Synergic Effect of Isolated Ce³⁺ and Pt^δ+ Species in UiO-66(Ce) for Heterogeneous Catalysis.

ABSTRACT: In this work, we have synthesized through an efficient electrostatic deposition a Pt single-atom catalyst (SAC) supported on a Ce-MOF. The basic solution employed in the impregnation process favors the deprotonation of the hydroxyl groups allocated on the clusters that can easily interact with the cationic Pt species. The resulting material, denoted as Pt/UiO-66(Ce), shows an increment of Ce³⁺ content, as demonstrated by UV-vis and Ce L₃-edge XANES spectroscopy. These Ce³⁺ species and their corresponding oxygen vacancies are able to accommodate very disperse Pt single sites. Moreover, Pt L₃-edge XANES and CO-FTIR spectroscopy confirm the cationic nature of the supported Pt^δ+ (2+ < δ < 4+). For comparison purpose, we have synthesized an

SUBMITTER: Rojas-Buzo S 

PROVIDER: S-EPMC10334465 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature