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Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS

Martin, DJ; Decarolis, D; Odarchenko, YI; Herbert, JJ; Arnold, T; Rawle, J; Nicklin, C; ... Beale, AM; + view all (2017) Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS. Chemical Communications , 53 (37) pp. 5159-5162. 10.1039/c7cc01887h. Green open access

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Abstract

Periodically arranged, monodisperse gold nanoparticles supported on flat silicon substrates were studied for the hydrogenation of 1,3-butadiene under operando conditions using Grazing Incidence Small- and Wide-Angle X-ray Scattering (GISAXS/GIWAXS). It was found that the composition and shape of the nanoparticles depends very much on the chemical environment; the particles are shown to be dynamic, undergoing reversible size and shape change particularly during catalytic reaction, highlighting a dynamism often not observed in traditional studies. Specifically, the size of the Au nanoparticles increases during butadiene hydrogenation and this is attributed to the partial removal of a Au2O3 at the metal–oxide interface and consequential shape change of the nanoparticle from a more hemispherical particle to a particle with a larger height to width ratio.

Type: Article
Title: Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS
Open access status: An open access version is available from UCL Discovery
DOI: 10.1039/c7cc01887h
Publisher version: http://dx.doi.org/10.1039/c7cc01887h
Language: English
Additional information: This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence
Keywords: Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, Chemistry, Selective 1,3-Butadiene Hydrogenation, Gold Nanoparticles, Carbon-Monoxide, Particle-Size, Catalysts, Oxidation, Buta-1,3-Diene, Adsorption, Stability, Pressure
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1556065
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