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Reversible restructuring of supported Au nanoparticles during butadiene hydrogenation revealed by operando GISAXS/GIWAXS
Authors:
David
Martin
(University College London; Research Complex at Harwell (RCaH); University of Amsterdam)
,
Donato
Decarolis
(University College London; Research Complex at Harwell (RCaH))
,
Yaroslav I.
Odarchenko
(University College London; Research Complex at Harwell (RCaH))
,
Jennifer J.
Herbert
(University College London; Research Complex at Harwell (RCaH); Netherlands Organisation for Scientific Research (NWO))
,
Thomas
Arnold
(Diamond Light Source)
,
Jonathan
Rawle
(Diamond Light Source)
,
Chris
Nicklin
(Diamond Light Source)
,
Hans-gerd
Boyen
(Hasselt University)
,
Andrew M.
Beale
(University College London; Research Complex at Harwell (RCaH))
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Chem. Commun.
, VOL 35
State:
Published (Approved)
Published:
April 2017
Diamond Proposal Number(s):
10488
,
12780
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.
Subject Areas:
Materials,
Chemistry
Instruments:
I07-Surface & interface diffraction