Iron sulfide-catalyzed gaseous CO₂ reduction and prebiotic carbon fixation in terrestrial hot springs.

ABSTRACT: Understanding abiotic carbon fixation provides insights into early Earth's carbon cycles and life's emergence in terrestrial hot springs, where iron sulfide (FeS), similar to cofactors in metabolic enzymes, may catalyze prebiotic synthesis. However, the role of FeS-mediated carbon fixation in such conditions remains underexplored. Here, we investigate the catalytic behaviors of FeS (pure and doped with Ti, Ni, Mn, and Co), which are capable of H₂-driven CO₂ reduction to methanol under simulated hot spring vapor-zone conditions, using an anaerobic flow chamber connected to a gas chromatograph. Specifically, Mn-doped FeS increases methanol production five-fold at 120 °C, with UV-visible light (300-720 nm) and UV-enhanced light (200-600 nm) further increasing this activi

SUBMITTER: Nan J 

PROVIDER: S-EPMC11605115 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature