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Method for preparing amorphous oxyhydroxide catalyst by mechanical stirring method and research on high-efficiency hydrogen production by electrolyzing water by using amorphous oxyhydroxide catalyst

A mechanical stirring and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, electrolysis components, etc., to achieve the effects of low energy consumption, high specific surface area, and improved oxygen production performance

Active Publication Date: 2022-02-25
HUNAN NORMAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

In this patent, we designed a high-efficiency and cheap electrolytic water oxygen evolution catalyst produced by simple room temperature mechanical stirring technology to meet commercial catalyst efficiency, catalyst cost, and environmental protection. Large-scale production, solving the efficiency and macro-preparation problems of oxygen evolution catalysts

Method used

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  • Method for preparing amorphous oxyhydroxide catalyst by mechanical stirring method and research on high-efficiency hydrogen production by electrolyzing water by using amorphous oxyhydroxide catalyst
  • Method for preparing amorphous oxyhydroxide catalyst by mechanical stirring method and research on high-efficiency hydrogen production by electrolyzing water by using amorphous oxyhydroxide catalyst
  • Method for preparing amorphous oxyhydroxide catalyst by mechanical stirring method and research on high-efficiency hydrogen production by electrolyzing water by using amorphous oxyhydroxide catalyst

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Embodiment 1

[0025] Embodiment 1 Amorphous cobalt-iron-based oxyhydroxide Co 1-x Fe x The preparation of OOH catalyst and its electrocatalytic oxygen evolution performance in 1 M KOH environment are as follows:

[0026] Step 1: Cut the cobalt foam base, the cutting area is 12 mm long * 5 mm wide.

[0027] Step 2: Prepare an amorphous oxide mixture mesoporous film, the method is as follows: 0.3 g FeCl 3 ·6H 2 O was fully dissolved in a round-bottomed flask containing 50 ml of ethanol, and ultrasonically mixed at room temperature for about 10 minutes, and then 0.2 g of NH 4 HCO 3 Added to the alcohol solution, the FeCl 3 Alcoholic solution-treated cobalt foam is immersed in the precursor solution.

[0028] Step 3: Place the round bottom flask in the overhead stirrer, adjust the relevant rotation number and stirring time. After stirring, the sample was taken out and soaked in deionized water for 15 minutes to remove the solution adsorbed on the surface. Then, the samples were left to ...

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Abstract

The invention discloses an amorphous oxyhydroxide catalyst prepared by a mechanical stirring method and an efficient water electrolysis hydrogen production research of the amorphous oxyhydroxide catalyst, and belongs to the technical field of hydrogen production of electro-catalytic materials. According to the technical scheme, the method is characterized in that a precursor solution formed by mixing FeCl3. 6H2O, ethyl alcohol and NH4HCO3 is adopted for conducting mechanical stirring and doping on foam metal substrates such as commercial foam nickel and cobalt, chemical reduction and double decomposition reactions on the surfaces of the foam metal substrates are effectively controlled, and the nickel-iron or cobalt-iron-based oxide mesoporous film grows in situ. On the basis, low-cost preparation of the high-performance oxygen evolution catalyst is realized by virtue of a high-potential anodic oxidation method. The product shows excellent electrocatalytic oxygen evolution activity in an alkaline medium, the overpotential is reduced to about 310 millivolts at the large current density of 500 mA / cm<2>, and the composite material is durable and stable in performance, suitable for macro preparation, hopeful to be applied to the industrial alkaline electrolytic cell hydrogen production technology and capable of assisting rapid development of hydrogen energy economy in China.

Description

technical field [0001] The invention relates to electrocatalytic materials and their application in the research field of hydrogen energy preparation, in particular to an amorphous FeOOH / M(OH) based on in-situ growth on the surface of foamed metal substrates such as commercial foamed nickel, cobalt or nickel-cobalt 2 A preparation method of a mesoporous thin film oxygen evolution catalyst and its application to an alkaline electrocatalytic oxygen evolution reaction, wherein M refers to non-precious metals such as cobalt, nickel, copper and other monometals or bimetals. Background technique [0002] With the increasing problems of global energy shortage and environmental pollution, people are gradually turning their attention to renewable and clean energy sources that can replace traditional energy sources, such as wind energy, water energy, solar energy, tidal energy, geothermal energy, etc. These forms of clean energy have been developed and applied rapidly. Considering th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C25B1/04C25B11/054C25B11/061C25B11/091
CPCB01J23/75C25B1/04B01J35/33Y02E60/36
Inventor 曾劲松廖礼玲赵洋周海青
Owner HUNAN NORMAL UNIVERSITY
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