Preparation Method of
Co<sub>3</sub>O<sub>4</sub> Nanoparticles Using Ordered Mesoporous
Carbons as a Template and Their Application for Fischer–Tropsch
Synthesis
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Abstract
Co<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) with
a narrow particle size distribution were fabricated via a facile and
novel method using mesoporous carbon materials (CMK-3, MSU-F-C) as
sacrificial templates. The particle size distribution of the Co<sub>3</sub>O<sub>4</sub> NPs varied depending on the pore size of the
templates. Synthesis of the NPs with concurrent complete removal of
the templates was achieved at 593 K, which is lower than the temperatures
utilized in previous reports. It was verified that the carbon template
was decomposed by catalytic oxidation with cobalt and NO<sub><i>x</i></sub> species generated by thermal decomposition of the
cobalt nitrate precursor in air. The prepared NPs, and particularly
the Co<sub>3</sub>O<sub>4</sub> NPs synthesized from CMK-3, acted
as excellent catalysts for the Fischer–Tropsch synthesis (FTS).
The high catalytic performance was associated with the optimum particle
size (6–10 nm) of the nanoparticles for FTS and enhanced reducibility