Bimetallic Ni–Cu catalyst supported on CeO2 for high-temperature water–gas shift reaction: Methane suppression via enhanced CO adsorption

[Display omitted] •Ni–Cu alloy phase exhibits high activity and selectivity toward WGSR.•Ni–Cu alloy enhances CO adsorption at high temperature, preventing CO dissociation.•Carboxyl associative mechanism is found as a dominant reaction pathway.•Carboxyl species is the main intermediate with formate...

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