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

James Martin, David, Decarolis, Donato, Odarchenko, Yaroslav I., Herbert, Jennifer J., Arnold, Thomas, Rawle, Jonathan, Nicklin, Chris, Boyen, Hans-Gerd and Beale, Andrew M. 2017. Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS. Chemical Communications 53 (37) , p. 5159. 10.1039/C7CC01887H

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 1359-7345
Date of First Compliant Deposit: 24 April 2019
Date of Acceptance: 13 April 2017
Last Modified: 25 Apr 2019 12:30
URI: http://orca.cf.ac.uk/id/eprint/121922

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