Graphene-supported palladium catalyst, preparation method and application thereof

A palladium catalyst and graphene technology, applied in chemical instruments and methods, preparation of organic compounds, physical/chemical process catalysts, etc., can solve the time-consuming and labor-intensive decolorization of activated carbon, the difficulty of uniform dispersion of reducing agents, and the large particle size of catalyst molecules and other problems, to achieve the effect of easy recycling and reuse, simplified post-processing operation, and small material particle size
CN105126830AActive Publication Date: 2015-12-09ANHUI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI UNIV OF SCI & TECH
Publication Date
2015-12-09

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Abstract

The invention discloses a graphene-supported palladium catalyst, which includes following raw materials, by volume, 2-10 parts of a material A, 30-50 parts of ethylene glycol, 100-150 parts of graphene and 5-20 parts of a KTiNbO5 nano sheet solution, wherein the material A includes the raw materials of PdCl2 and hydrochloric acid being 30-37% in concentration, wherein the weight / volume ratio of the PdCl2 to the hydrochloric acid is (0.01-0.1) g : (10-40) ml. The invention also provides the preparation method and an application of the graphene-supported palladium catalyst. In the invention, a conventional method of the graphene-supported palladium catalyst is replaced by the preparation method, which is free of surfactants, is small in particle size, is simple in operation, can be used in synthesis of cinnamic acid, is high in yield of cinnamic acid, is simple in separation and after-treatment, is mild in reaction conditions and is green and economical.
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Description

technical field

[0001] The invention relates to the technical field of graphene-supported palladium catalysts, in particular to a graphene-supported palladium catalyst and its preparation method and application. Background technique

[0002] Heck discovered the Heck reaction in 1972. Since the end of the 20th century, the Heck reaction has gradually developed into an increasingly widely used organic synthesis method. After entering the 20th century, the Heck reaction has been a research hotspot in catalytic chemistry and organic chemistry. The Heck reactants are mainly halogenated aromatic hydrocarbons (mainly iodine) reacting with alkenes containing α-electron-withdrawing groups catalyzed by Pd(0), Pd(II) or Pd-containing complex catalysts to generate aromatic alkenes. The reaction undergoes five steps: oxidative addition of Pd, coordination of Pd and double bonds, cis-coplanar insertion, cis-coplanar β-H elimination, and reductive elimination. In the reaction, Pd(0) was ...

Claims

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