Method of partial vulcanization to improve oxygen evolution electrode performance of metal hydroxide

A technology of oxygen evolution electrode and hydroxide, which is applied in the direction of chemical instruments and methods, electrodes, chemical/physical processes, etc., can solve the problems of low catalytic activity and poor stability of oxygen evolution electrode, and improve intrinsic activity and stability performance, excellent oxygen evolution catalytic activity and stability

Inactive Publication Date: 2016-10-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of low catalytic activity and poor stability of transition metal compound oxygen evolution electrodes, t

Method used

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  • Method of partial vulcanization to improve oxygen evolution electrode performance of metal hydroxide
  • Method of partial vulcanization to improve oxygen evolution electrode performance of metal hydroxide
  • Method of partial vulcanization to improve oxygen evolution electrode performance of metal hydroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Pretreatment of substrate

[0040] First put the nickel substrate into the lye and ultrasonically vibrate for 15 minutes for chemical degreasing, wherein the lye is a mixed aqueous solution of 45g / L sodium sulfate, 45g / L sodium carbonate and 45g / L sodium chloride, and then put into absolute ethanol Medium ultrasonic treatment for 15 minutes, and finally rinse with deionized water for later use;

[0041] (2) Preparation of nano flower-shaped nickel-cobalt hydroxide electrode

[0042] Using deionized water as a solvent, prepare a mixed salt solution containing nickel nitrate and cobalt nitrate, wherein the molar concentration of nickel nitrate is 0.01 mol / liter, the molar concentration of cobalt nitrate is 0.02 mol / liter, and the molar concentration of urea is 0.05 mol / liter liter, the molar concentration of ammonium fluoride is 0.005 mol / liter; the base of step (1) pretreatment is put into the reactor that contains mixed salt solution, reacts 10 hours at the tempera...

Embodiment 2

[0052] Step (1) is the same as step (1) in Example 1;

[0053] (2) Preparation of nano-flower-like nickel-iron hydroxide electrode

[0054] Using deionized water as a solvent, prepare a mixed salt solution containing nickel nitrate and iron nitrate, wherein the molar concentration of nickel nitrate is 0.1 mol / liter, the molar concentration of ferric nitrate is 0.2 mol / liter, and the molar concentration of urea is 0.1 mol / liter liter, the molar concentration of ammonium fluoride is 0.02 mol / liter; the base of step (1) pretreatment is put into the reactor that contains mixed salt solution, reacts 5 hours at the temperature of 60 ℃; After the reaction finishes, use Rinse it with deionized water and place it in an inert atmosphere at a temperature of 40°C for 24 hours to dry it, then cool it to room temperature and take it out to prepare a nano-flower-shaped nickel-iron hydroxide electrode;

[0055] (3) Preparation of nickel-ironium sulfide oxygen evolution electrode

[0056] Th...

Embodiment 3

[0058] Step (1) is the same as step (1) in Example 1;

[0059] (2) Preparation of nanoflower-like iron-cobalt hydroxide electrode

[0060] Using deionized water as a solvent, prepare a mixed salt solution containing ferric nitrate and cobalt nitrate, wherein the molar concentration of ferric nitrate is 0.05 mol / liter, the molar concentration of cobalt nitrate is 0.02 mol / liter, and the molar concentration of urea is 0.05 mol / liter liter, the molar concentration of ammonium fluoride is 0.01 mol / liter; the base of step (1) pretreatment is put into the reactor that contains mixed salt solution, reacts 5 hours under the temperature of 200 ℃; After the reaction finishes, use Rinse it with deionized water and place it in an inert atmosphere at a temperature of 100°C for 2 hours to dry it, then cool it to room temperature and take it out to prepare a nano flower-shaped iron-cobalt hydroxide electrode;

[0061] (3) Preparation of Hydroxyl Iron Cobalt Sulfide Oxygen Evolution Electrod...

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Abstract

The invention provides a method of partial vulcanization to improve oxygen evolution electrode performance of metal hydroxide and belongs to the field of oxygen evolution catalyzation of electrolysis of water. The method comprises the following steps: firstly, pretreatment is carried out on nickel foam, then, special nano floriform metal hydroxide is formed on the surface of the nickel base after the pretreatment in an in-situ growth manner through the hydrothermal synthesis method, and finally, the prepared metal hydroxide and a sulphur source have hydrothermal reaction to prepare a hydroxyl metal sulfide oxygen evolution electrode. According to the invention, the method is novel, the demanded technology is simple, the production cost is low, requirements to equipment are lower, and industrial production is suitable; in addition, the prepared electrode has excellent oxygen evolution activity and stability, is large in specific surface area, firmly combines with a base, and can be applied to the field of oxygen evolution through industrial electrolysis of water.

Description

technical field [0001] The invention belongs to the field of electrolytic water catalysis for oxygen evolution, in particular to a method for improving the performance of a metal hydroxide oxygen evolution electrode by partial sulfidation. Background technique [0002] As the best clean energy for future human society and economic development, hydrogen energy is considered to be one of the most promising energy sources in the 21st century. Hydrogen evolution by electrolysis of water is one of the most widely used and relatively mature technologies at present. This process is the reverse process of hydrogen and oxygen combustion to generate water. At present, at least 25% of the electrical energy consumed by industrial alkaline electrolyzed water to overcome the overpotential of the electrodes is used. The high overpotential of oxygen evolution at the anode is the key to the high energy consumption of electrolyzed water. Therefore, the development of an efficient and stable ...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B01J27/043B01J27/04
CPCB01J27/04B01J27/043C25B1/04C25B11/095Y02E60/36
Inventor 魏子栋彭立山熊昆廖满生陈四国李莉刘灵惠王晓雪张伶
Owner CHONGQING UNIV
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