/YSZ catalyst. Physical Chemistry Chemical Physics, 23(38), 21591-21598. doi:10.1039/D1CP02757C.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-54FB-E Version Permalink: https://hdl.handle.net/21.11116/0000-0009-550C-B
Genre: Journal Article

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 Creators:
Toghan, Arafat1, 2, Author
Greiner, Mark3, Author
Knop-Gericke, Axel4, Author           
Imbihl, Ronald1, Author
Affiliations:
1Institut für Physikalische Chemie und Elektrochemie, Leibniz-Universität Hannover, Callinstrasse 3A, D-30167 Hannover, Germany , ou_persistent22              
2Chemistry Department, Faculty of Science, South Valley University, 83523 Qena, Egypt, ou_persistent22              
3Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34 – 36, 445470 Mülheim an der Ruhr, Germany , ou_persistent22              
4Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Abstract: The electrochemical promotion of the C2H4 + O2 total oxidation reaction over a Pt catalyst, interfaced to yttrium stabilized zirconia (YSZ), has been studied at 0.25 mbar and T = 650 K using near ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) as an in situ method. The electrochemical promoter effect is linked to the presence of a several layers thick graphitic overlayer that forms on the Pt surface in the presence of C2H4. Our NAP-XPS investigation reveals that electrochemical pumping of the Pt/YSZ catalyst, using a positive potential, leads to the spillover of oxygen surface species from the YSZ support onto the surface of the Pt electrode. Based on the XP spectra, the spillover species on Pt is identical to oxygen chemisorbed from the gas-phase.

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Language(s): eng - English
 Dates: 2021-06-182021-09-022021-09-062021-10-14
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/D1CP02757C
 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: 8 Volume / Issue: 23 (38) Sequence Number: - Start / End Page: 21591 - 21598 Identifier: ISSN: 1463-9076
CoNE: https://pure.mpg.de/cone/journals/resource/954925272413_1