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Vanadium-doped three-dimensional mesoporous Co3O4 nano-catalyst as well as preparation method and application thereof

A nano-catalyst and three-dimensional mesoporous technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of oxygen reduction and oxygen evolution reaction catalytic performance to be improved, and achieve excellent dual functions The effect of oxygen catalytic activity, simple reaction conditions, and less synthesis equipment

Active Publication Date: 2021-08-24
成都天芮科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Co 3 o 4 The covalent force between bulk materials and oxygen is strong, but limited by e g The orbital filling number is 0, and its catalytic performance for oxygen reduction and oxygen evolution reactions needs to be improved

Method used

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  • Vanadium-doped three-dimensional mesoporous Co3O4 nano-catalyst as well as preparation method and application thereof
  • Vanadium-doped three-dimensional mesoporous Co3O4 nano-catalyst as well as preparation method and application thereof
  • Vanadium-doped three-dimensional mesoporous Co3O4 nano-catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A vanadium-doped three-dimensional mesoporous Co 3 o 4 Nanorod, its preparation method is as follows:

[0036] (1) Evenly disperse 0.75 mmol of cobalt dichloride hexahydrate and 0.25 mmol of vanadium trichloride in 27 mL of ultrapure water, add 3 mL of glycerin dropwise, transfer to a 50 mL reaction kettle, and react in a blast oven at 200°C for 24 hours.

[0037] (2) After the hydrothermal kettle is naturally cooled to room temperature, the solid product is centrifuged, washed three times with ultrapure water, dried, and calcined at 250°C for 1 hour at a heating rate of 5°C / min in a muffle furnace to obtain vanadium-doped Heterogeneous three-dimensional mesoporous Co 3 o 4 Nano stave.

Embodiment 2

[0039] A vanadium-doped three-dimensional mesoporous Co 3 o 4 Nanorod, its preparation method is as follows:

[0040] (1) Evenly disperse 0.6 mmol of cobalt dichloride hexahydrate and 0.2 mmol of vanadium trichloride in 27 mL of ultrapure water, add dropwise 3 mL of glycerin, transfer to a 50 mL reaction kettle, and react in a blast oven at a constant temperature of 180°C for 24 hours.

[0041] (2) After the hydrothermal kettle is naturally cooled to room temperature, the solid product is centrifuged, washed three times with ultrapure water, dried, and calcined at 300°C for 1 hour at a heating rate of 5°C / min in a muffle furnace to obtain vanadium-doped Heterogeneous three-dimensional mesoporous Co 3 o 4 Nano stave.

Embodiment 3

[0043] A vanadium-doped three-dimensional mesoporous Co 3 o 4 Nanorod, its preparation method is as follows:

[0044] (1) Evenly disperse 0.55 mmol of cobalt dichloride hexahydrate and 0.25 mmol of vanadium trichloride in 27 mL of ultrapure water, add dropwise 3 mL of glycerin, transfer to a 50 mL reaction kettle, and react in a blast oven at 200°C for 24 hours.

[0045] (2) After the hydrothermal kettle is naturally cooled to room temperature, the solid product is centrifuged, washed three times with ultrapure water, dried, and calcined at 280°C for 1 hour at a heating rate of 5°C / min in a muffle furnace to obtain vanadium-doped Heterogeneous three-dimensional mesoporous Co 3 o 4 Nano stave.

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Abstract

The invention discloses a vanadium-doped three-dimensional mesoporous Co3O4 nano catalyst as well as a preparation method and application thereof. The method comprises the following steps: (1) uniformly dispersing cobalt salt and vanadium salt into a glycerol solution according to a molar ratio of 1:(0-1), and reacting at 180-200 DEG C for 20-24 hours to obtain a precursor; and (2) carrying out heat treatment on the precursor at 200-800 DEG C for 1-2 hours to prepare the vanadium-doped three-dimensional mesoporous Co3O4 nanorod. The electron distribution state of Co3O4 is changed by vanadium doping, and the eg orbital electron filling number of Co3+ at an octahedral position point is optimized to be close to 1, so that excellent difunctional oxygen catalytic activity is shown; and the nano-catalyst has a wide application prospect in a plurality of clean energy conversion modes (such as fuel cells and metal-air cells) involving electro-catalytic oxygen reduction or oxygen evolution reaction.

Description

technical field [0001] The invention belongs to the field of energy conversion and storage, in particular to a vanadium-doped three-dimensional mesoporous Co 3 o 4 Nanocatalyst and its preparation method and application. Background technique [0002] With climate change and energy shortages on the rise, research and development of clean energy will be critical in the coming decades. Many advanced technologies for clean energy conversion, such as fuel cells, water electrolysis to hydrogen, metal-air batteries and carbon dioxide conversion, have important basic research and economic development significance. The core of these energy conversion technologies is a series of electrochemical processes, including electrocatalytic oxygen reduction reaction and hydrogen oxidation reaction that occur on the cathode and anode of the hydrogen-oxygen fuel cell, respectively; gaseous molecular hydrogen is generated on the cathode and anode of the electrolysis device, respectively. Hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88C25B11/04C25B1/04B82Y30/00
CPCH01M4/9016H01M4/8882B82Y30/00C25B1/04Y02E60/50
Inventor 康毅进饶袁
Owner 成都天芮科技有限公司
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