What question did this study set out to answer?

To enhance stability and CO selectivity of Ni–Cu bimetallic catalysts for the reverse water–gas shift reaction.

February 2, 2026ChemCatChem

Exsolution‐Driven Spinel Ni–Cu Bimetallic Catalysts for RWGS Reaction: Compositional Tuning for Enhanced Stability and CO Selectivity

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Develops exsolution-driven Ni–Cu catalysts to enhance CO selectivity in RWGS, suggesting a new strategy for catalyst design.

To enhance stability and CO selectivity of Ni–Cu bimetallic catalysts for the reverse water–gas shift reaction.
Developed exsolution-driven spinel Ni–Cu catalysts.
Optimized the Ni/Cu ratio to improve catalytic activity and stability.
Performed in situ DRIFTS measurements to observe reaction intermediates under RWGS conditions.
Utilized physicochemical analyses like XRD and XPS to characterize catalysts.
The Ni 6 Cu 4 catalyst achieved over 90% CO selectivity and more than 40% CO 2 conversion at 500°C.
Maintained stable operation for over 100 hours.
Ni facilitates H 2 activation while Cu suppresses methanation.
Highest oxygen vacancy concentration and smallest metal particle size observed in the Ni 6 Cu 4 catalyst.

Kim et al. (2026) studied this question.

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