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A vanadium-doped three-dimensional mesoporous co 3 o 4 Nano-catalyst and preparation method and application thereof

A nano-catalyst, three-dimensional mesoporous technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve the problems of oxygen reduction and oxygen evolution reaction catalytic performance needs to be improved, and achieve excellent dual function Oxygen catalytic activity, less synthesis equipment, faster mass transport and gas desorption

Active Publication Date: 2022-07-22
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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  • A vanadium-doped three-dimensional mesoporous co <sub>3</sub> o <sub>4</sub> Nano-catalyst and preparation method and application thereof
  • A vanadium-doped three-dimensional mesoporous co <sub>3</sub> o <sub>4</sub> Nano-catalyst and preparation method and application thereof
  • A vanadium-doped three-dimensional mesoporous co <sub>3</sub> o <sub>4</sub> Nano-catalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

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

[0036] (1) Disperse 0.75 mmol of cobalt dichloride hexahydrate and 0.25 mmol of vanadium trichloride in 27 mL of ultrapure water, add dropwise 3 mL of glycerol, 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 was naturally cooled to room temperature, the solid product was centrifuged, washed three times with ultrapure water, dried, and calcined at 250°C for 1 h at a heating rate of 5°C / min in a muffle furnace to obtain vanadium-doped Hetero 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 3 mL of glycerol dropwise, transfer to a 50 mL reaction kettle, and react in a blast oven at 180°C for 24 hours.

[0041] (2) After the hydrothermal kettle was naturally cooled to room temperature, the solid product was centrifuged, washed three times with ultrapure water, dried, and calcined at 300 °C for 1 h at a heating rate of 5 °C / min in a muffle furnace to obtain vanadium doped Hetero 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) Disperse 0.55mmol of cobalt dichloride hexahydrate and 0.25mmol of vanadium trichloride evenly in 27mL of ultrapure water, add 3mL of glycerol dropwise, transfer to a 50mL reaction kettle, and react at 200°C for 24h in a blast oven.

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

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Abstract

The invention discloses a vanadium-doped three-dimensional mesoporous Co 3 O 4 Nano-catalyst and preparation method and application thereof. The method includes the following steps: (1) uniformly dispersing cobalt salt and vanadium salt in a glycerol solution with a molar ratio of 1:0-1, and reacting at 180-200° C. for 20-24 hours to obtain a precursor; (2) Heat-treating the precursor at 200-800 °C for 1-2 h to obtain vanadium-doped three-dimensional mesoporous Co 3 O 4 Nano stave. The present invention utilizes vanadium doping to change Co 3 O 4 The electron distribution state of , optimizes Co at octahedral sites 3+ e g The number of orbital electron filling approaches approaches 1, thus exhibiting excellent bifunctional oxygen catalytic activity, which is useful in a variety of clean energy conversion methods involving electrocatalytic oxygen reduction or oxygen evolution reactions (such as fuel cells, metal-air batteries). Broad application prospects.

Description

technical field [0001] The invention belongs to the field of energy conversion and storage, and in particular relates to a vanadium-doped three-dimensional mesoporous Co 3 O 4 Nano-catalyst and preparation method and application thereof. Background technique [0002] As climate change and energy shortages become increasingly prominent, clean energy research and development will be critical in the coming decades. Many advanced technologies for clean energy conversion, such as fuel cells, electrolysis of water 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 at the cathode and anode of the hydrogen-oxygen fuel cell, respectively; gaseous molecular hydrogen is produced at the cathode and anode of the water electrolysis d...

Claims

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Application Information

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Patent Type & Authority Patents(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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