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Preparation method of CoO-coated carbon nanotube film with HER/OER bifunctional catalytic activity

A carbon nanotube film, bifunctional catalysis technology, applied in electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of inability to meet industrial applications, poor conductivity, high cost of HER catalysts, etc., and achieve good industrial application prospects and low cost. , high repeatability

Active Publication Date: 2021-07-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the present invention: The present invention provides a preparation method of CoO@CNTF with HER / OER bifunctional catalytic activity, which solves the problems caused by the poor conductivity of existing transition metal OER catalysts and the high cost of existing HER catalysts. It cannot meet the technical problems of industrial application

Method used

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  • Preparation method of CoO-coated carbon nanotube film with HER/OER bifunctional catalytic activity
  • Preparation method of CoO-coated carbon nanotube film with HER/OER bifunctional catalytic activity
  • Preparation method of CoO-coated carbon nanotube film with HER/OER bifunctional catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: After dissolving 16mmol of cobalt nitrate hexahydrate and 4mmol of 2-methylimidazole in 50mL of deionized water, put them into the reactor together with the carbon nanotube film, and obtain CoO@CNTF at 90°C for six hours Precursor. Wash with deionized water by ultracentrifugation until pH = 7, and then treat at high temperature in a tube furnace for two hours. figure 1 It is the SEM picture of the carbon fiber film. It can be seen that the diameter of a single tube is tens of nanometers, and the thickness distribution is uneven.

[0026] figure 2 It is (a) physical picture (b) SEM of CoO@CNTF carbonization product. It can be seen that ZIF67 grows on the carbon nanotube film, and the morphology is relatively uniform.

[0027] image 3 The HER performance diagram of the CoO@CNTF carbonization product was prepared for Example 1. The current density is 10mA / cm 2 The overpotential is -0.32V.

[0028] Figure 4 The OER performance diagram of the CoO@CNTF c...

Embodiment 2

[0031] The concentration of cobalt nitrate hexahydrate is 0.2mol / L, and other conditions are the same as in Example 1.

Embodiment 3

[0033] The concentration of cobalt nitrate hexahydrate is 0.8mol / L, and other conditions are the same as in Example 1.

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Abstract

The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method of a CoO-coated carbon nanotube film with HER / OER bifunctional catalytic activity, which is characterized by comprising the following steps: under a hydrothermal condition, growing an MOF precursor on the surface of each nanotube in a carbon nanotube film subjected to surface pretreatment, and then conducting carbonizing to obtain the electrode material with HER and OER dual-catalytic activity. The material has excellent HER and OER dual-catalytic activity and stable performance. The preparation method provided by the invention has the advantages of low raw material cost, simple preparation method, environmental friendliness and easiness in large-scale production, and overcomes the defect that the existing HER catalyst is high in preparation cost and difficult to meet industrial application.

Description

technical field [0001] The present invention relates to a preparation method of CoO@CNTF with HER / OER bifunctional catalytic activity, which is characterized in that the CoO@CNTF precursor is prepared under hydrothermal conditions, and the deionized water is ultra-centrifugal washed to PH=7 Then it is carbonized at high temperature to obtain an electrode material with dual catalytic activities for HER and OER. The preparation method has the advantages of cheap raw materials, simple preparation method, environmental friendliness, easy control and scale. Background technique [0002] The dwindling natural energy resources and the sharp increase in energy demand have made the development of new energy sources a hot topic for scientists. To seek efficient and sustainable energy conversion and storage solutions, electrocatalytic oxygen evolution and oxygen evolution have been very extensively studied in recent decades. Oxygen evolution reaction (OER) is a necessary and decisive...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/077C25B11/065
CPCC25B1/04Y02E60/36
Inventor 唐少春王亚婷张晟
Owner NANJING UNIV
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