Preparation method of electro-catalytic material, electro-catalytic material and application of electro-catalytic material

An electrocatalytic material and hydrothermal reaction technology, applied in the field of electrochemistry, can solve the problems of low efficiency and low activity of electrolyzed water, achieve strong activity and improve efficiency

Pending Publication Date: 2020-01-31
SHENZHEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a preparation method for electrocatalytic materials, electrocatalytic materials and their applications, in order t...

Method used

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  • Preparation method of electro-catalytic material, electro-catalytic material and application of electro-catalytic material
  • Preparation method of electro-catalytic material, electro-catalytic material and application of electro-catalytic material
  • Preparation method of electro-catalytic material, electro-catalytic material and application of electro-catalytic material

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preparation example Construction

[0032] The first aspect of the present application provides a method for preparing an electrocatalytic material, the method comprising:

[0033] Step 101, using hydrothermal reaction to prepare nickel-cobalt hydroxide;

[0034] Step 102, annealing nickel-cobalt hydroxide and selenium powder in argon to obtain selenium-doped nickel cobaltate;

[0035] Step 103, annealing the selenium-doped nickel cobaltate and sodium hypophosphite in argon to obtain an electrocatalytic material.

[0036] Specifically, the preparation of nickel-cobalt hydroxide by hydrothermal reaction in step 101 includes:

[0037] Soluble nickel salt, soluble cobalt salt, ammonium fluoride and hexamethylenetetramine are dissolved in the solvent according to the molar ratio of 5:10:20:2 to obtain the first solution, the solvent is ethanol and water volume ratio 1: 1 mixed solution;

[0038] The first solution was heated at 140°C for 8 hours, cooled to room temperature, washed with water, washed with alcohol ...

Embodiment 1

[0052] Embodiment 1: Preparation of nickel cobalt oxide spinel structure

[0053] (1) Put the hydrothermal solution containing ammonium fluoride, nickel ions, cobalt ions and hexamethylenetetramine into the polytetrafluoroethylene liner. The composition of the hydrothermal solution is: 15ml deionized water, 15ml ethanol, 0.1244g nickel acetate hexahydrate, 0.219g cobalt acetate hexahydrate, 0.074g ammonium fluoride and 0.033g hexamethylenetetramine. Then place the polytetrafluoroethylene liner in a stainless steel autoclave and seal it, heat it in an electric blast drying oven at a temperature of 140°C for 8 hours, then cool it to room temperature, wash it with water, wash it with alcohol and dry it;

[0054] (2) Place the nickel-cobalt hydroxide prepared in step (1) separately in a tube furnace, anneal and heat in an argon atmosphere to obtain a nickel cobalt oxide spinel structure; the process parameters are: annealing temperature 400 ° C, heat preservation Time 2h.

[005...

Embodiment 2

[0056] Example 2: Preparation of selenium-doped nickel cobalt oxide structure

[0057] (1) Put the hydrothermal solution containing ammonium fluoride, nickel ions, cobalt ions and hexamethylenetetramine into the polytetrafluoroethylene liner. The composition of the hydrothermal solution is: 15ml deionized water, 15ml ethanol, 0.1244g nickel acetate hexahydrate, 0.219g cobalt acetate hexahydrate, 0.074g ammonium fluoride and 0.033g hexamethylenetetramine. Then place the polytetrafluoroethylene liner in a stainless steel autoclave and seal it, heat it in an electric blast drying oven at a temperature of 140°C for 8 hours, then cool it to room temperature, wash it with water, wash it with alcohol and dry it;

[0058] (2) the nickel-cobalt hydroxide prepared by step (1) and the selenium powder are placed in a tube furnace at a mass ratio of 1:5, the selenium powder is placed on the upstream of the tube furnace atmosphere, and the nickel-cobalt hydroxide is downstream, Annealing a...

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Abstract

The invention relates to a preparation method of an electrocatalytic material, the electrocatalytic material and application of the electrocatalytic material. The preparation method comprises the following steps: preparing nickel-cobalt hydroxide by utilizing a hydrothermal reaction; annealing the nickel-cobalt hydroxide and selenium powder in argon to obtain selenium-doped nickel cobaltate; annealing the selenium-doped nickel cobaltate and sodium hypophosphite in argon to obtain the electro-catalytic material; an amorphous selenium and phosphorus double-doped nickel cobaltate material is prepared by the preparation method; the material has a three-dimensional amorphous structure; the active sites are greatly increased, exposure of the active sites is facilitated, the electrocatalytic material has good activity in HER and OER reactions of electrolyzing water in an alkaline electrolyte, and meanwhile, the electrocatalytic material is used as a cathode catalyst and an anode catalyst to fully decompose water, and only 1.54 V voltage is needed for driving an electrolytic cell to generate 10mA/cm < 2 > current density.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of an electrocatalytic material, an electrocatalytic material and applications thereof. Background technique [0002] Energy crisis and environmental pollution are serious problems facing human survival and development. Therefore, in recent years, seeking new energy sources to solve these problems has attracted increasing attention from researchers in energy development and environmental governance in various countries. The promotion and use of clean energy such as wind energy, solar energy, and hydrogen energy are crucial to future sustainable development and maintaining the balance of the ecological environment. Among them, wind energy and solar energy are not easy to store and transport, and have intermittent characteristics, so hydrogen energy has become the most ideal clean energy at present. [0003] The electrocatalytic water spli...

Claims

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Application Information

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IPC IPC(8): B01J27/185C25B1/04C25B11/06
CPCB01J27/1853B01J35/0033C25B1/04C25B11/069Y02E60/36
Inventor 肖冰心宋军屈军乐
Owner SHENZHEN UNIV
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