Synthesis of CeO2–ZrO2 solid solution by glycothermal method and its oxygen release capacity

Abstract

The glycothermal (GT) reaction of Ce acetate and Zr alkoxide directly yielded CeO2-ZrO2 solid solutions in a region of low Ce content ≤40 mol%. Of the CeO2-ZrO2 solid solutions obtained by the GT method and subsequent calcination at 500 or 800 ºC, the sample with 20 mol% Ce content had the largest BET surface area. This sample exhibited the highest Ce-based oxygen release capacity in the whole Ce/Zr composition range.The oxygen release capacities of CeO 2 -ZrO 2 solid solutions synthesized by the GT method were much larger than those of the samples prepared by a coprecipitation (CP) method. The Rietvelt analysis and the repetitive reduction-oxidation experiment indicated that the CeO 2 -ZrO 2 solid solution synthesized by the GT method has a homogeneous structure as compared with that prepared by the CP method.2

Synthesis of mesoporous ceria-based nanopowders for functional materials application

“…The resulting high surface area of mixed oxides was also attributed to the inhibition of the individual crystallization during precipitation [20], leading to smaller crystallites in size, as confirmed by XRD analysis, which can increase surface area and pore volume and change the pore size range in the mesoporous structure. Similar phenomena have been frequently observed [21,22]. It should be noted that zirconium addition leads to more developed surface of ceria than titanium addition.…”

Nanoshaped CuO/CeO2 Materials: Effect of the Exposed Ceria Surfaces on Catalytic Activity in N2O Decomposition Reaction

“…This difference is related to considerably lower BET specific surface area of CeO 2 -C solid compared to CeO 2 -P and CeO 2 -R samples, and as a result to lower fraction of reducible surface Ce 4+ ions. 36 If we consider the average CeO 2 crystallite size, calculated from XRD analysis as representative, then the H 2 amount consumed between 200-560 °C suffices for 0.9, 1.8 and 1.0 monolayers of CeO 2 reduction in CeO 2 -C, CeO 2 -R and CeO 2 -P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 samples, respectively, indicating that the assigned TPR signal indeed originates from surface CeO 2 reduction.…”

Comparison of Ni and Ni–Ce/Al2O3 catalysts in granulated and structured forms: Their possible use in the oxidative dehydrogenation of ethane reaction

“…The main role played by ceria is related to the generation of anionic vacancies and to the participation of reactive oxygen species, which can be tuned in the presence of other elements in the lattice [10,11]. The Ni-Ce combination has been studied for many reactions, e.g.…”