ArticleAngewandte Chemie (International ed. in English)2026
A Carbon-Induced Surface Reconstruction on an Operating Fischer-Tropsch Catalyst.
Article in Angewandte Chemie (International ed. in English), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Heterogeneous catalysts are often assumed to undergo substantial chemical and morphological changes under reaction conditions. However, obtaining information on the state of a catalyst surface at the usually applied high pressures is difficult. For the Co catalyst used in the industrial Fischer-Tropsch synthesis, a widely held view is that the surface experiences a carbon-induced roughening that is essential for its activity. We have tested this idea by performing the reaction on a Co(0001) surface with a sacrificial carbide layer. In situ scanning tunneling microscopy experiments at ∼1 bar synthesis gas and 473 K show that, at the increased C coverage, the surface does not undergo the predicted roughening. Instead, a unique carbon-induced reconstruction forms, consisting of triangular partial stacking faults in which C atoms occupy the fault lines. Density functional theory calculations reveal that the reconstruction is more stable than the roughened state. For the detectable range of C
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