Biomass-based carbon material loaded monatomic copper catalyst as well as preparation method and application thereof

Abstract

The invention discloses a biomass-based carbon material loaded monatomic copper catalyst and a preparation method thereof, and a method for synthesizing a 1, 3-diyne compound by oxidative coupling ofthe catalyst. The catalyst is composed of 0.01 wt%-3 wt% of metal monatomic copper, 70 wt%-90 wt% of a carbon-based carrier and 5 wt%-20 wt% of heteroatoms. The preparation method of the biomass-basedcarrier-loaded monatomic copper catalyst is simple, mild in condition and low in cost, and does not need a common subsequent pickling process. The cheap metal salt and self-doped heteroatom N are used for synergistic coordination, aggregation of metal in the high-temperature pyrolysis process is avoided, and monodispersion of metal atoms is achieved. The metal monatomic content is high, the dispersion is uniform, and the physicochemical structure is stable. The catalyst can take air as an oxidizing agent in oxidative coupling reaction, achieves high conversion rate and excellent substrate universality under alkali-free and ligand-free conditions, and realizes an oxidative cross-coupling reaction among aryl-aryl, aryl-alkyl and alkyl-alkyl differently substituted substrates.

Description

technical field [0001] The invention belongs to the field of catalytic organic synthesis, and in particular relates to a catalyst using a biomass-based nitrogen-doped carbon material to support a single metal copper atom, and a preparation method thereof, and the catalyst for synthesizing 1,3-diynes in catalytic oxidation coupling Compound use. Background technique [0002] 1,3-diyne compounds are abundant in nature and have been successfully extracted from plants, fungi, bacteria, insects and marine organisms. The 1,3-diyne structure has rigid structural units and unique electronic properties. It is an important class of structural units and substructures, and is widely used in organic synthesis, pharmaceutical production, and material development. It is an important organic synthesis intermediate, which can be used in the synthesis of linear conjugated acetylene oligomers, macromolecular compounds including heterocyclic compounds and olefins. 1,3-diyne compounds have exc...

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Problems solved by technology

However, due to its large specific surface energy, single atoms are easy to migrate and agglomerate, which poses many challenges in their synthesis.

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