Effects of Silica Modification (Mg, Al, Ca, Ti, and Zr) on Supported Cobalt Catalysts for H₂-Dependent CO₂ Reduction to Metabolic Intermediates.

ABSTRACT: Serpentinizing hydrothermal systems generate H₂ as a reductant and harbor catalysts conducive to geochemical CO₂ conversion into reduced carbon compounds that form the core of microbial autotrophic metabolism. This study characterizes mineral catalysts at hydrothermal vents by investigating the interactions between catalytically active cobalt sites and silica-based support materials on H₂-dependent CO₂ reduction. Heteroatom incorporated (Mg, Al, Ca, Ti, and Zr), ordered mesoporous silicas are applied as model support systems for the cobalt-based catalysts. It is demonstrated that all catalysts surveyed convert CO₂ to methane, methanol, carbon monoxide, and low-molecular-weight hydrocarbons at 180 °C and 20 bar, but with different activ

SUBMITTER: Belthle KS 

PROVIDER: S-EPMC9706562 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature