Molecular-level insights into the electronic effects in platinum-catalyzed carbon monoxide oxidation.

ABSTRACT: A molecular-level understanding of how the electronic structure of metal center tunes the catalytic behaviors remains a grand challenge in heterogeneous catalysis. Herein, we report an unconventional kinetics strategy for bridging the microscopic metal electronic structure and the macroscopic steady-state rate for CO oxidation over Pt catalysts. X-ray absorption and photoelectron spectroscopy as well as electron paramagnetic resonance investigations unambiguously reveal the tunable Pt electronic structures with well-designed carbon support surface chemistry. Diminishing the electron density of Pt consolidates the CO-assisted O₂ dissociation pathway via the O*-O-C*-O intermediate directly observed by isotopic labeling studies and rationalized by density-functional theory calculat

SUBMITTER: Chen W 

PROVIDER: S-EPMC8617298 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature