Interfacial Anchoring Ultrafine CuO x Nanoparticles on CeO 2 via Coordination Chemistry to Stabilize Cu + -O v -Ce 4+ Active Sites for CO Preferential Oxidation

species facilitated electron transfer, oxygen activation, and CO adsorption, synergistically boosting the catalytic performance via the Mars-van Krevelen mechanism. This work establishes a rational coordination chemistry-guided paradigm for designing high-performance catalysts with precisely engineered active sites.