Fig. 4

Catalytic performance. a Time-on-stream evolution of CO conversion for the Co@SiO2 catalysts. b Molar fraction distribution of FTS products from Co@SiO2-873 after 201 h on stream. Chain growth probability (α = 0.94) obtained from the ASF plot in the C15-C100 hydrocarbon range. Reaction conditions: 483 K, 20 bar, and H2/CO = 1, and syngas flow of 40 ml min−1