Enhancing CO Oxidation Rate via Electronic Tuning of CO Binding on Bimetallic Nanoparticle Catalysts

, a catalyst known to promote interfacial oxygen exchange. This promotion effect is mirrored in Pt-Ni and Pt-Cu systems, and CO-DRIFTS results confirm a general trend linking weakened CO binding to enhanced rates. Together, these results establish a direct link between reduced CO binding strength and enhanced CO oxidation rates, demonstrating that the rate promotion arises from electronic modification-induced reduced CO coverage rather than from metal oxide interface sites. This work illustrates that the design of a bimetallic catalyst based on electronic structure modifications complements the conventional focus on interfacial active sites.