Journal Article

PUBDB-2025-00982

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In-situ probing of the Fischer-Tropsch reaction on Co single crystal surfaces up to 1 bar

Loemker, P. (Corresponding author)Extern* ; Degerman, D.Extern* ; Goodwin, C.Extern* ; Shipilin, M.Extern* ; Amann, P.Extern* ; Rodrigues, G. L. S.Extern* ; Garcia-Martinez, F.DESY* ; Rameshan, R.Extern* ; Gladh, J.Extern* ; Wang, H.-Y.Extern* ; Soldemo, M.Extern* ; Holm, A.Extern* ; Tober, S.DESY* ; Schober, J.-C.DESY* ; Jacobse, L.Extern* ; Vonk, V.DESY* ; Gleißner, R.DESY* ; Noei, H.DESY* ; Hegedues, Z.DESY* ; Stierle, A.DESY* ; Schlueter, C.DESY* ; Nilsson, A. (Corresponding author)Extern*

2025
Springer Nature [London]

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Please use a persistent id in citations: doi:10.1038/s41467-025-56082-8  doi:10.3204/PUBDB-2025-00982

Report No.: Horizon 2020

Abstract: The surface chemistry of the Fischer-Tropsch catalytic reaction over Co hasstill several unknows. Here, we report an in-situ X-ray photoelectron spectro-scopy study of Co 0001ð Þ and Co(1014), and in-situ high energy surface X-raydiffraction of Co 0001ð Þ, during the Fischer-Tropsch reaction at 0.15 bar - 1 barand 406 K - 548 K in a H2/CO gas mixture. We find that these Co surfacesremain metallic under all conditions and that the coverage of chemisorbedspecies ranges from 0.4–1.7 monolayers depending on pressure and tem-perature. The adsorbates include CO on-top, C/-CxHy and various longerhydrocarbon molecules, indicating a rate-limiting direct CO dissociationpathway and that only hydrocarbon species participate in the chain growth.The accumulation of hydrocarbon species points to the termination step beingrate-limiting also. Furthermore, we demonstrate that the intermediate surfacespecies are highly dynamic, appearing and disappearing with time delays afterrapid changes in the reactants’ composition.

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Contributing Institute(s):

1. Nanolab (FS-NL)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)

Experiment(s):

1. PETRA Beamline P22 (PETRA III)
2. PETRA Beamline P21.1 (PETRA III)
3. DESY NanoLab: Surface Spectroscopy

Appears in the scientific report 2025

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