Preparation method for transition metal oxide nanoparticle

A technology for nanoparticles and transition metals, applied in the field of preparing transition metal nanoparticles, can solve problems such as unfavorable large-scale production, cumbersome methods, time-consuming, etc., and achieves the effects of strong versatility, simple process, and prevention of particle aggregation.

Inactive Publication Date: 2015-06-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods for preparing transition metal oxides in the literature include hydrothermal method, precipitation-calcination method, sol-gel

Method used

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  • Preparation method for transition metal oxide nanoparticle
  • Preparation method for transition metal oxide nanoparticle
  • Preparation method for transition metal oxide nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.5g of cobalt acetate tetrahydrate to 25ml of water, ultrasonically disperse until uniform, then add 2.5mL of ammonia solution with a mass fraction of 25%, and stir in the air for a certain period of time for 15min. Put the above suspension in an oil bath at 100°C reflux in 3h, the black Co 3 o 4 precipitation.

Embodiment 2

[0028] Add 0.5g of manganese acetate tetrahydrate to 25ml of ethanol, ultrasonically disperse until uniform, then add 2.5mL of ammonia solution with a mass fraction of 25%, put it in the air and stir for a certain period of time for 15min, put the above suspension in an oil bath at 100°C reflux in 3h, the brown-yellow Mn 3 o 4 precipitation.

Embodiment 3

[0030] Add 0.17g manganese acetate tetrahydrate and 0.33g Co salt tetrahydrate acetate to 25ml ethanol, ultrasonically disperse until uniform, then add 2.5mL ammonia solution with a mass fraction of 25%, and stir in the air for a certain period of time for 15min to dissolve the above suspension Reflux in an oil bath at 100°C for 3 hours to obtain CoMn 2 o 4 precipitation.

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Abstract

The invention relates to a preparation method for a transition metal oxide nanoparticle. The preparation steps include: adding one of a soluble cobalt salt, manganese salt, copper salt and nickel salt or a mixture of the two into water or ethanol, and dispersing the materials uniformly, then adding an amino group-containing small molecular alkali or alkaline solvent, placing the mixed solution into an oil bath pan to conduct heating reflux till generation of solid precipitate, when the precipitate no longer increases, performing cooling, and subjecting the solid precipitate to filtering, washing and drying so as to obtain the transition metal oxide nanoparticle. The method provided by the invention has the advantages of simplicity and practicability, and convenient mass production. At the same time, the transition metal nanoparticle prepared by the method has the characteristics of even particle size, and good catalytic activity and stability, and is suitable for use as an oxygen reduction reaction catalyst in fuel cells, metal air batteries and the like.

Description

technical field [0001] The invention relates to a method for preparing transition metal nanoparticles, in particular to an electrode material used in the field of electrochemical energy such as supercapacitors, secondary batteries and fuel cells (metal air fuel cells / alkaline anion exchange membrane fuels) battery) as an electrocatalyst. Background technique [0002] With the depletion of petroleum resources and the need to reduce greenhouse gas emissions, the development of new clean energy technologies has become a research hotspot, and relying on electrochemical energy technology to achieve energy storage and conversion has become the first choice for the next generation of clean energy technology. Supercapacitors, secondary batteries, and fuel cells are the three pillars of electrochemical energy. Electrode materials are the core components of these energy conversion technologies, and their activity and price become the key factors affecting the performance and cost of ...

Claims

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Application Information

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IPC IPC(8): C01B13/14B01J23/75B01J23/34B01J23/889B01J23/72H01M4/90B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 孙公权刘静姜鲁华
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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