A composite material with CeO2-ZrO2 nanocrystallines embedded in SiO2 matrices and its enhanced thermal stability and oxygen storage capacity
- 70 Downloads
A simple hydrothermal procedure is introduced, which leads to the successful synthesis of a new composite material with fine CeO2-ZrO2 nanocrystallites embedded in amorphous and porous SiO2 matrices. The composite material possesses an extraordinary high thermal stability. After being calcined at 1000 °C, it retains CeO2-ZrO2 nanocrystallites of the size around 5 nm, a BET-specific surface area of 165 m2/g, and an oxygen storage capacity of 468 μmol/g. No phase segregation for CeO2-ZrO2 nanocrystallites is detected and the SiO2 matrices remain not crystallized. The composite material shows a great potential as a support of three-way catalyst, as evidenced in catalytic tests with supported Pt.
KeywordsCeria-zirconia nanocrystallites Silica matrices Thermal stability Oxygen storage capacity Three-way catalyst
This work was financially supported by the National Natural Science Foundation of China (21576054) and the Scientific Project of Guangdong Province (2016B020241003).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Ali S, Chen L, Yuan F, Li R, Zhang T, Bakhtiar S u H, Leng X, Niu X, Zhu Y (2017) Synergistic effect between copper and cerium on the performance of Cux-Ce0.5-x-Zr0.5 (x=0.1–0.5) oxides catalysts for selective catalytic reduction of NO with ammonia. Appl Catal B Environ 210:223–234CrossRefGoogle Scholar
- Sahoo TR, Armandi M, Arletti R, Piumetti M, Bensaid S, Manzoli M, Panda SR, Bonelli B (2017) Pure and Fe-doped CeO2 nanoparticles obtained by microwave assisted combustion synthesis: physico-chemical properties ruling their catalytic activity towards CO oxidation and soot combustion. Appl Catal B Environ 211:31–45CrossRefGoogle Scholar
- Tsoncheva T, Ivanova R, Henych J, Dimitrov M, Kormunda M, Kovacheva D, Scotti N, Santo VD, Štengl V (2015) Effect of preparation procedure on the formation of nanostructured ceria–zirconia mixed oxide catalysts for ethyl acetate oxidation: homogeneous precipitation with urea vs template-assisted hydrothermal synthesis. Appl Catal A Gen 502:418–432CrossRefGoogle Scholar