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Preparation method of black phosphorus/cobalt tetroxide composite oxygen evolution electrocatalyst

A technology of cobalt tetroxide and electrocatalyst, which is used in electrodes, electrolysis components, electrolysis process and other directions to achieve the effect of overcoming poor stability, excellent long-term stability and mild synthesis conditions

Active Publication Date: 2022-07-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method that is simple and capable of mass-synthesizing BP and TMO composite oxygen evolution electrocatalysts. The synthesis route provided by the present invention has easy-to-obtain raw materials and low cost, mild conditions, simple equipment, easy operation and environmental friendliness , effectively overcome the cumbersome and harsh synthesis steps of the existing BP and TMO composite oxygen evolution electrocatalysts, especially solve the trouble of peeling off the bulk BP to generate BP nanosheets before the composite, and the prepared BP and TMO composite materials show Excellent electrocatalytic performance for oxygen evolution

Method used

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  • Preparation method of black phosphorus/cobalt tetroxide composite oxygen evolution electrocatalyst
  • Preparation method of black phosphorus/cobalt tetroxide composite oxygen evolution electrocatalyst
  • Preparation method of black phosphorus/cobalt tetroxide composite oxygen evolution electrocatalyst

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Effect test

Embodiment 1

[0030] When the mass ratio of black phosphorus to cobalt tetroxide is 2:5, and the ball milling time is 16h, the prepared oxygen evolution electrocatalyst.

[0031] (1) Accurately weigh 0.5g of commercial cobalt powder with a particle size of about 100-400nm in a 50ml ceramic crucible, and make it heat up to 550°C at a heating rate of 10°C / min in an air atmosphere. After heat treatment for 2 hours, the particle size is obtained. About 200 ~ 800nm ​​pure Co 3 O 4 nanomaterials.

[0032] figure 1 The Co prepared in this example 3 O 4 XRD patterns of nanomaterials, from figure 1 It can be seen that the commercial cobalt powder has been completely converted into Co after the high temperature oxidation process in the air 3 O 4 .

[0033] (2) Accurately weigh 0.4 g of the obtained Co at room temperature 3 O 4 and 0.16g of black phosphorus bulk. It was placed in a 200 ml vacuum ball milling jar containing 20 agate balls with a mass of 1.5 g and 80 agate balls with a mass o...

Embodiment 2

[0038] When the mass ratio of black phosphorus to cobalt tetroxide is 1:5, and the ball milling time is 16h, the prepared oxygen evolution electrocatalyst.

[0039] (1) Accurately weigh 0.5g of commercial cobalt powder with a particle size of about 100 to 400nm in a 50ml ceramic crucible, make it heat up to 550°C at a heating rate of 10°C / min in an air atmosphere, and obtain the particle size after heat treatment for 2 hours. About 200 ~ 800nm ​​pure Co 3 O 4 nanomaterials.

[0040] (2) Accurately weigh 0.4 g of Co obtained in (1) at room temperature 3 O 4 and 0.08g black phosphorus block. It was placed in a 200 ml vacuum ball milling jar containing 20 agate balls with a mass of 1.5 g and 80 agate balls with a mass of 0.3 g.

[0041] (3) Measure 100 ml of nitrogen-saturated oleyl amine and pour it into a ball mill, and after wet grinding at 500 rpm for 16 hours, centrifugation, alcohol washing and drying in an oxygen-free glove box to obtain black phosphorus nanosheets / ...

Embodiment 3

[0043] When the mass ratio of black phosphorus to cobalt tetroxide is 3:5, and the ball milling time is 16h, the prepared oxygen evolution electrocatalyst.

[0044] (1) Accurately weigh 0.5g of commercial cobalt powder with a particle size of about 100 to 400nm in a 50ml ceramic crucible, make it heat up to 550°C at a heating rate of 10°C / min in an air atmosphere, and obtain the particle size after heat treatment for 2 hours. About 200 ~ 800nm ​​pure Co 3 O 4 nanomaterials.

[0045] (2) Accurately weigh 0.4 g of Co obtained in (1) at room temperature 3 O 4 and 0.24g black phosphorus block. It was placed in a 200 ml vacuum ball milling jar containing 20 agate balls with a mass of 1.5 g and 80 agate balls with a mass of 0.3 g.

[0046] (3) Measure 100ml of nitrogen-saturated N,N-dimethylformamide and pour it into a ball mill. After wet grinding at 500 rpm for 16 hours, centrifuge, alcohol wash and dry in an oxygen-free glove box. , prepared black phosphorus nanosheets / coba...

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Abstract

The invention discloses a preparation method of a black phosphorus / cobalt tetroxide composite type oxygen evolution electrocatalyst. Cobalt powder is placed in a muffle furnace, and is oxidized in air to obtain cobalt tetroxide; Wet ball milling in organic solvent, centrifugation, alcohol washing and drying to obtain BP / Co 3 O 4 Composite oxygen evolution electrocatalyst, BP / Co disclosed in the present invention 3 O 4 The preparation method of the composite oxygen evolution electrocatalyst is safe and easy to control, with mild synthesis conditions, does not require harsh reaction conditions such as high temperature and high pressure, has the characteristics of convenient process and is conducive to large-scale production, and can be used for large-scale preparation of oxygen evolution electrocatalysts. catalyst.

Description

technical field [0001] The invention belongs to the field of novel energy material synthesis and electrocatalyst, in particular to a preparation method of a black phosphorus / cobalt tetroxide composite type oxygen evolution electrocatalyst. Background technique [0002] Severely retarded kinetics of oxygen evolution reaction (OER, 4OH-→O 2 +2H 2 O+4e-) is a key factor determining the performance of numerous clean energy conversion and storage devices such as zinc-air batteries. So far, noble metals and their alloys have been used as commercial electrocatalysts for OER reactions due to their high catalytic activity, but their high prices severely restrict the large-scale application of many clean energy devices. Based on this, non-metallic modified carbon materials, transition metals and their oxides, phosphides, sulfides, nitrides and many other non-precious metal materials have been widely studied in the field of oxygen evolution electrocatalysis in recent years. However,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B1/04
CPCC25B11/04C25B1/04Y02E60/36
Inventor 邹菁邹逸伦王海涛江吉周
Owner WUHAN INSTITUTE OF TECHNOLOGY
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