Chinese scholars have made progress in the preparation of high-density "dynamic three-atom" cluster catalysts

Low-carbon olefin is an important chemical raw material for petrochemical industry
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The research team used atomic layer deposition (ALD) technology to prepare a high-loading Ni ₁ Cu ₂ tri-atom catalyst on gC ₃ N ₄ support by synergistic metal-support interaction and spatial confinement.
(Or 1,3-butadiene) shows excellent activity, selectivity and stability in selective hydrogenation reactions .
Various spectroscopic characterizations and theoretical calculations such as in-situ synchrotron radiation and atom-resolved energy loss spectroscopy show that the active metal Ni atom is confined by the hydroxyl group to form a Cu-OH-Ni-OH-Cu linear formula between two Cu atomic sites Structure, Ni atom sites can undergo dynamic structural changes during the hydrogenation reaction: when the reaction molecule is adsorbed, the chemical bond between the Ni atom and the carrier is broken and pulled away from the surface, facilitating subsequent hydrogenation to form monoolefin products; after the product is desorbed , Ni atoms return to the surface of the carrier and form a bond with the carrier ( Figure 1 ) .
The synergy of metal-support interaction and atomic confinement brings about dynamic structural changes in the catalytic process, which not only improves the catalytic activity by improving the adsorption of reaction molecules by the catalyst, but also the single Ni site further improves the selectivity and resistance of the catalyst.
Carbon deposition performance .

This strategy provides a new idea for the design of high-efficiency, stable and low-cost industrial hydrogenation catalysts in the future
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