Preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres

A three-dimensional flower-shaped, nano-sheet technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of simple operation, good experimental reproducibility, and easy operation
CN104773764AInactive Publication Date: 2015-07-15BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2015-07-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres, and relates to the technical field of multi-level structured nano-grade catalyst materials. First, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are adopted as a nickel source and a cobalt source, a deionized water-isopropanol mixed phase with a proper proportion is adopted as a solvent, methanol is adopted as a reactant, and no additional base precipitating agent is adopted; a three-dimensional flower-shaped nano-sheet microsphere precursor is prepared in a Ni<2+>-Co<2+>-NH3-NH4<+>-SG<n->-H2O-IPA-CH3OH system (SG<n-> is CO3<2-> or HCOO<->); the temperature is increased to 300-400 DEG C in an air atmosphere with a speed of 1 DEG C / min, and the precursor is calcined for 2-3h, such that the three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are obtained. According to the invention, co-precipitation of the formulated cobalt and nickel in the raw materials is realized. The prepared three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are spinel cubic phases with high purity, and are formed by ultrathin nano-sheet self-assembly. The microspheres comprise rich mesopores, and have a large specific surface area. The method has the advantages of simple operation, appropriate conditions and easy control.
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Description

technical field

[0001] The invention belongs to the technical field of multi-level structure nano-catalyst materials, and in particular provides a preparation method of three-dimensional flower-shaped nickel cobaltate nanosheet mesoporous microspheres. Background technique

[0002] The study of Direct Methanol Fuel Cell (DMFC) began in the 1950s. Methanol has attracted widespread attention due to its cheap and easy to obtain, easy to carry, and energy density close to that of gasoline. At present, most of the anode catalysts used are platinum, ruthenium, gold and other noble metals and their binary or multi-component composite materials. However, noble metals have disadvantages such as high price, limited resources, and easy CO poisoning, which seriously affect the commercial application of DMFC. Therefore, finding non-precious metal electrocatalysts with good catalytic activity, high stability and low cost as an alternative anode catalyst has become an important research di...

Claims

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