MOF-derived N-doped carbon composites embedded with Fe/Fe3C nanoparticles as highly chemoselective and stable catalysts for catalytic transfer hydrogenation of nitroarenes

Controllable assembly of Fe3O4–Fe3C@MC by in situ doping of Mn for CO2 selective hydrogenation to light olefins

“…2e are attributed to the Fe 3 C (031) and graphite (002) planes. 40,41 The Fe 3 C (031) (PDF#77-0255) plane was 0.201 nm, and the enlarged spacing indicated that a bigger ion than Fe is doped in the Fe 3 C crystal, which is consistent with the XRD results. The HAADF-STEM images are shown in Fig.…”

“…† The average size of Fe 3 C is 43.1 ± 6.2 nm, and the lattice fringes of 0.200, 0.205, and 0.340 nm correspond to the Fe 3 C (031), Fe 3 C (031), and graphite (002) planes, respectively. 40,41 The HR-TEM and HAADF-STEM images of 20%Zr-1.2Fe@MC are shown in Fig. S3.…”

Heterogeneous Iron-Catalyzed Aerobic Oxidative Cleavage of C–C Bonds in Alcohols to Esters

“…The distinct broad peaks at 25 and 43°indicate the generation of graphitic carbon after the pyrolysis at 900 °C. 39,40,49 Diffraction peaks at 44.7 and/or 44.9°are assigned to Fe and/or Fe 3 C. 41,44,49 To further study the structure of the Fe-NC-900 catalyst, the characterization was conducted by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray (EDX) mapping (Figure 2). The SEM image under UED mode showed the honeycomb mesoporous structure of the Fe-NC-900 catalyst (Figure 2a).…”

“…The X-ray diffraction (XRD) spectrum revealed the composition of the catalyst (Figure S1). The distinct broad peaks at 25 and 43° indicate the generation of graphitic carbon after the pyrolysis at 900 °C. ,, Diffraction peaks at 44.7 and/or 44.9° are assigned to Fe and/or Fe 3 C. ,, …”

“…In recent years, metal–N–C materials have emerged as promising catalysts for various organic transformations. − In this regard, we have demonstrated that carbon-supported cobalt–nitrogen materials constitute highly active catalysts for the cross-coupling of alcohols with amines to imines, the selective oxidation of alcohols to esters or nitriles, , and the oxidative cleavage of C–C bonds in alcohols to esters and that carbon-supported iron–nitrogen materials constitute catalysts for the oxidative cleavage of CC bonds in olefins to esters . On the basis of our recent investigations and our passionate interest in carbon-supported metal–nitrogen catalyst systems, we further explore the synthesis and application of novel carbon-supported iron–nitrogen catalyst systems for selective organic transformations.…”