Direct pathway towards long-chain alcohols and olefins by FTS - Atomistic origin of Mn promotion in Co-based FTS catalysts

Recently, it was discovered that the presence of manganese (Mn) in cobalt (Co)-based Fischer-Tropsch (FT) catalysts can shift the selectivity of products from traditional FT products to long chain alcohols in syngas mixtures (CO+H2). Using surface organometallic chemistry, which has proven effective for synthesizing model catalysts for various reactions, we created Mn-doped Co nanoparticles on TiO2 with tailored surfaces and interfaces to investigate the origin of this Mn effect. We wish to use ex situ and in situ X-ray absorption spectroscopy to understand the interplay between Co and Mn. By combining in situ XAS with other spectroscopic, microscopic, and physico-chemical techniques, and by linking to catalytic data, we hope to better comprehend the Mn effect. As Mn has gained attention as a promoter in various catalytic systems, this study is of interest to a broader audience in heterogeneous catalysis.