Supported palladium monatomic catalyst and application thereof in cinnamyl aldehyde selective hydrogenation
The technology of a supported palladium and a catalyst is applied in the selective hydrogenation of cinnamaldehyde, and in the field of the preparation of a supported palladium single-atom catalyst, it can solve the problems of low metal utilization rate and high catalyst cost, achieve high conversion rate and reduce catalyst costs. cost, the effect of ensuring catalytic performance
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Embodiment 1
[0030] This embodiment provides a supported palladium single-atom catalyst, which includes a support and an active component supported on the support, wherein the support is ceria nanorods, and the active component is single-atom palladium. The preparation method of this single-atom catalyst comprises the following steps:
[0031] Synthesis of cerium oxide nanorods: In the preparation method, the step of synthesizing cerium oxide nanorods is: adding aqueous solution of cerium nitrate hexahydrate and aqueous sodium hydroxide solution into the polytetrafluoroethylene lining, and vigorously stirring for 1 hour Finally, crystallize at 100°C for 24 hours, wash and dry, and finally bake at 300°C for 2 hours to obtain ceria nanorods, and the heating rate is 5°C / min;
[0032] Ultrasonic mixing: disperse the cerium oxide nanorods in a mixed solvent of deionized water and methanol and sonicate for 1 hour, then add the sodium tetrachloropalladate solution and continue to sonicate for 1 h...
Embodiment 2
[0040] The difference between this example and Example 1 is that in this example, in the step of ultrasonic mixing, the mixed solution was magnetically stirred at room temperature for 8 hours, and the mass ratio of ceria nanorods to sodium tetrachloropalladate was 200 :5.
Embodiment 3
[0042] The difference between this example and Example 1 is that in this example, in the step of ultrasonic mixing, the mixed solution was magnetically stirred at room temperature for 9 hours, and the mass ratio of ceria nanorods to sodium tetrachloropalladate was 300 :1.
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