Catalytic Mechanisms on Ceria-Supported Metal Nanoparticles

Ceria (CeO₂) supports metal nanoparticles by offering a dynamic surface that can supply and remove oxygen atoms through its reversible Ce³⁺/Ce⁴⁺ redox cycle. This redox flexibility, coupled with abundant oxygen vacancies, enables strong metal–support interactions that activate reactant molecules at low temperatures. Metal atoms or small clusters dispersed on ceria exhibit modified electronic states relative to bulk metal, often becoming partially cationic and thereby enhancing adsorption of key intermediates. Reaction pathways typically proceed via adsorption of gas‐phase species at the metal–ceria interface, transformation through surface‐bound radicals or adatoms, and eventual release of products with concurrent restoration of oxygen vacancies. Tailoring nanoparticle size, shape and metal loading influences the balance between oxygen mobility in the oxide and metal electronic structure, thus governing activity and selectivity in processes ranging from CO oxidation and water–gas shift to methane activation. Recent advances have focussed on atomic‐scale mapping of active sites, real‐time observation of vacancy formation and computational microkinetic modelling to correlate surface structure with catalytic performance.

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Catalytic Mechanisms on Ceria-Supported Metal Nanoparticles publication trend

The graph below shows the total number of articles in catalytic mechanisms on ceria-supported metal nanoparticles across all publications each year (not limited to Nature Index journals).

Technical terms

Oxygen vacancy: A missing oxygen atom in the ceria lattice that creates a pair of electrons localised on neighbouring Ce ions, enabling redox activity.

Metal–support interaction: Electronic and structural coupling between metal nanoparticles and the oxide surface that modifies catalytic properties.

Redox cycle: Reversible reduction and oxidation of cerium ions (Ce³⁺/Ce⁴⁺) that supplies or removes lattice oxygen during catalysis.

Density functional theory (DFT): A quantum‐mechanical method used to compute electronic structure and predict reaction energetics on surfaces.

Microkinetic simulation: A computational framework that integrates elementary reaction rate data to model overall catalytic behaviour under realistic conditions.

Associative O₂ mechanism: A reaction pathway in which O₂ remains intact upon adsorption and reacts with a co‐adsorbed molecule before dissociation occurs.

References

1. Screening the optimal Cox/CeO2(110) (x = 1–6) catalyst for methane activation in coalbed gas. International Journal of Coal Science & Technology (2024).
2. A computational investigation of the adsorption of small copper clusters on the CeO 2 (110) surface. Physical Chemistry Chemical Physics (2021).
3. Dynamics of gold clusters on ceria during CO oxidation. Journal of Catalysis (2020).