Distribution of Pt single atom coordination environments on anatase TiO₂ supports controls reactivity.

ABSTRACT: Single-atom catalysts (SACs) offer efficient metal utilization and distinct reactivity compared to supported metal nanoparticles. Structure-function relationships for SACs often assume that active sites have uniform coordination environments at particular binding sites on support surfaces. Here, we investigate the distribution of coordination environments of Pt SAs dispersed on shape-controlled anatase TiO₂ supports specifically exposing (001) and (101) surfaces. Pt SAs on (101) are found on the surface, consistent with existing structural models, whereas those on (001) are beneath the surface after calcination. Pt SAs under (001) surfaces exhibit lower reactivity for CO oxidation than those on (101) surfaces due to their limited accessibility to gas phase species. Pt SAs deposi

SUBMITTER: Zang W 

PROVIDER: S-EPMC10837418 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature