Martin, DJ; Decarolis, D; Odarchenko, YI; Herbert, JJ; Arnold, T; Rawle, J; Nicklin, C; ... Beale, AM; + view all Martin, DJ; Decarolis, D; Odarchenko, YI; Herbert, JJ; Arnold, T; Rawle, J; Nicklin, C; Boyen, H-G; Beale, AM; - view fewer (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.

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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.

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