High-dispersion single-atom Pd/mesoporous Al2O3 catalyst, and preparation method and application thereof
A catalyst, highly dispersed technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, etc., can solve problems such as poor ethylene selectivity, affecting catalyst service life, etc. Improved selectivity, high atomic utilization, and cost reduction
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Embodiment 1-5
[0033] Weigh P123 (0.2g, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, Mr=5800) in a beaker, slowly add 40mL of absolute ethanol dropwise, and stir to make P123 fully dissolve. Add 0.64mL of 37wt% hydrochloric acid + 0.2g of citric acid, aluminum isopropoxide (0.4g), seal with a polyethylene film, and continue stirring until completely dissolved. The solution was transferred to a Petri dish, covered with a polyethylene film with holes, and dried in an oven at 60°C for 48 hours to evaporate the absolute ethanol solvent to obtain a sponge-like sample. The sample was transferred to a porcelain crucible and baked in a muffle furnace at 400 °C for 4 h to obtain mesoporous Al 2 o 3 .
[0034] Weigh a certain amount of PdCl 2 Dissolve in concentrated hydrochloric acid, transfer to a volumetric flask, add a certain amount of deionized water to the corresponding scale, and prepare a chloropalladium acid solution with a mass concentration of palladium...
Embodiment 6
[0036] With reference to the operation of embodiment 5, the only difference is that the carrier is replaced by a specific surface area of 60m 2 / g of alumina to prepare a simple palladium-alumina catalyst.
Embodiment 7
[0038]With reference to the operation of Example 5, the only difference is that the carrier is replaced with a specific surface area of 420m 2 / g of alumina to prepare a simple palladium-alumina catalyst.
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