The influence of bulk stoichiometry on near-ambient pressure reactivity of bare and Pt-loaded rutile TiO₂(110).

ABSTRACT: The interaction of catalyst particles with reducible support materials can drastically change their reactivity. On rutile TiO₂, processes like particle encapsulation (caused by the "strong metal-support interaction", SMSI) have long been known to depend on the initial reduction state of the oxide. Despite this knowledge, sample stoichiometry has rarely been controlled in a reproducible manner in the surface science literature. Here, we use scanning tunnelling microscopy (STM) to explore systematically how near-ambient pressures (0.1-1.0 mbar) of O₂, H₂, CO and CO₂ affect blank and Pt-loaded rutile TiO₂(110) surfaces of different bulk stoichiometry at 600 K. To this end, we present preparation recipes that result in a sample stoichiomet

SUBMITTER: Kraushofer F 

PROVIDER: S-EPMC11381967 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature