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Oxygen Storage by Tin Oxide Monolayers on Pt3Sn(111)

  • The high performance of platinum–tin catalysts for oxidation reactions has been linked to the formation of tin oxides at the metal surface, but little is known about the structure of these oxides or the chemical behavior that determines their catalytic properties. We show here how surface oxides on Pt3Sn(111) incorporate oxygen at the metal interface, which may be subsequently removed by reaction with CO. The storage mechanism, where oxygen uptake occurs without loss of interfacial Pt–Sn bonds, is enabled by the peculiar asymmetrical coordination state of Sn2+. O atoms are bound at pocket sites in the 2D oxide sheet between these outward-buckled Sn atoms and metallic Sn in the alloy surface below.

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Author: Lindsay R. MerteORCiD, Nicolas BraudORCiD, Lars BußORCiD, Malthe Kjær BisboORCiD, Harald J. WallanderORCiD, Jon-Olaf KrisponeitORCiD, Jan Ingo FlegeORCiD, Bjørk HammerORCiD, Jens FaltaORCiD, Edvin LundgrenORCiD
DOI:https://doi.org/10.1021/acs.jpcc.2c09041
ISSN:1932-7447
ISSN:1932-7455
Title of the source (English):The Journal of Physical Chemistry. C
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2023
Tag:GOFEE algorithm; Oxygen storage; low-energy electron microscopy (LEEM); microprobe low-energy electron diffraction (μ-LEED); scanning tunneling microscopy (STM)
Volume/Year:127
Issue number:6
First Page:2988
Last Page:2994
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
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