In-situ probing of the Fischer-Tropsch reaction on Co single crystal surfaces up to 1 bar.

ABSTRACT: The surface chemistry of the Fischer-Tropsch catalytic reaction over Co has still several unknows. Here, we report an in-situ X-ray photoelectron spectroscopy study of Co 0001 and Co( 101¯4 ), and in-situ high energy surface X-ray diffraction of Co 0001, during the Fischer-Tropsch reaction at 0.15 bar - 1 bar and 406 K - 548 K in a H₂/CO gas mixture. We find that these Co surfaces remain metallic under all conditions and that the coverage of chemisorbed species ranges from 0.4-1.7 monolayers depending on pressure and temperature. The adsorbates include CO on-top, C/-C_xH_y and various longer hydrocarbon molecules, indicating a rate-limiting direct CO dissociation pathway and that only hydrocarbon species participate in the chain growth. The accumulation of hy

SUBMITTER: Lomker P 

PROVIDER: S-EPMC11761050 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature