Core-shell catalysts, methods of making and using the same

By using a core-shell catalyst structure, with a nickel particle core and a multi-metal oxide coating layer on the outside, the problems of high-temperature sintering and carbon buildup blockage in nickel-based catalysts are solved, thereby achieving improved catalyst activity and stability.

CN122321969APending Publication Date: 2026-07-03CENT SOUTH UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Filing Date
2026-05-20
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing nickel-based catalysts are prone to sintering and carbon buildup at high temperatures, which can clog active sites, leading to decreased catalytic activity and shortened lifespan.

Method used

The catalyst employs a core-shell structure, with a core of highly active nickel particles and an outer layer of multi-metal oxide coating, including Al2O3, MgO, CeO2, TiO2, ZrO2, or La2O3. This structure suppresses high-temperature sintering and carbon deposition of the nickel core through physical confinement effects, and promotes the activation and dissociation of water to generate highly active hydroxyl species, thereby accelerating the oxidative transformation of intermediate products.

Benefits of technology

It improves the high-temperature structural stability and activity of the catalyst, extends its service life, enhances catalytic reaction efficiency, and inhibits carbon deposition.

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Abstract

This application provides a core-shell catalyst, its preparation method, and its application. The core-shell catalyst includes a core and a coating layer covering the core. The core includes nickel particles; the coating layer includes a first metal oxide and a second metal oxide. The first metal oxide includes at least one of Al₂O₃ and MgO; the second metal oxide includes at least one of CeO₂, TiO₂, ZnO, ZrO₂, and La₂O₃. The core-shell catalyst provided in this application, comprising a core and a coating layer, wherein the core includes highly active nickel, and the coating layer includes a first metal oxide and a second metal oxide, can effectively inhibit high-temperature sintering and carbon deposition of the core, promote water activation, and simultaneously promote the dispersion of active sites and sufficient contact between active sites and reactants, thereby achieving a simultaneous improvement in catalyst activity and stability.
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