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Polyhedral cobalt phosphide/graphite carbon hybrid material and its preparation method and application

A hybrid material, cobalt phosphide technology, used in materials and energy fields, can solve the problems of large size of phosphide, easy agglomeration, reduced catalytic activity and stability, etc., and achieve large specific surface area, high catalytic activity and low cost. Effect

Active Publication Date: 2019-01-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cobalt phosphide with various shapes and structures such as nanoparticles, nanowires, and three-dimensional sea urchins have been prepared successively, these phosphides are large in size, and the nanowires and nanoparticles are easy to agglomerate when used, which leads to catalytic Reduced activity and stability

Method used

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  • Polyhedral cobalt phosphide/graphite carbon hybrid material and its preparation method and application
  • Polyhedral cobalt phosphide/graphite carbon hybrid material and its preparation method and application
  • Polyhedral cobalt phosphide/graphite carbon hybrid material and its preparation method and application

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Embodiment 1

[0017] Embodiment 1, polyhedral cobalt phosphide / graphite carbon hybrid material and its preparation method and application, comprises the following steps:

[0018] (1) Preparation of ZIF-67 template with polyhedral morphology: Weigh 1.46 g of cobalt nitrate hexahydrate and 1.64 g of 2-methylimidazole, dissolve them in 80 ml of methanol and ethanol mixed solution, stir and dissolve, and The cobalt nitrate solution was poured into the 2-methylimidazole solution. After stirring for 5 minutes, stand at room temperature for 24 hours, centrifuge the product, wash it twice with ethanol solution, and finally place it in a 60-degree drying oven. The obtained product is polyhedral ZIF-67. The product is blue-purple, mostly rhomboid dodecahedron in shape, and the particle size is about 1 micron.

[0019] (2) Polyhedral cobalt phosphide / graphite carbon hybrid material and its preparation: Weigh 200 mg of ZIF-67 and 200 mg of red phosphorus and place them on both ends of the porcelain bo...

Embodiment 2

[0022] Embodiment 2, the preparation method of polyhedral cobalt phosphide / graphite carbon hybrid material, comprises the following steps:

[0023] (1) Preparation of ZIF-67 template with polyhedral morphology: Weigh 1.46 g of cobalt nitrate hexahydrate and 1.64 g of 2-methylimidazole, dissolve them in 150 ml of methanol and ethanol mixed solution, stir and dissolve, and The cobalt nitrate solution was poured into the 2-methylimidazole solution. After stirring for 1 minute, stand at room temperature for 24 hours, centrifuge the product, wash twice with ethanol solution, and finally place it in a 60-degree drying oven. The obtained product is polyhedral ZIF-67. The product is blue-purple in shape, mostly in the shape of rhombic dodecahedron, and the particle size is between 1 and 2 microns.

[0024] (2) Polyhedral cobalt phosphide / graphite carbon hybrid material and its preparation: Weigh 200 mg of ZIF-67 and 200 mg of red phosphorus and place them on both ends of the porcelai...

Embodiment 3

[0027] Embodiment 3, the preparation method of polyhedral cobalt phosphide / graphite carbon hybrid material, comprises the following steps:

[0028] (1) Preparation of ZIF-67 template with polyhedral morphology: Weigh 1.46 g of cobalt nitrate hexahydrate and 1.64 g of 2-methylimidazole, dissolve them in 200 ml of methanol and ethanol mixed solution, stir and dissolve, and The cobalt nitrate solution was poured into the 2-methylimidazole solution. After stirring for 5 minutes, stand at room temperature for 24 hours, centrifuge the product, wash it twice with ethanol solution, and finally place it in a 60-degree drying oven. The obtained product is polyhedral ZIF-67. The product is blue-purple, mostly rhomboid dodecahedron in shape, and the particle size is about 3 microns.

[0029] (2) Polyhedral cobalt phosphide / graphite carbon hybrid material and its preparation: Weigh 200 mg of ZIF-67 and 200 mg of red phosphorus and place them on both ends of the porcelain boat respectively...

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Abstract

The invention belongs to the technical field of materials and energy sources and particularly provides a metal phosphide / graphite carbon hybrid material and a preparing method and application thereof. A cobalt base-metal organic framework (ZIF-67) is utilized as a template and directly reacts with red phosphorus through heating, and the cobalt phosphide / graphite carbon hybrid material with the strong interface coupling effect is prepared in an in-situ mode. The hybrid material is formed by uniformly distributing and embedding cobalt phosphide nanometer particles in a polyhedron graphite carbon matrix. When used in the oxygen evolution reaction as a catalyst, the hybrid material shows high catalytic activity. The synthetic method is easy to operate, low in production cost and capable of achieving large-scale preparation, and is a novel efficient and economic preparing method.

Description

technical field [0001] The invention belongs to the technical field of materials and energy, and in particular relates to a metal phosphide / graphite carbon hybrid material and its preparation method and application. Background technique [0002] With the increasing consumption of fossil energy and the increasing demand for energy, it is urgent to develop green and sustainable energy conversion and storage technologies. The use of clean energy such as solar wind and wind energy for hydrogen production by hydrolysis is a very promising means of comprehensive utilization of green energy. The anode reaction of water electrolysis involves a multi-step proton-coupled electron transfer process with slow reaction kinetics, so catalysts are needed to enhance the activity of the OER (oxygen evolution) reaction. The most ideal OER catalysts known so far are iridium (Ir) and ruthenium (Ru) and their oxides. However, due to the low crust content and high price of these noble metals, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J21/18
CPCB01J21/18B01J27/1853
Inventor 吴仁兵
Owner FUDAN UNIV
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