Outstanding activity and selectivity of controlled size Pt nanoparticles over WO3 nanowires in ethanol decomposition reaction

Szabó, Mária and Halasi, Gyula and Sápi, András and Juhász, Koppány Levente and Kiss, János and Kukovecz, Ákos and Kónya, Zoltán (2019) Outstanding activity and selectivity of controlled size Pt nanoparticles over WO3 nanowires in ethanol decomposition reaction. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 19 (1). pp. 478-483. ISSN 1533-4880

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Abstract

Pt nanoparticles with controlled size of 1.5 and 6.5 nm were anchored onto the surface of WO 3 nanowires (WO 3 NW) as well as on MCF-17 silica. In the case of WO 3 NW and MCF-17 supported nanoparticles, 1.5 nm Pt nanoparticles were more active in ethanol decomposition reaction at 533 K. 6.5 nm Pt/WO 3 NW catalyst showed ∼6 times higher activity compared to MCF-17 sup- ported 6.5 nm Pt nanoparticles. While MCF-17 supported catalysts produced hydrogen, methane, carbon-monoxide and acetaldehyde, the tungsten-oxide supported Pt nanoparticles produced a huge amount of acetone as well as ethene with a high acetaldehyde selectivity besides H 2 , CH 4 and CO. The hydrogen formation was significantly higher when the Pt size was 1.5 nm. The metallic nanoparticles, the acid sites and the oxidized centers of support play important role in the formation of decomposition products of ethanol.

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