Size dependence of carbon-encapsulated iron-based nanocatalysts for Fischer—Trposch synthesis

The conversion from syngas derived non-petroleum recourses to liquid fuels and chemicals via Fischer—Tropsch synthesis (FTS) is regarded as an alternative potential route. Developing catalyst with controllable particle size clarifying effect are of significance promote the process. Herein, we engineered carbon-encapsulation structure restrict growth but avoid strong metal—support interactions. prepared carbon-encapsulated nanoparticles (Fe@C) showed a superior catalytic activity compared conventional carbon-supported (Fe/C). By tuning 3.0 9.1 nm, volcano-like trend iron time yield (FTY) peaked at 2659 µmol·gFe−1·s−1 obtained optimum 5.3 nm. According temperature-programmed reduction desorption results, linear relationship between apparent turnover frequency CO dissociation capacity was established. enhanced dissociative adsorption along weakened H2 activation on larger resulted in higher C5+ selectivity. This study provides strategy synthesize carbon supported metal catalysts insight into Fe-based FTS.