Catalytic CO Oxidation by O-2 Mediated by Noble-Metal-Free Cluster Anions Cu2VO3bold-/bold5-

摘要

Catalytic CO oxidation by molecular O-2 is an important model reaction in both the condensed phase and gas-phase studies. Available gas-phase studies indicate that noble metal is indispensable in catalytic CO oxidation by O-2 under thermal collision conditions. Herein, we identified the first example of noble-metal-free heteronuclear oxide cluster catalysts, the copper-vanadium bimetallic oxide clusters Cu2VO3-5- for CO oxidation by O-2. The reactions were characterized by mass spectrometry, photoelectron spectroscopy, and density functional calculations. The dynamic nature of the Cu-Cu unit in terms of the electron storage and release is the driving force to promote CO oxidation and O-2 activation during the catalysis.