Abstract
0.5CeO2/0.25CuO/3DOM SiO2 show very high CO oxidation activity up to 100% at 160 °C and excellent stability up to 12 h in the range 160 °C–240 °C, thanks to the increased active oxygen sites created by the synergistic effect between Cu2+ and Ce3+.
Highlights
Nowadays, air pollution caused by CO, such as in the cases of environmental emergency in core mining, metallurgy exhausts, and diesel submarine atmosphere, is extremely harmful to the environment and human health.[1,2] The influences of CO pollution, that is one of the most poisonous pollutions, need to be reduced or even eliminated imminently
We studied the phase structure, microstructure and surface chemical state of the composite catalysts and focused on the effect of different proportions of Ce and Cu loading on the physicochemical properties and catalytic activity of CeO2/CuO/ 3DOM SiO2 nanocomposites, aiming to design an effective and stable non-noble metal catalyst for low-temperature CO oxidation catalyst
The monodisperse PS microspheres were synthesized by surfactant-free emulsion polymerization, and the colloidal crystal template was formed by a centrifugal assembly strategy similar to the method of Tian et al.[29]
Summary
Air pollution caused by CO, such as in the cases of environmental emergency in core mining, metallurgy exhausts, and diesel submarine atmosphere, is extremely harmful to the environment and human health.[1,2] The influences of CO pollution, that is one of the most poisonous pollutions, need to be reduced or even eliminated imminently. The interaction between Ce3+ and Ce4+ can provide very high catalytic activity for surface redox reactions.[14,17] due to the weak oxidation mobility and easy sintering of pure CeO2, it is often doped or mixed with other metals to improve the catalytic performance. We studied the phase structure, microstructure and surface chemical state of the composite catalysts and focused on the effect of different proportions of Ce and Cu loading on the physicochemical properties and catalytic activity of CeO2/CuO/ 3DOM SiO2 nanocomposites, aiming to design an effective and stable non-noble metal catalyst for low-temperature CO oxidation catalyst. The CeO2/CuO/3DOM SiO2 composite catalyst was prepared by a simple grinding and calcination method.
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