Thermally Stable and Regenerable Platinum–Tin Clusters for Propane Dehydrogenation Prepared by Atom Trapping on Ceria

Xiong, Haifeng; Lin, Sen; Goetze, Joris; Pletcher, Paul; Guo, Hua; Kovarik, Libor; Artyushkova, Kateryna; Weckhuysen, Bert M.; Datye, Abhaya K.

doi:10.1002/ange.201701115

Title: Thermally Stable and Regenerable Platinum–Tin Clusters for Propane Dehydrogenation Prepared by Atom Trapping on Ceria

Journal Article · Wed Jun 28 00:00:00 EDT 2017 · Angewandte Chemie

DOI:https://doi.org/10.1002/ange.201701115· OSTI ID:1408256

^[1]; Lin, Sen ^[2]; Goetze, Joris ^[3]; Pletcher, Paul ^[3]; Guo, Hua ^[4]; Kovarik, Libor ^[5]; Artyushkova, Kateryna ^[1]; Weckhuysen, Bert M. ^[3];

^[1]

Department of Chemical &, Biological Engineering and Center for Microengineered Materials University of New Mexico Albuquerque NM 87131 USA
Research Institute of Photocatalysis State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou University Fuzhou 350002 China
Inorganic Chemistry and Catalysis Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
Department of Chemistry and Chemical Biology University of New Mexico Albuquerque NM 87131 USA
Environmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA 99352 USA

Abstract Ceria (CeO ₂ ) supports are unique in their ability to trap ionic platinum (Pt), providing exceptional stability for isolated single atoms of Pt. The reactivity and stability of single‐atom Pt species was explored for the industrially important light alkane dehydrogenation reaction. The single‐atom Pt/CeO ₂ catalysts are stable during propane dehydrogenation, but are not selective for propylene. DFT calculations show strong adsorption of the olefin produced, leading to further unwanted reactions. In contrast, when tin (Sn) is added to CeO ₂ , the single‐atom Pt catalyst undergoes an activation phase where it transforms into Pt–Sn clusters under reaction conditions. Formation of small Pt–Sn clusters allows the catalyst to achieve high selectivity towards propylene because of facile desorption of the product. The CeO ₂ ‐supported Pt–Sn clusters are very stable, even during extended reaction at 680 °C. Coke formation is almost completely suppressed by adding water vapor to the feed. Furthermore, upon oxidation the Pt–Sn clusters readily revert to the atomically dispersed species on CeO ₂ , making Pt–Sn/CeO ₂ a fully regenerable catalyst.

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Sponsoring Organization:: USDOE

OSTI ID:: 1408256

Alternate ID(s):: OSTI ID: 1374922

Journal Information:: Angewandte Chemie, Journal Name: Angewandte Chemie Vol. 129 Journal Issue: 31; ISSN 0044-8249

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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