K⁺-Modified Redox Properties of the CuO_<i>x</i>/CeO₂ Catalyst for Highly Efficient CO Oxidation

CuOx/CeO2 is emerging as an effective catalyst for CO oxidation due to its unique redox properties; however, activity and stability still need be enhanced compared with supported platinum group metals. Here, approach demonstrated increase the performance resistance hydrocarbon inhibition through K+ modification of catalyst. The can improve electron transfer at metal–oxide interface, shifting equilibrium (Cu2+ + Ce3+ ↔ Cu+ Ce4+) right accelerate formation highly active species. reaction K+-modified was in same order magnitude noble metal Pt Pd catalysts. In addition, showed significantly improved inhibition. This work demonstrates a facile way tune properties binary transition oxides.