Oxygen Storage by Tin Oxide Monolayers on Pt₃Sn(111)

Summary, in English

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.

• Author: Lindsay R. Merte; Nicolas Braud; Lars Bu; Malthe Kjær Bisbo; Harald J. Wallander; Jon Olaf Krisponeit; Jan Ingo Flege; Bjørk Hammer; Jens Falta; Edvin Lundgren
• Department/s: NanoLund: Centre for Nanoscience; LTH Profile Area: Nanoscience and Semiconductor Technology; Synchrotron Radiation Research; LTH Profile Area: Photon Science and Technology
• Publishing year: 2023
• Language: English
• Pages: 2988-2994
• Publication/Series: Journal of Physical Chemistry C
• Volume: 127
• Issue: 6
• Links: http://dx.doi.org/10.1021/acs.jpcc.2c09041
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Topic: Inorganic Chemistry
• Status: Published
• ISBN/ISSN/Other: ISSN: 1932-7447