X-ray standing wave characterization of the strong metal-support interaction in Co/TiO_x model catalysts.

ABSTRACT: The strong metal-support interaction (SMSI) is a phenomenon observed in supported metal catalyst systems in which reducible metal oxide supports can form overlayers over the surface of active metal nanoparticles (NPs) under a hydrogen (H₂) environment at elevated temperatures. SMSI has been shown to affect catalyst performance in many reactions by changing the type and number of active sites on the catalyst surface. Laboratory methods for the analysis of SMSI at the nanoparticle-ensemble level are lacking and mostly based on indirect evidence, such as gas chemisorption. Here, we demonstrate the possibility to detect and characterize SMSIs in Co/TiO_x model catalysts using the laboratory X-ray standing wave (XSW) technique for a large ensemble of NPs at the bulk

SUBMITTER: Tiwari A 

PROVIDER: S-EPMC11001393 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature