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Chinese scholars have made progress in the precise design of hydrogenation catalysts

 Last Update: 2021-11-14
 Source: Internet
 Author: User

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2 pentanol structure

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Supported metal nano-catalysts are an important class of catalysts, which are widely used in petrochemical, coal chemical, fine chemical, environmental and other fields
.

Achieving high selectivity is the key to achieving precise catalysis.

In response to the above-mentioned problems, the research group first used the characteristics of precise preparation of atomic layer deposition (ALD) technology to prepare Pt/SiO ₂ catalysts with different Pt particle sizes , and found that this series of catalysts are used in the selective hydrogenation of halogenated nitrobenzene.
The activity and selectivity of Pt particles are in a "seesaw" relationship with the size of the Pt particles
.

Through theoretical calculations, the adsorption and catalytic hydrogenation characteristics of the Pt(111), Pt(211), Pt ₅₅ and Pt ₁₄₇ model surfaces were comparatively studied, and the geometrical and electronic effects in the hydrogenation of p-chloronitrobenzene were revealed.

The unique geometric structure and electronic structure properties of the single-shell bimetal core-shell catalyst provide an effective strategy for the future design of catalysts that maintain high precious metal utilization, high chemical selectivity and high activity

Figure 1 Comparison of chloronitrobenzene catalytic performance of Pt monometal, AuPt alloy, Au@Pt core-shell structure catalyst, and model schematic diagram of monoatomic shell bimetallic catalyst

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