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Design of Specific Acid-Base-Properties in CeO2-ZrO2-Mixed Oxides via Templating and Au Modification

1
Technische Universität Dresden, Chair of Technical Thermodynamics, Helmholtzstr. 14, 01062 Dresden, Germany
2
German Institute of Science and Technology-TUM Asia Pte Ltd, [email protected] Building 510 Dover Road #05-01, Singapore 139660, Singapore
*
Author to whom correspondence should be addressed.
Catalysts 2018, 8(9), 358; https://doi.org/10.3390/catal8090358
Received: 9 August 2018 / Revised: 23 August 2018 / Accepted: 24 August 2018 / Published: 27 August 2018
(This article belongs to the Special Issue Active Sites in Catalytic Reaction)
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Abstract

Ceria-zirconia mixed oxides and gold supported oxides exhibit very good thermal stability and catalytic activity, as well as great selectivity. This work has been focused on the controlled synthesis and characterization of cationic- and amphiphilic-templated ceria, zirconia, and ceria-zirconia mixed oxides from nitrate and iso-propoxide precursors, and ceria-zirconia mixed oxides modified with gold via the deposition precipitation method with urea. The characterization of the acidic and basic properties was carried out through two test reactions. A complete chemical and structural characterization of the materials was done using Atomic Absorption Spectroscopy (AAS), Brunauer-Emmet-Teller Surface Analysis (N2-BET), X-Ray Diffraction (XRD), NH3- Temperature Programmed Desorption (TPD)/CO2-TPD, and Fourier Transform Infrared Spectroscopy (FTIR). Template techniques led to the formation of high surface area mesoporous materials with high activity and thermal stability. In general, the acid sites density was decreased, whereas the basic site density was increased by modification with Au or incorporation of zirconia in case of mixed oxides. View Full-Text
Keywords: zirconia; ceria; gold supported catalysts; acid-base properties; template zirconia; ceria; gold supported catalysts; acid-base properties; template
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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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Glorius, M.; Markovits, M.A.C.; Breitkopf, C. Design of Specific Acid-Base-Properties in CeO2-ZrO2-Mixed Oxides via Templating and Au Modification. Catalysts 2018, 8, 358.

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