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Co3V2O8 bifunctional electro-catalytic material as well as preparation method and application thereof

An electrocatalytic material and dual-function technology, applied in the field of electrocatalytic materials, can solve the problem of no one-dimensional shape, etc., and achieve the effect of low raw material cost, excellent performance, and large limit current density

Pending Publication Date: 2022-01-21
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the patent is prepared by hydrothermal method Co 3 V 2 o 8 , although different morphologies such as solid spheres, regular hexagonal sheets and pencil tips are obtained, but no one-dimensional morphologies

Method used

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  • Co3V2O8 bifunctional electro-catalytic material as well as preparation method and application thereof
  • Co3V2O8 bifunctional electro-catalytic material as well as preparation method and application thereof
  • Co3V2O8 bifunctional electro-catalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a Co 3 V 2 O 8 The preparation method of bifunctional electrocatalytic material comprises the following steps:

[0047] (1) 0.44g of cobalt nitrate hexahydrate, 0.12g of ammonium metavanadate and 1g of citric acid were dissolved in 14mL of deionized water, and then 1.5mL of hydrochloric acid with a mass concentration of 37wt% was added dropwise, and stirred for 120min to obtain a precursor solution.

[0048] (2) Weigh 0.8 g of polyvinylpyrrolidone (PVP) and dissolve it in 10 mL of absolute ethanol, and stir evenly; then add 2 mL of the precursor solution obtained in step (1) into it to obtain a precursor sol; place the obtained precursor sol in a The pressure is 20 kV, the relative humidity is 30%, electrospinning is performed at room temperature, the spinning receiving distance is 20 cm, and the advancing speed is 1 mL / h to obtain the precursor fiber.

[0049] (3) drying the precursor fiber obtained in step (2) at 40°C for 12 hours, then placing it in a tube furnace...

Embodiment 2

[0053] a Co 3 V 2 O 8 The preparation method of bifunctional electrocatalytic material comprises the following steps:

[0054] (1) 0.44g of cobalt nitrate hexahydrate, 0.12g of ammonium metavanadate and 1g of citric acid are dissolved in 14mL of deionized water, then 1.5mL of nitric acid with a mass concentration of 66wt% is added dropwise, and stirred for 120min to obtain a precursor solution;

[0055] (2) Weigh 1.2 g of polyvinylpyrrolidone (PVP) and dissolve it in 15 mL of absolute ethanol, and stir evenly; then add 3 mL of the precursor solution obtained in step (1) into it to obtain a precursor sol; place the obtained precursor sol in a The pressure is 25kV, the relative humidity is 30%, electrospinning is performed at room temperature, the spinning receiving distance is 15cm, and the advancing speed is 1.2mL / h, to obtain the precursor fiber.

[0056] (3) drying the precursor fiber obtained in step (2) at 50 °C for 16 h, then placing it in a tube furnace, heating up to...

Embodiment 3

[0058] a Co 3 V 2 O 8 The preparation method of bifunctional electrocatalytic material comprises the following steps:

[0059] (1) 0.5g of cobalt nitrate hexahydrate, 0.134g of ammonium metavanadate and 1.145g of citric acid were dissolved in 16mL of deionized water, and then 2mL of acetic acid with a mass concentration of 99wt% was added dropwise, and stirred for 150min to obtain a precursor solution;

[0060] (2) Weigh 0.9 g of polyvinylpyrrolidone (PVP) and dissolve it in 12 mL of absolute ethanol, and stir evenly; then add 2 mL of the precursor solution obtained in step (1) into it to obtain a precursor sol; place the obtained precursor sol in a The pressure is 20 kV, the relative humidity is 30%, electrospinning is performed at room temperature, the spinning receiving distance is 15 cm, and the advancing speed is 1 mL / h to obtain the precursor fiber.

[0061] (3) drying the precursor fiber obtained in step (2) at 60 °C for 12 h, then placing it in a tube furnace, heati...

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Abstract

The invention relates to a Co3V2O8 bifunctional electro-catalytic material as well as a preparation method and application thereof, which belongs to the technical field of electro-catalytic materials. The Co3V2O8 bifunctional electro-catalytic material is prepared by combining a sol-gel method with an electrostatic spinning technology; the micro-morphology of the electrocatalytic material is nanofiber, and the diameter of the nanofiber is 100-200 nm. The Co3V2O8 electro-catalytic material not only has excellent oxygen reduction (ORR) performance, but also has excellent hydrogen evolution (OER) performance, the preparation method is simple, and the Co3V2O8 electro-catalytic material has a good application prospect.

Description

technical field [0001] The present invention relates to a Co 3 V 2 O 8 A bifunctional electrocatalytic material and a preparation method and application thereof belong to the technical field of electrocatalytic materials. Background technique [0002] With the increase of population, rapid economic development and accelerated industrialization, fossil energy such as coal, oil and natural gas is facing the problem of short supply. At the same time, environmental pollution has become an increasingly serious global crisis. Therefore, the development of renewable clean energy to replace fossil fuels can effectively alleviate environmental pressure. Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are electrochemical classical catalytic reactions. Oxygen reduction reaction (ORR) is an important reaction in metal-air batteries, and as the cathode reaction of fuel cells directly affects the conversion efficiency of fuel cells. Oxygen evolution reaction (OER...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/06B01J35/02B01J23/847C01G51/00H01M4/90H01M4/88C25B1/04C25B11/075C25B11/091B01J35/00
CPCB01J23/8472B01J23/002C01G51/00H01M4/9016H01M4/8878C25B1/04C25B11/091C25B11/075C01P2002/72C01P2004/03B01J35/58B01J35/33B01J35/40Y02E60/36Y02E60/50
Inventor 卢启芳李雪唐文昊薛义松魏明志郭恩言
Owner QILU UNIV OF TECH
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