Modifying the Reactivity of Single Pd Sites in a Trimetallic Sn-Pd-Ag Surface Alloy: Tuning CO Binding Strength.

ABSTRACT: Improving control over active-site reactivity is a grand challenge in catalysis. Single-atom alloys (SAAs) consisting of a reactive component doped as single atoms into a more inert host metal feature localized and well-defined active sites, but fine tuning their properties is challenging. Here, a framework is developed for tuning single-atom site reactivity by alloying in an additional inert metal, which this work terms an alloy-host SAA. Specifically, this work creates about 5% Pd single-atom sites in a Pd₃₃Ag₆₇(111) single crystal surface, and then identifies Sn based on computational screening as a suitable third metal to introduce. Subsequent experimental studies show that introducing Sn indeed modifies the electronic structure and chemical reactivity (measured b

SUBMITTER: Mohrhusen L 

PROVIDER: S-EPMC11600693 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature