Modulating the strong metal-support interaction of single-atom catalysts via vicinal structure decoration.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35869061.
- Also identified by DOI 10.1038/s41467-022-31966-1 and PMC identifier 9307766.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Metal-support interaction predominately determines the electronic structure of metal atoms in single-atom catalysts (SACs), largely affecting their catalytic performance. However, directly tuning the metal-support interaction in oxide supported SACs remains challenging. Here, we report a new strategy to subtly regulate the strong covalent metal-support interaction (CMSI) of Pt/CoFe<sub>2</sub>O<sub>4</sub> SACs by a simple water soaking treatment. Detailed studies reveal that the CMSI is weakened by the bonding of H<sup>+</sup>, generated from water dissociation, onto the interface of Pt-O-Fe, resulting in reduced charge transfer from metal to support and leading to an increase of C-H bond activation in CH<sub>4</sub> combustion by more than 50 folds. This strategy is general and can be extended to other CMSI-existed metal-supported catalysts, providing a powerful tool to modulating the catalytic performance of SACs.