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New Frontiers in Gold Catalyzed Reactions
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Catalysts 2017, 7(5), 134; doi:10.3390/catal7050134

Dynamic Processes on Gold-Based Catalysts Followed by Environmental Microscopies

1
Chemical Physics of Materials and Catalysis, Université libre de Bruxelles, CP243, 1050 Brussels, Belgium
2
Interdisciplinary Center for Nonlinear Phenomena and Complex Systems (CENOLI), Université libre de Bruxelles, 1050 Brussels, Belgium
*
Authors to whom correspondence should be addressed.
Academic Editors: Leonarda F. Liotta and Salvatore Scirè
Received: 30 March 2017 / Revised: 19 April 2017 / Accepted: 20 April 2017 / Published: 1 May 2017
(This article belongs to the Special Issue Gold Catalysts)

Abstract

Since the early discovery of the catalytic activity of gold at low temperature, there has been a growing interest in Au and Au-based catalysis for a new class of applications. The complexity of the catalysts currently used ranges from single crystal to 3D structured materials. To improve the efficiency of such catalysts, a better understanding of the catalytic process is required, from both the kinetic and material viewpoints. The understanding of such processes can be achieved using environmental imaging techniques allowing the observation of catalytic processes under reaction conditions, so as to study the systems in conditions as close as possible to industrial conditions. This review focuses on the description of catalytic processes occurring on Au-based catalysts with selected in situ imaging techniques, i.e., PEEM/LEEM, FIM/FEM and E-TEM, allowing a wide range of pressure and material complexity to be covered. These techniques, among others, are applied to unravel the presence of spatiotemporal behaviours, study mass transport and phase separation, determine activation energies of elementary steps, observe the morphological changes of supported nanoparticles, and finally correlate the surface composition with the catalytic reactivity. View Full-Text
Keywords: gold catalysis; Au-based catalysts; environmental microscopies; in situ microscopies; surface science; FEM; FIM; PEEM; LEEM; E-TEM gold catalysis; Au-based catalysts; environmental microscopies; in situ microscopies; surface science; FEM; FIM; PEEM; LEEM; E-TEM
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Genty, E.; Jacobs, L.; Bocarmé, T.V.; Barroo, C. Dynamic Processes on Gold-Based Catalysts Followed by Environmental Microscopies. Catalysts 2017, 7, 134.

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