Nitrogen-doped mesoporous SiC materials with catalytically active cobalt nanoparticles for the efficient and selective hydrogenation of nitroarenes

Abstract

Mesoporous nitrogen-doped silicon carbide catalysts with integrated cobalt nanoparticles (Co@N-SiC) were synthesized by the thermal decomposition of a microphase-separated block copolymer of polycarbosilane and polyethylene. The catalysts are highly active, reusable and offer selective hydrogenation of the nitro group in the presence of hydrogenation-sensitive functional groups.

In-Situ Synthesis and Characterization of Nanocomposites in the Si-Ti-N and Si-Ti-C Systems

“…By the synergistic cooperation between SiC or Si 3 N 4 —as a matrix—and a dispersed ceramic nanophase of different chemical composition—as a nano-precipitate—nanocomposites with peculiar physical and chemical properties (e.g., mechanical, electrical, optical, catalytic, etc.) that are of high scientific and technological importance can be generated [ 5 , 6 , 7 , 8 ].…”

Low temperaturein situformation of cobalt in silicon nitride toward functional nitride nanocomposites

“…1 In this category of energy-focused materials, advanced ceramics appear to be high value-added products with performances that are tailored via their rational and elaborate designs. [2][3][4][5][6] Ceramic processing methods based on molecular engineering and precursor chemistry are well appropriate approaches to design such materials that can reach performances far beyond those developed by more conventional synthesis routes. [7][8][9][10] A very convenient precursor route is the polymer derived ceramics and VN/Si N 34 compounds.…”

The Direct Synthesis of Imines, Benzimidazoles and Quinoxalines from Nitroarenes and Carbonyl Compounds by Selective Nitroarene Hydrogenation Employing a Reusable Iron Catalyst

“…Recently, Beller and co‐workers could show that heterogeneous catalysts based on abundantly available transition metals, such as iron and cobalt, can also mediate the highly selective hydrogenation of nitroarenes. Based on these initial findings, a variety of groups developed Co catalysts for the selective and efficient hydrogenation of nitroarenes . Efficient and selective iron catalysts are essentially unknown beside the initial key contributions…”

“…Benzimidazoles and quinoxalines are similarly important as well as the development of protocols for their synthesis. We have recently introduced a variety of SiCN‐metal nanocomposite catalysts and have, very recently, introduced highly active, selective and reusable cobalt catalysts …”