Design of PtZn nanoalloy catalysts for propane dehydrogenation through interface tailoring via atomic layer deposition. Issue 2 (7th December 2020)

• Record Type: Journal Article
• Authors: Ingale, Piyush; Knemeyer, Kristian; Preikschas, Phil; Ye, Mengyang; Geske, Michael; Naumann d'Alnoncourt, Raoul; Thomas, Arne; Rosowski, Frank
• Is Part Of: Catalysis science & technology. Volume 11:Issue 2(2021)
• Page Start: 484
• Page End: 493
• Publication Date: 2020-12-07
• Subjects: Catalysis -- Periodicals; 541.395
• DOI: 10.1039/d0cy01528h
• Languages: English
• ISSNs: 2044-4753

Abstract

Abstract : Synthetic approach for precise formation of PtZn bimetallic nano-alloys is reported, which are highly active and selective towards propane dehydrogenation. Abstract : Supported Pt nanoparticles are widely used for the catalytic dehydrogenation of propane to propene. Monometallic Pt catalysts are subject to fast deactivation. A successful strategy for stabilization is alloying Pt with a second metal. In this study, we present a novel approach for the precise formation of bimetallic nanoparticles via tailoring of the interface between metal nanoparticles and the support. An ultra-thin functional layer of ZnO is deposited via atomic layer deposition on SiO2 . The supported Pt nanoparticles undergo a phase transformation and form Pt1 Zn1 alloy nanoparticles under reductive thermal treatment. The resulting Pt1 Zn1 catalyst showed a high and stable selectivity to propene over 12 hours of time on stream. The activity of the Pt1 Zn1 catalyst was 1.5 times higher than that of a catalyst of the same composition prepared by incipient wetness impregnation. The nanoalloy formation causes electronic and geometric modification of Pt which reduces side reactions and leads to a stable and active propane dehydrogenation catalyst.