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- W2073752882 endingPage "9473" @default.
- W2073752882 startingPage "9464" @default.
- W2073752882 abstract "Extensive density function theory calculations are performed to study the mechanism of the formation of aldehyde and alcohol on Co surfaces in Fischer−Tropsch synthesis, a challenging issue in heterogeneous catalysis. Three possible pathways for the production of formaldehyde and methanol on flat and stepped Co(0001) surfaces are investigated: (i) CO + 4H → CHO + 3H → CH2O + 2H → CH3O + H → CH3OH; (ii) CO + 4H → COH + 3H → CHOH + 2H → CH2OH + H → CH3OH; and (iii) the coupling reactions of CH2 + O → CH2O and CH3 + OH → CH3OH. It is found that these pathways are generally favored at step sites, and the preferred mechanism is pathway (i) via CHO. Furthermore, the three traditional chain growth mechanisms in Fischer−Tropsch synthesis are semiquantitatively compared and discussed. Our results suggest that the two mechanisms involving oxygenate intermediates (the CO-insertion and hydroxycarbene mechanisms) are less important than the carbene mechanism in the production of long chain hydrocarbons. However, the CO-insertion mechanism may be responsible for the production of long-chain oxygenates." @default.
- W2073752882 created "2016-06-24" @default.
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- W2073752882 date "2008-06-01" @default.
- W2073752882 modified "2023-09-29" @default.
- W2073752882 title "A First-Principles Study of Oxygenates on Co Surfaces in Fischer−Tropsch Synthesis" @default.
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- W2073752882 doi "https://doi.org/10.1021/jp802242t" @default.
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