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Method for preparing metal compound through anode metal electrooxidation and coupling hydrogen production

A metal compound, electro-oxidation technology, applied in the field of electrochemical materials, can solve problems such as waste water discharge, and achieve the effects of reducing costs, promoting oxidation, and reducing separation load

Pending Publication Date: 2021-09-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The theoretical potential difference between the two is the theoretical potential of 1.23V required for full hydrolysis. However, due to factors such as electrochemical polarization and ohmic polarization in the actual process, the cell pressure required for electrolysis of water is often much higher than the theoretical potential.
At present, the "bottom-up" wet solution chemical method is generally used to prepare various metal-based solid compounds. This process usually requires the use of high-purity inorganic precursor salts and the use of organic solvents, etc., resulting in a large amount of wastewater discharge

Method used

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  • Method for preparing metal compound through anode metal electrooxidation and coupling hydrogen production
  • Method for preparing metal compound through anode metal electrooxidation and coupling hydrogen production
  • Method for preparing metal compound through anode metal electrooxidation and coupling hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Using the iron sheet as the working electrode, cut the high-purity iron sheet with a thickness of 0.5mm into 1×1.5cm 2 strips, with about 1×0.5cm reserved at the upper end 2 Connect with the platinum electrode holder, the lower end is 1×1cm 2 contact with electrolyte. The counter electrode and reference electrode use 1×2cm 2 Platinum sheet electrode, the electrolyte is 0.5M sodium chloride solution, and no electrocatalyst is loaded on the electrode. The electrolysis adopts a two-electrode system, so the potential set by the electrochemical workstation is the tank pressure, and the electrolysis process is accompanied by 400r / min magnetic stirring. First, a cyclic voltammetry scan was performed in the 0-1.5V potential interval (10 cycles, 50mV s -1 ) to activate the iron sheet until the curve is relatively stable. followed by 10mV s -1 A linear voltammetric scan was performed at a scan rate of 0-1.5V, and the polarization curve 1 was obtained. It can be seen tha...

Embodiment 2

[0038] (1) Using the iron sheet as the working electrode, cut the high-purity iron sheet with a thickness of 0.5mm into 1×1.5cm2 strips, with about 1×0.5cm reserved at the upper end 2 Connect with the platinum electrode holder, the lower end is 1×1cm 2 contact with electrolyte. The counter electrode and reference electrode use 1×2cm 2 Platinum sheet electrode, the electrolyte is 0.5M sodium chloride solution, and the surfactant CTAB is added to the electrolyte, and its concentration reaches above CMC. No electrocatalyst was loaded on the electrodes, and the electrolysis process was accompanied by 400r / min magnetic stirring. First, a cyclic voltammetry scan was performed in the 0-1.5V potential interval (10 cycles, 50mV s -1 ) to activate the iron sheet until the curve is relatively stable. Electrolysis was then performed at a constant potential of 1.5 V for 1 hour. After the electrolysis was completed, a large amount of brown precipitate was produced in the solution, whic...

Embodiment 3

[0044] (1) Using the iron sheet as the working electrode, cut the high-purity iron sheet with a thickness of 0.5mm into 1×1.5cm 2 strips, with about 1×0.5cm reserved at the upper end 2 Connect with the platinum electrode holder, the lower end is 1×1cm 2 contact with electrolyte. The counter electrode and reference electrode use 1×2cm 2 Platinum electrode, the electrolyte is 0.5M sodium chloride + 0.01M lithium dihydrogen phosphate solution. No electrocatalyst was loaded on the electrodes, and the electrolysis process was accompanied by 400r / min magnetic stirring. First, a cyclic voltammetry scan was performed in the 0-1.0V potential interval (10 cycles, 50mV s -1 ) to activate the iron sheet until the curve is relatively stable. Electrolysis was then performed at a constant potential of 1.0 V for 1 hour. After the electrolysis is completed, a large amount of off-white precipitates are produced in the solution, which are not ferromagnetic. The precipitate was centrifuged...

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Abstract

The invention provides a method for preparing a metal compound through anode metal electrooxidation and coupling hydrogen production. A non-noble metal iron sheet in the center of a metal activity sequence table is adopted as an anode, the non-noble metal iron sheet is oxidized under low voltage, the anode generates a corresponding metal compound micro-nano material, and a cathode is subjected to a hydrogen evolution reaction on a platinum sheet electrode. The theoretical voltage required by hydrogen production can be remarkably reduced, the cost is low, the anode product is the metal compound micro-nano material, and the industrial utilization value is achieved. Meanwhile, the reaction process is stable and efficient, and the problems of high energy consumption, electrocatalyst instability and the like existing in OER and organic matter electrooxidation are solved. The method has wide application prospects in the fields of electrolytic hydrogen production, energy conversion and storage and the like, and meanwhile, the invention provides an electrochemical synthesis method of a novel metal solid compound micro-nano material.

Description

technical field [0001] The invention relates to the field of electrochemical materials, in particular to a method for producing metal solid compound functional nanomaterials by anodic metal electrooxidation and coupling hydrogen production. Background technique [0002] With the development of the times and the improvement of living standards, people's demand for energy is also increasing, and the development of new clean energy is imminent. Hydrogen energy is clean and pollution-free, with high calorific value, and the development of hydrogen energy has become a promising research field. Due to the abundance of seawater reserves on the earth, electrolysis of water has become an important way to produce hydrogen. The water electrolysis reaction includes two half-reactions, namely the oxygen evolution reaction (OER) at the anode and the hydrogen evolution reaction (HER) at the cathode. The theoretical potential difference between the two is the theoretical potential of 1.23V...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/01C25B1/04C25B11/042
CPCC25B1/01C25B1/04C25B11/042Y02E60/36
Inventor 周尧谢世俊李君涛孙世刚
Owner XIAMEN UNIV
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