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Water electrolysis efficient and double-function catalysis electrode and preparation method thereof

A dual-function catalysis, water electrolysis technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of difficulty in large-scale popularization, limited metal material reserves, general performance, etc., and achieves long service life, low cost, Simple preparation method

Inactive Publication Date: 2018-05-04
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The elements currently used to make electrodes can be divided into the following three categories: 1. Noble metal electrode materials (such as Pt, Ir, Ru, etc.), which are a class of electrode materials with excellent performance, but these metal materials are limited in reserve, expensive, and difficult to obtain. Large-scale promotion and use; 2. Non-precious metal alloy electrodes are mainly composed of transition metals such as iron, cobalt, and nickel. The electrode contains highly active electrocatalytic materials, mainly composed of non-metallic elements such as oxygen, phosphorus, carbon, sulfur and compounds of transition metals. promotional value

Method used

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  • Water electrolysis efficient and double-function catalysis electrode and preparation method thereof
  • Water electrolysis efficient and double-function catalysis electrode and preparation method thereof
  • Water electrolysis efficient and double-function catalysis electrode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, the preparation of Co-B / Ni electrode catalytic material

[0027] (1) Nickel substrate pretreatment

[0028] Place the nickel sheet in an acetone solution for ultrasonic cleaning for 30 minutes to remove the grease on the surface of the substrate, then place it in a nitric acid solution with a molar concentration of 3 mol / L, soak for 15 minutes to remove the oxide on the surface of the nickel substrate, and finally use a deionized Rinse with water, let it dry naturally;

[0029] (2) Configure an electroless plating solution containing Co-B, the ratio of each substance and the experimental conditions are shown in the following table:

[0030]

[0031] The pretreated nickel substrate is immersed in the above solution, and chemically deposited at 30° C. for 15 minutes to 12 hours; catalytic electrode materials with different deposition thicknesses can be obtained, rinsed with deionized water, and dried to obtain an electrode. Electrode photos and SEM imag...

Embodiment 2

[0034] Embodiment 2, the preparation of Co-B-P / Ni electrode catalytic material

[0035] (1) Nickel substrate pretreatment

[0036]Place the nickel sheet in an acetone solution for ultrasonic cleaning for 30 minutes to remove the grease on the surface of the substrate, then place it in a nitric acid solution with a molar concentration of 3mol / L, soak for 5 minutes, remove the oxides on the surface of the nickel substrate, and finally wash it with deionized water Rinse and let it dry naturally;

[0037] (2) Configure an electroless plating solution containing Co-B-P, the ratio of each substance and the experimental conditions are shown in the following table:

[0038]

[0039] The pretreated nickel substrate is immersed in the above solution, and chemically deposited at 30° C. for 15 minutes to 12 hours; catalytic electrode materials with different deposition thicknesses can be obtained, rinsed with deionized water, and dried to obtain an electrode. Electrode photos and SEM...

Embodiment 3

[0042] Embodiment 3, Ni-B / Ti electrode preparation

[0043] (1) Titanium substrate pretreatment

[0044] Place the titanium substrate in an acetone solution for ultrasonic cleaning for 10 minutes to remove the grease on the surface of the substrate, then place it in a nitric acid solution with a molar concentration of 3mol / L, soak for 15 minutes to remove the oxides on the surface of the titanium substrate, and finally use deionized Rinse with water, let it dry naturally;

[0045] (2) Configure the electroless plating solution containing Ni-B, the ratio of each substance and the experimental conditions are shown in the following table:

[0046]

[0047] The pretreated titanium substrate is immersed in the above solution, and chemically deposited at 30° C. for 15 minutes to 12 hours; catalytic electrode materials with different deposition thicknesses can be obtained, rinsed with deionized water, and dried to obtain an electrode. Electrode photo as Figure 7 shown;

[004...

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Abstract

The invention belongs to the technical field of electrochemical catalysis electrodes, and particularly relates to a water electrolysis efficient and double-function catalysis electrode and a preparation method thereof. A chemical plating method is adopted, a pre-treated substrate is soaked into chemical plating liquid, and the catalysis electrode covered with metal boride or metal boron-phosphorous compound is obtained after reaction. The catalysis electrode can also serve as a hydrogen evolution electrode and an oxygen evolution electrode of water electrolysis, and has the characteristics ofbeing low in overpotential, chemically stable, and long in service life. According to the preparation method of the catalysis electrode, the process is simple, reaction conditions are mild, equipmentrequirements are low, and an electro-catalysis function film is compact and firm in combination with the substrate. The method is not only suitable for preparation of the efficient catalysis electrode, but also suitable for upgrading and reconstruction of assembled electrodes, and has industrial practical value in the fields such as water electrolysis and chlorine-alkali chemical industry hydrogenevolution.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalytic electrodes, and in particular relates to an electrode material for producing hydrogen and oxygen by industrial high-efficiency electrolysis of water and a preparation method thereof. Background technique [0002] Water electrolysis technology is a kind of technology widely used in sewage treatment, seawater desalination, electrolysis of chlor-alkali, hydrogen production, electrocatalysis and other fields, and plays an important role in modern industrial production. Among them, the chlor-alkali industry is the country's pillar basic industry; hydrogen production by electrolysis of water is one of the industrial technologies for producing high-purity hydrogen, and has broad application prospects in building a clean hydrogen energy system. [0003] A complete water electrolysis cell is mainly composed of four parts: solution, ion exchange membrane, cathode catalyst layer and anode c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C23C18/16C25B1/04
CPCC23C18/16C25B1/04C25B11/051C25B11/073Y02E60/36
Inventor 郭艳辉郝伟举张瑞琦吴仁兵
Owner FUDAN UNIV
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