The promotional role of Mn in CO₂ hydrogenation over Rh-based catalysts from a surface organometallic chemistry approach.

ABSTRACT: Rh-based catalysts modified by transition metals have been intensively studied for CO₂ hydrogenation due to their high activity. However, understanding the role of promoters at the molecular level remains challenging due to the ill-defined structure of heterogeneous catalysts. Here, we constructed well-defined RhMn@SiO₂ and Rh@SiO₂ model catalysts via surface organometallic chemistry combined with thermolytic molecular precursor (SOMC/TMP) approach to rationalize the promotional effect of Mn in CO₂ hydrogenation. We show that the addition of Mn shifts the products from almost pure CH₄ to a mixture of methane and oxygenates (CO, CH₃OH, and CH₃CH₂OH) upon going from Rh@SiO₂ to RhMn@SiO

SUBMITTER: Zhou W 

PROVIDER: S-EPMC10207883 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature