Gold Size Effect in the Thermal-Induced Reaction of CO2 and H2 on Titania- and Titanate Nanotube-Supported Gold Catalysts
In this paper, we study the thermal activation of CO2 on the surface of small Au nanoparticles supported on TiO2 and titanate nanotube. We characterize the catalysts with high resolution transmission electron microscopy (HR-TEM) and total gold content measurement.
We performed catalytic test in flow reactors then we investigate the surface of the catalysts during the adsorption and reaction processes by diffuse reflectance infrared spectroscopy (DRIFTS). The size of gold nanoparticles on the surface has been found to have the most important effect on
the final activity of the studied catalysts. Significantly higher TOF values were obtained when the size of Au were smaller on both TiO2 and titanate nanotube supports. The size of the Au nanoparticles with the method of their preparation was controlled. The gold adatom promotes
the adsorption and scission of CO2, but the nature of the support has got important effect, too. The explored reaction schemes may pave the way towards novel catalytic materials that can solve challenges associated with the activation of CO2 and thus contribute to a greener
chemistry related to it.
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Document Type: Research Article
Department of Physical Chemistry and Materials Science, University of Szeged, Aradi vértanúk tere 1, Szeged, H-6720, Hungary
Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged, H-6720, Hungary
Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged, H-6720, Hungary
Publication date: January 1, 2019
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