Cobalt and graphene composite nanometer material catalyst and preparation method thereof

A technology of graphene composite and nanomaterials, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc.

Active Publication Date: 2019-04-12
DALIAN UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

So far, there is no report on the simultaneous support of single-atom cobalt, cobalt clusters and cobalt oxide nanoparticles on graphene catalysts by impregnation-calcination method.

Method used

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  • Cobalt and graphene composite nanometer material catalyst and preparation method thereof

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with examples of characterization and test reactions, but the embodiments of the present invention are not limited thereto.

[0020] The graphene that adopts can adopt the reduced graphene oxide (reduced graphene oxide, rGO, be called for short graphene) from synthesis or commercial purchase; The reduced graphene oxide (rGO) that is used for synthetic catalyst in the present embodiment, be called for short graphene, can Using commercial graphene, it can also be self-synthesized according to the Hummers method. The rGO used in this example is self-synthesized, and the detailed steps are: take a dry 2.0L beaker, add 230mL of concentrated sulfuric acid and 5.0g of sodium nitrate (NaNO 3 ), placed in an ice bath and stirred, when the temperature T≤5°C, add 10.0g of natural flake graphite powder, and continue to stir for 2.5 hours; after mixing evenly, slowly add 30.0g of potassium permanganate (K...

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Abstract

The invention relates to a cobalt and graphene composite nanometer material catalyst and a preparation method thereof. The catalyst comprises the main components of cobalt and graphene; the preparation method includes the steps that a dipping method is adopted for loading cobalt salt onto reduction-oxidation graphene which is synthesized by itself or purchased commercially, after dipping, drying is conducted, a catalyst precursor containing cobalt salt / graphene is obtained and then calcinated in the atmosphere of nitrogen, the cobalt salt is degraded, meanwhile, a cobalt species and the graphene generate a strong interaction effect, and finally a cobalt and graphene composite nanometer material is obtained. The catalyst simultaneously contains single-atom cobalt, cobalt atom clusters and cobalt oxide nanometer particles.

Description

technical field [0001] The invention relates to a cobalt and graphene composite nano material catalyst, the main component of the catalyst and a preparation method of the catalyst. Background technique [0002] A good catalyst is the key to improving the performance of catalytic reactions. The performance of the catalyst is mainly determined by two aspects: one is the composition, and the other is the preparation method. The performance of the same ingredient using different preparation methods will vary greatly. Similarly, the same preparation method using different ingredients will also produce catalysts with different effects. In recent years, catalysts containing single atoms, atomic clusters, and nanoparticles with uniform particle size distribution have attracted more and more attention. By controlling the composition, structure, morphology, and electronic state of catalysts at the nanometer level, efficient catalysis can be achieved. The catalyst preparation technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75
CPCB01J23/75
Inventor 周锦霞杨帆毛璟博李慎敏
Owner DALIAN UNIV
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