Effect of the support morphology on the performance of Co nanoparticles deposited on metal–organic framework MIL-53(Al) in Fischer–Tropsch synthesis

Carbon-based catalysts for Fischer–Tropsch synthesis

“…6(d). [136][137][138][139][140][141][142][143] Kapteijn et al: developed Co@SiO 2 catalyst by a stepwise methodology of making use of a cobalt-containing MOFs as a hard template: 144 The first step is the impregnation and hydrolysis of TEOS molecules in the pores of ZIF-67: The second step is the pyrolysis of ZIF-67@SiO 2 in N 2 resulting in the Co@C-SiO 2 catalyst. The final step is the calcination of Co@C-SiO 2 in the air to remove carbon: This preparation method results in well-dispersed cobalt nanoparticles with sizes of 5-15 nm: The cobalt loading was as high as B50 wt% with cobalt oxide reducibility of the order of 80%: Most importantly, the obtained Co@SiO 2 catalyst showed higher activity than the traditional impregnated Co/SiO 2 counterpart ( Fig.…”

“…The obtained Co@MIL-53(Al) catalysts exhibited higher selectivity to the C 5 + hydrocarbons and lower selectivity to methane than conventional Co/Al 2 O 3 . 138 The Co nanoparticles were immobilized on MIL-53(Al) under H 2 flow at 400 1C without any degradation of the porous host matrix. In a follow-up study, they attempted to elucidate the influence of the morphology and particle size of the MIL-53(Al) on the catalytic performance of the subsequent Co-catalyst in FTS.…”

Dynamic behavior of metal nanoparticles in MOF materials: analysis with electron microscopy and deep learning

“…MOFs were synthesized according to published procedures. [76][77][78][79][80][81][82] The MIL-101(Fe) and NH 2 -MIL-101(Fe) samples were prepared by the MW technique under atmospheric pressure according to a modified previously reported procedure. 78 For the synthesis of MIL-101(Fe), benzene-1,4-dicarboxylic acid (H 2 BDC) (0.230 g, 1.38 mmol) was dissolved in N, N-dimethylformamide (DMF) (60 mL).…”

Zeolite-Like Boron Imidazolate Frameworks (BIFs): Synthesis and Application

“…There are a few general synthesis methods to embed M-NP in a porous solid, which involve the impregnation of a metal precursor, followed by its reduction to metal(0) atoms, which further aggregate into M-NP within the solid matrix. Depending on the metal and support nature, several reducing techniques are usually exploited, such as reduction in a hydrogen flow [112] in a combination with inert gases such as argon [113], thermal decomposition or the use of external reducing agents such as NaBH 4 [114]. In some cases, a supercritical CO 2 − methanolic solution has been used to load the precursor compound within a MOF followed by a heating process [115].…”