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Preparation method of superfine nano-porous ferronickel oxide electrocatalyst

A technology of oxide electricity and ultra-fine nanometers, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of large oxide particles and complex technical processes, etc. problems, to achieve the effect of improved electrocatalytic performance, simple preparation process, and high-efficiency electrocatalytic oxygen production performance

Inactive Publication Date: 2018-12-14
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above technical process for preparing powdery crystalline nickel-iron oxides is more complicated, and the prepared oxide particles are larger

Method used

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  • Preparation method of superfine nano-porous ferronickel oxide electrocatalyst
  • Preparation method of superfine nano-porous ferronickel oxide electrocatalyst
  • Preparation method of superfine nano-porous ferronickel oxide electrocatalyst

Examples

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Effect test

Embodiment 1

[0025] A method for preparing an ultrafine nanoporous nickel-iron oxide electrocatalyst, comprising the following steps:

[0026] S1), weigh 3g of polyvinylpyrrolidone and add it to 40mL of 0.1mol / L dilute hydrochloric acid, stir until dissolved;

[0027] S2), take by weighing 0.033g nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O) and 0.102g of potassium ferrocyanide are added to the mixed solution of step S1), fully stirred evenly;

[0028] S3), put the mixed solution prepared in step S2) into an oven, and keep it warm for 20 hours at a temperature of 80°C;

[0029] S4), the solution in the oven is taken out, centrifuged, washed with water and ethanol for 3 times respectively, the obtained precipitate is put into an oven for drying, and the temperature is set at 80° C., and dried for 24 hours to obtain a nickel-iron ratio of 0.5 Prussian blue (NiFe 2 -PB);

[0030] S5), the class Prussian blue (NiFe 2 -PB) into the muffle furnace, the temperature is set to 500 ° C,...

Embodiment 2

[0033] A method for preparing an ultrafine nanoporous nickel-iron oxide electrocatalyst, comprising the following steps:

[0034] S1), weigh 3g of polyvinylpyrrolidone and add it to 40mL of 0.1mol / L dilute hydrochloric acid, stir until dissolved;

[0035] S2), take by weighing 0.050g nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O) and 0.076g potassium ferrocyanide are added to the mixed solution of step S1), fully stirred evenly;

[0036] S3), put the mixed solution prepared in step S2) into an oven, and keep it warm for 20 hours at a temperature of 80°C;

[0037] S4), the solution in the oven is taken out, centrifuged, washed with water and ethanol for 3 times respectively, the obtained precipitate is put into an oven for drying, and the temperature is set at 80° C., and dried for 24 hours to obtain a nickel-iron ratio of 1.0-like Prussian blue NiFe-PB);

[0038] S5), put the Prussian blue-like NiFe-PB) prepared in step S4) into a muffle furnace, set the temperature ...

Embodiment 3

[0041] A method for preparing an ultrafine nanoporous nickel-iron oxide electrocatalyst, comprising the following steps:

[0042] S1), weigh 3g of polyvinylpyrrolidone and add it to 40mL of 0.1mol / L dilute hydrochloric acid, stir until dissolved;

[0043] S2), take by weighing 0.066g nickel acetate tetrahydrate (Ni(CH 3 COO) 2 4H 2 O) and 0.051g of potassium ferrocyanide are added to the mixed solution of step S1), fully stirred evenly;

[0044] S3), put the mixed solution prepared in step S2) into an oven, and keep it warm for 20 hours at a temperature of 80°C;

[0045] S4), the solution in the oven is taken out, centrifuged, washed with water and ethanol for 3 times respectively, the obtained precipitate is put into an oven for drying, and the temperature is set at 80° C., and dried for 24 hours to obtain a nickel-iron ratio of 2.0-like Prussian blue (Ni 2 Fe-PB);

[0046] S5), the class Prussian blue ((Ni 2 Fe-PB) was put into a muffle furnace, the temperature was se...

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Abstract

The invention provides a preparation method of a superfine nano-porous ferronickel oxide electrocatalyst. Ferronickel Prussian blue is synthesized with ion exchange and solvothermal methods and then subjected to low-temperature pyrolysis to be synthesized into ferronickel oxide with different ferronickel proportions and components. The ferronickel Prussian blue in different ferronickel proportionsis obtained through ion exchange and subjected to low-temperature pyrolysis in the air, the ferronickel oxide with superfine nanoparticles is obtained, the particle size of the ferronickel oxide is 20 nm, ferronickel distribution in the oxide is uniform, and besides, the ferronickel oxide has multiple components. The ferronickel proportion of a precursor is adjusted, superfine oxide crystal grains and multiple components contribute to obtaining of efficient electrocatalytic oxygen production performance, the preparation process is simple, and the equipment requirement is low.

Description

technical field [0001] The invention relates to the technical field of electrocatalysts, in particular to a method for preparing an ultrafine nanoporous nickel-iron oxide electrocatalyst. Background technique [0002] To promote sustainable economic development, efficient and clean energy conversion and storage are crucial. Among them, electrocatalytic hydrogen and oxygen production is an effective energy conversion method. In the process of electrocatalytic water splitting, the hydrogen production reaction occurs at the cathode. This process mechanism is simple, the overpotential is low, and it is easy to occur; while the oxygen production reaction process at the anode has a complicated mechanism, which involves the transfer of four electrons and requires a higher Activation energy, resulting in high overpotential, slow reaction, hindering the water splitting process. Therefore, the development of efficient oxygen-producing electrocatalysts to improve the efficiency of wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/02C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J23/002B01J23/755B01J35/33B01J35/40Y02E60/36
Inventor 梁萍谢卓鸿张弛张忠华
Owner WUYI UNIV
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