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Preparation method and application of porous carbon @ cobaltosic oxide nanocomposite material

A nanocomposite material and composite material technology, which is applied in the field of preparation of porous carbon@cobalt tetroxide nanocomposite materials, can solve the problems of complex preparation process and unsatisfactory catalytic effect, and achieve a simple synthesis process, regular morphology and easy industrialization. Effect

Inactive Publication Date: 2018-01-09
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been many research reports on the electrocatalytic oxygen evolution of nanomaterials, but the catalytic effect is not very satisfactory, and the preparation process is relatively complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation method of a porous carbon@cobalt tetroxide nanocomposite material

[0026] (1) Under electric stirring, dissolve 17.0 g of acetone and 2.4 mmol of dicyandiamide into a clear solution, add 0.60 g of cobalt nitrate dissolved in an aqueous solution of 8 g of water, cool in an ice bath for 10 min, and stir at 300 rpm At a constant rate, a mixture of 22 mmol toluene diisocyanate and 8 g acetone was added dropwise, the temperature was raised to 30 °C, and the polymerization reaction was kept for 3 h. The obtained solid was dried in an oven at 70 °C to constant weight, and porous Co ( II) - polyphenylurea coordination polymer;

[0027] (2) Put the Co(II)-polyphenylurea coordination polymer in a tube furnace under an air atmosphere at a heating rate of 3°C / min, heat it to 300°C, keep it for 2.5 h, and then heat it at 2°C / min The cooling rate is cooled to room temperature, and the porous carbon @Co 3 o 4 nanocomposites.

Embodiment 2

[0028] Example 2 A preparation method of porous carbon@cobalt tetroxide nanocomposite material

[0029] (1) Under electric stirring, dissolve 17.0 g of acetone and 3.0 mmol of dicyandiamide into a clear solution, add 1.20 g of cobalt nitrate dissolved in an aqueous solution of 12 g of water, cool in an ice bath for 10 min, and then stir at a rate of 300 rpm , add 24mmol of toluene diisocyanate and 10g of acetone dropwise at a constant rate, raise the temperature to 30°C, heat-preserve the polymerization reaction for 3 hours, dry the obtained solid in an oven at 70°C to constant weight, and obtain porous Co(II) - Polyphenylurea coordination polymer;

[0030] (2) Put the Co(II)-polyphenylurea coordination polymer in a tube furnace under an air atmosphere at a heating rate of 5°C / min, heat it to 500°C, keep it for 1.5 h, and then heat it at 2°C / min The cooling rate is cooled to room temperature, and the porous carbon@cobalt tetroxide nanocomposite is prepared.

Embodiment 3

[0031] Example 3 A preparation method of porous carbon@cobalt tetroxide nanocomposite

[0032] (1) Under electric stirring, dissolve 17.0 g of acetone and 2.8 mmol of dicyandiamide into a clear solution, add 0.90 g of cobalt nitrate dissolved in an aqueous solution of 10 g of water, cool in an ice bath for 10 min, and stir at 300 rpm At a constant rate, a mixture of 23mmol toluene diisocyanate and 9 g of acetone was added dropwise, the temperature was raised to 30°C, and the polymerization reaction was kept for 3 h, and the obtained solid was dried in an oven at 70°C to constant weight, and porous Co ( II) - polyphenylurea coordination polymer;

[0033] (2) Put the Co(II)-polyphenylurea coordination polymer in a tube furnace under an air atmosphere at a heating rate of 4 °C / min, heat it to 400 °C, keep it for 2 h, and then heat it at 2 °C / min The cooling rate is cooled to room temperature, and the porous carbon@cobalt tetroxide nanocomposite is prepared.

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Abstract

The invention discloses a preparation method and application of a porous carbon @ cobaltosic oxide nanocomposite material, and belongs to the technical field of nanometer materials, high-molecular polymers and catalysts. The preparation method is characterized in that the coordination polymerization-pyrolysis method is adopted, so that the porous carbon @ Co3O4 nanocomposite material is prepared.According to the preparation method and application of the porous carbon @ cobaltosic oxide nanocomposite material, the raw material cost is low, the preparation process is simple, the reaction energyconsumption is low, and an industrial application prospect is achieved; and besides, the porous carbon @ cobaltosic oxide nanocomposite material is used for catalyzing water-electrolytic oxygen evolution, and further has a good oxygen evolution electrocatalytic activity and electrochemical stability.

Description

technical field [0001] The invention relates to a preparation method and application of a porous carbon@cobalt tetroxide nanocomposite material, and belongs to the technical field of nanomaterials, high molecular polymers and electrochemical oxygen evolution. Background technique [0002] Due to the wide range of hydrogen sources, clean utilization process, and good thermal conductivity, hydrogen has become a recognized clean energy carrier worldwide. In recent years, more and more people have paid more and more attention to the efficient development and utilization of hydrogen energy. . [0003] At present, there are many hydrogen production technologies. Hydrogen is produced by electrocatalytic water decomposition. The process is clean, the product is clean, and there is no harm to the environment. It can be called a green hydrogen production method. The electrocatalytic water splitting reaction includes two half-reactions, hydrogen evolution reaction (HER) and oxygen evo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCY02E60/36
Inventor 赵璐李树生
Owner UNIV OF JINAN
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