Preparation method of nickel-based thin film water electrolysis electrode
By pretreating the nickel-based material and gas plasma treatment, a nickel-based thin film electrode was prepared, which solved the problems of low catalytic activity and poor conductivity of the nickel-based catalyst in the prior art, and achieved efficient, stable and inexpensive preparation of hydrogen production electrocatalysts.
Patent Information
- Application Number
- CN202510032604.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-05-06
AI Technical Summary
In the prior art, precious metal catalysts are expensive, and non-precious metal catalysts such as nickel-based catalysts have low catalytic activity and poor conductivity, making it difficult to achieve efficient, stable and inexpensive hydrogen production electrocatalysts.
After pretreatment with nickel-based materials, nickel-based film electrodes are prepared by gas plasma treatment, including sand blasting treatment, pickling treatment, alkali washing treatment and other steps to form nickel-based nickel nitride or nickel-based nickel oxide film electrodes.
It effectively reduces the preparation cost of nickel-based thin film electrodes, improves the preparation effect of electrodes, enhances the catalytic activity and conductivity of nickel-based catalysts, and improves the efficiency of the hydrogen evolution process.
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of nickel-based thin film water electrolysis electrode preparation, and in particular relates to a method for preparing a nickel-based thin film water electrolysis electrode. Background Art
[0002] Energy issues are a key factor restricting human development and have become a focus of increasing attention. As an ideal renewable secondary energy source, hydrogen has attracted widespread attention due to its zero carbon emissions during use, wide sources, and many applicable fields. Using renewable energy to generate electricity and then electrolyzing water to produce hydrogen is an effective way to achieve "carbon neutrality and carbon peak." At present, there are three main technical routes for hydrogen production by water electrolysis: alkaline electrolysis (AWE), proton exchange membrane (PEM) electrolysis, and solid oxide (SOEC) electrolysis. Among them, alkaline water electrolysis hydrogen production technology is relatively mature, low-cost, and more economical. It is the main commercial water electrolysis hydrogen production technology.
[0003] The core problem facing the production of hydrogen by alkaline water electrolysis is the development of efficient, stable and cheap electrocatalysts for hydrogen production. So far, the most effective water electrolysis catalyst is the precious metal catalyst, but the raw materials of precious metal catalysts are scarce and expensive, which seriously restricts their large-scale application in practice. Among non-precious metal catalysts, nickel-based catalysts are currently commonly used water electrolysis catalysts, but their catalytic activity is low, conductivity is poor, and the hydrogen evolution process is slow, which needs to be improved through certain means.
[0004] The commonly used methods for preparing nickel-based catalyst electrodes are plasma spraying, electroplating, etc., but these methods have high requirements for catalyst loss or catalyst precursors, and are difficult to achieve in industrial production processes and are costly. Therefore, it is necessary to propose a method for preparing nickel-based thin film electrodes. Summary of the invention
[0005] The present invention overcomes the deficiencies of the prior art and provides a method for preparing a nickel-based thin film water electrolysis electrode to solve the problems existing in the prior art.
[0006] To achieve the above object, the technical solution adopted by the present invention is: a method for preparing a nickel-based thin film water electrolysis electrode, comprising the following steps:
[0007] S1. Pre-treating the nickel-based material;
[0008] S2. The pretreated nickel-based material is subjected to gas plasma treatment to obtain a nickel-based thin film electrode.
[0009] In a preferred embodiment of the present invention, the nickel-based material is nickel mesh or nickel foam.
[0010] In a preferred embodiment of the present invention, the pretreatment includes one or more of sandblasting treatment of the nickel-based material, acid washing treatment of the nickel-based material, and alkaline washing treatment of the nickel-based material.
[0011] In a preferred embodiment of the present invention, in step S2, the plasma gas used is one of nitrogen, oxygen and ammonia.
[0012] In a preferred embodiment of the present invention, the nickel-based thin film electrode obtained in step S2 is a nickel-based nickel nitride thin film electrode or a nickel-based nickel oxide thin film electrode.
[0013] In a preferred embodiment of the present invention, the thickness of the nickel-based thin film electrode is 2-15 um.
[0014] The present invention solves the defects existing in the background technology and has the following beneficial effects:
[0015] The method for preparing the nickel-based thin film water electrolysis electrode of the present invention adopts a plasma penetration method to prepare the nickel-based thin film electrode, which has simple operation and a wide source of raw materials, can effectively reduce costs and improve the preparation effect of the nickel-based thin film electrode. DETAILED DESCRIPTION
[0016] The present invention is further described below in conjunction with specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0017] Embodiment 1
[0018] This embodiment provides a method for preparing a nickel-based thin film water electrolysis electrode, comprising the following steps:
[0019] S1. Pre-treating the nickel-based material;
[0020] S2. The pretreated nickel-based material is subjected to gas plasma treatment to obtain a nickel-based thin film electrode.
[0021] A 46-mesh 0.25 mm wire diameter nickel mesh was first sandblasted, and then the sandblasted nickel mesh was alkaline washed (10% NaOH). The finally cleaned nickel mesh was placed in a plasma processor using oxygen as plasma gas, and finally a nickel-based nickel oxide thin film electrode with a nickel oxide film thickness of 13 microns was obtained. This electrode was used as an electrolytic water oxygen evolution electrode, and its overpotential was 225 mV (vs RHE).
[0022] Embodiment 2
[0023] In this embodiment, the nickel foam is alkaline washed (10% NaOH) and acid washed (0.1M HCl), and the final cleaned nickel foam is placed in a plasma processor using nitrogen as the plasma gas, and finally a nickel-based nickel nitride thin film electrode with a nickel nitride film thickness of 3 microns is obtained. This electrode is used as a water electrolysis hydrogen evolution electrode, and its overpotential is 152mV (vs RHE).
[0024] Embodiment 3
[0025] In this embodiment, a 60-mesh 0.25 mm wire diameter nickel mesh is first sandblasted, and the sandblasted nickel mesh is alkaline washed (10% NaOH). The finally cleaned nickel mesh is placed in a plasma processor using ammonia as a plasma gas, and finally a nickel-based nickel nitride thin film electrode with a nickel nitride film thickness of 6 microns is obtained. This electrode is used as an electrolytic water oxygen evolution electrode, and its overpotential is 175mV (vs RHE).
[0026] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.
Claims
1. A method for preparing a nickel-based thin film water electrolysis electrode, characterized in that: The following steps are included S1. Pre-treating the nickel-based material; S2. The pretreated nickel-based material is subjected to gas plasma treatment to obtain a nickel-based thin film electrode.
2. The method for preparing a nickel-based thin film water electrolysis electrode according to claim 1, characterized in that: The nickel-based material is nickel mesh or nickel foam.
3. The method for preparing a nickel-based thin film water electrolysis electrode according to claim 1, characterized in that: The pretreatment includes one or more of a nickel-based material sandblasting treatment, a nickel-based material pickling treatment, and a nickel-based material alkali washing treatment.
4. The method for preparing a nickel-based thin film water electrolysis electrode according to claim 1, characterized in that: In step S2, the plasma gas used is one of nitrogen, oxygen and ammonia.
5. The method for preparing a nickel-based thin film water electrolysis electrode according to claim 1, characterized in that: The nickel-based thin film electrode obtained in step S2 is a nickel-based nickel nitride thin film electrode or a nickel-based nickel oxide thin film electrode.
6. The method for preparing a nickel-based thin film water electrolysis electrode according to claim 1, characterized in that: The thickness of the nickel-based thin film electrode is 2-15 um.