Tuning the Size of TiO₂-Supported Co Nanoparticle Fischer-Tropsch Catalysts Using Mn Additions.

ABSTRACT: Modifying traditional Co/TiO₂-based Fischer-Tropsch (FT) catalysts with Mn promoters induces a selectivity shift from long-chain paraffins toward commercially desirable alcohols and olefins. In this work, we use in situ gas cell scanning transmission electron microscopy (STEM) with energy-dispersive X-ray spectroscopy (EDS) elemental mapping, and near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) to demonstrate how the elemental dispersion and chemical structure of the as-calcined materials evolve during the H₂ activation heat treatment required for industrial CoMn/TiO₂ FT catalysts. We find that Mn additions reduce both the mean Co particle diameter and the size distribution but that the Mn remains dispersed on the support after the ac

SUBMITTER: Lindley M 

PROVIDER: S-EPMC11264206 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature