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Preparation method, product and application of a self-supporting metal-doped iron nitride electrode

A metal-doped, self-supporting technology, applied in the field of electrochemistry, can solve the problems of complex electrode preparation process, high equipment requirements, poor safety performance, etc., and achieve the effect of simple and easy process, high selectivity and low cost.

Active Publication Date: 2021-09-28
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are still few studies on metal doping of iron nitride. The commonly used metal doping methods use solvent method or hydrothermal method (CN201610827571.1, CN201510161755.4, CN201510565389.9), and react at 100-240 °C for 2 ~72 hours, need cleaning, drying and other steps, high equipment requirements, cumbersome process, time-consuming
In summary, the existing production process of iron nitride and metal-doped iron nitride has problems such as high energy consumption, cumbersome process, poor safety performance, and complicated electrode preparation process.

Method used

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  • Preparation method, product and application of a self-supporting metal-doped iron nitride electrode
  • Preparation method, product and application of a self-supporting metal-doped iron nitride electrode
  • Preparation method, product and application of a self-supporting metal-doped iron nitride electrode

Examples

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Effect test

Embodiment 1

[0038] Example 1 Preparation of self-supporting nickel-doped iron nitride electrode

[0039] (1) Preparation of self-supporting porous iron oxide: the iron foil with an area of ​​19.6 square millimeters was ultrasonically cleaned with acetone and ethanol respectively to remove organic matter on the surface, and then dried with nitrogen, and the dried iron foil was used as an anode, and another A platinum sheet with an area of ​​19.6 square millimeters is used as the cathode, and a platinum sheet containing 0.1mol / L NH 4 F and 1mol / L H 2 The ethylene glycol solution of O is used as the electrolyte, and the iron foil is oxidized for 40 minutes by using a 40V DC constant voltage. After the oxidized iron foil is cleaned, it is dried with nitrogen to obtain a porous iron oxide with iron as the conductive substrate, such as figure 1 Shown is the scanning electron micrograph (SEM) figure of the porous iron oxide, and it can be seen that the iron oxide generated on the surface of the...

Embodiment 2

[0042] Example 2 Preparation of self-supporting cobalt-nickel-doped iron nitride electrode

[0043] (1) Preparation of self-supporting porous iron oxide: the iron foil with an area of ​​19.6 square millimeters was ultrasonically cleaned with acetone and ethanol respectively to remove organic matter on the surface, and then dried with nitrogen, and the dried iron foil was used as an anode, and another A platinum sheet with an area of ​​39.2 square millimeters is used as the cathode, and a platinum sheet containing 0.1mol / L NH 4 F and 1mol / L H 2 The ethylene glycol solution of O is used as the electrolyte, and the iron foil is oxidized for 120 minutes by 20V DC constant voltage, and the oxidized iron foil is cleaned and dried with nitrogen to obtain porous iron oxide with iron as the conductive substrate;

[0044] (2) Electrodeposition of cobalt-nickel metal: the porous iron oxide prepared in step (1) is used as the cathode, and the platinum sheet is used as the anode, containi...

Embodiment 3

[0049] Example 3 Preparation of self-supporting cobalt-doped iron nitride electrode

[0050] (1) Preparation of self-supporting porous iron oxide: the iron foil with an area of ​​7 square millimeters was ultrasonically cleaned with acetone and ethanol respectively to remove organic matter on the surface, and then dried with nitrogen, and the dried iron foil was used as an anode, and another A platinum sheet with an area of ​​21 square millimeters is used as the cathode, and a platinum sheet containing 0.1mol / L NH 4 F and 1mol / L H 2 The ethylene glycol solution of O was used as the electrolyte, and the iron foil was oxidized for 10 minutes by 65V DC constant voltage, and the oxidized iron foil was cleaned and dried with nitrogen to obtain porous iron oxide with iron as the conductive substrate;

[0051] (2) Electrodeposition of cobalt metal: the porous iron oxide prepared in step (1) is used as the cathode, and the platinum sheet is used as the anode, and electrodeposition is ...

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Abstract

The invention relates to a preparation method, product and application of a self-supporting metal-doped iron nitride electrode. The purpose is to solve the technical problems of high equipment requirements, cumbersome preparation and strict reaction conditions existing in the preparation process of the existing electrodes. The technical scheme of the present invention is: first, iron foil is used as the anode, and the platinum sheet is used as the cathode, containing 0.1mol / L NH 4 F and 1mol / L H 2 The ethylene glycol solution of O is used as the electrolyte, and the iron foil is oxidized for 10 to 120 minutes at a constant voltage of 20 to 65V DC to form porous iron oxide with iron as the conductive substrate; Deposition, metal doping into porous iron oxide. The metal-doped iron oxide is placed in ammonia gas for nitriding reaction at 400-700° C. for 30-120 minutes to prepare a self-supporting metal-doped iron nitride film electrode. The invention has simple preparation process, low cost, stable electrode structure, can be directly applied to electrocatalytic oxygen evolution reaction, and has the advantages of high catalytic performance, high cycle stability and the like.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a preparation method, product and application of a self-supporting metal-doped iron nitride electrode. Background technique [0002] Global warming and environmental crisis are intensifying, non-renewable energy consumption is increasing, and fossil fuel reserves are rapidly declining. In the future, human beings urgently need to use clean and sustainable energy, such as solar energy, wind energy, water energy and nuclear energy, as well as the electricity generated by them. Therefore, it is imminent to solve the problem of conversion and storage of new energy. Water electrolysis is considered to be a technology that can directly and efficiently produce clean energy hydrogen, which has attracted widespread attention. The water electrolysis process includes cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER). The OER process involves ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/12C25D3/56C23C8/26C25B1/04C25B11/091
CPCC23C8/26C25B1/04C25D3/12C25D3/562C25B11/057C25B11/091Y02E60/36
Inventor 范修军董静刘静张献明
Owner SHANXI UNIV