一种三嗪分子笼负载钯催化剂及其制备方法和应用
By encapsulating palladium nanoclusters in triazine molecular cages (TMC1), a Pd@TMC1 catalyst was prepared, which solved the problems of low conversion rate and poor selectivity of existing catalysts in the selective hydrogenation reaction of alkyne compounds. It achieved high activity and stability for the efficient conversion of phenylacetylene to styrene and is suitable for the hydrogenation reaction of various alkyne compounds.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2024-01-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing catalysts suffer from low conversion, poor selectivity, and insufficient stability in the selective hydrogenation of alkyne compounds. In particular, in the process of converting phenylacetylene to styrene, trace amounts of phenylacetylene can lead to a decrease in the strength of the polymer product and catalyst poisoning.
A palladium catalyst, Pd@TMC1, was supported on a triazine molecular cage. Palladium nanoclusters were encapsulated in the cavity of a large-sized triazine molecular cage, TMC1, through an in-situ reduction method to form a Pd@TMC1 composite catalyst. The electronic state of palladium was adjusted by utilizing the stable framework and abundant pyridine nitrogen groups of TMC1, thereby controlling the size and aggregation of palladium nanoclusters.
The catalyst achieved highly active, selective, and stable conversion of phenylacetylene to styrene at ambient temperature and pressure, with a conversion rate of 98.2% and a selectivity of 93%. Furthermore, the catalyst maintained high activity after recycling and is suitable for the selective hydrogenation of various alkyne compounds.
Smart Images
Figure CN118045629B_ABST