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- W2024253500 abstract "Mesoporous ceria samples were prepared both by nanocasting using SBA-15 mesoporous silica as hard-template and by evaporation-induced self-assembly using F127 triblock copolymer as soft-template. The samples were characterized by TEM, XRD, TPR, XPS and nitrogen adsorption. Ceria prepared with hard-template appeared as arrays of connected rods with high specific surface area and highly defective internal structure that facilitates bulk reduction by hydrogen at temperature as low as 400 °C. The soft-template made sample exhibited morphology of three dimensionally linked filaments with low extent of internal defects. Hydrogen reduction of the soft-template made ceria was confined to the surface region for reduction temperature as high as 700 °C. The hard-template made ceria was much more active than the soft-template made ceria for benzene oxidation at low temperature, giving a T50 at 257 °C. The activity of the soft-template made ceria was greatly enhanced by etching with 2 M NaOH at 80 °C overnight. The high benzene oxidation activity of both the hard-template made and the sodium hydroxide treated soft-template made ceria were attributed to the generation of surface defects by the action of sodium hydroxide. The defect sites adsorb active oxygen that effect benzene oxidation below 300 °C." @default.
- W2024253500 created "2016-06-24" @default.
- W2024253500 creator A5008825782 @default.
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- W2024253500 date "2014-11-01" @default.
- W2024253500 modified "2023-09-26" @default.
- W2024253500 title "Comparison of the catalytic benzene oxidation activity of mesoporous ceria prepared via hard-template and soft-template" @default.
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- W2024253500 doi "https://doi.org/10.1016/j.micromeso.2014.07.054" @default.
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