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Oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method

A technology of oxygen evolution reaction and catalyst, which is applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve problems such as not being able to meet high current density, achieve excellent OER performance, high performance, and meet the effect of high current density

Active Publication Date: 2022-02-15
UNIV OF JINAN
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Problems solved by technology

[0005] The purpose of the embodiment of the present application is to provide an oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method, so as to solve the problem that the seawater cracking electrocatalyst in the prior art cannot meet the high current density (≥500mA / cm 2 ) and the technical problem of the demand under low overpotential ≤ 300mV

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  • Oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method
  • Oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method
  • Oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method

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preparation example Construction

[0035] The present application also provides a method for preparing an epoxy reaction catalyst, including the following steps:

[0036] The foam is immersed in a metal precursor ethanol solution, and dried; the metal precursor ethanol solution is an ethanol solution of ferric chloride and nickel chloride;

[0037] Avation is added to the metal precursor ethanol solution, and the dried foam nickel is immersed therein, and the oxygenation reaction catalyst is obtained.

[0038] Specifically, a metal precursor ethanol solution can be configured, iron chloride and nickel chloride are dissolved in ethanol in ethanol. The foamed nickel is then immersed in a metal precursor ethanol solution for a certain time such as 10 to 20 minutes, and the foam can be tiled, and can be dried through room temperature can also be dried or blowing at a relatively low temperature. Do. The dry ethanol volatilization, iron chloride and nickel chloride are attached to the foam nickel.

[0039] After removing...

Embodiment 1

[0063] Preparation oxygen evolution reaction catalyst (amorphous / nanocrystalline and crystalline FeNiCH / NF) of

[0064] With 3.0M hydrochloric acid, 95% ethanol and deionized water three times NF ultrasonic cleaning to remove surface impurities such as nickel oxide. The one NF (20 × 10 × 1.8mm) was immersed in containing 24.4mM FeCl 3 · 6h 2 O + 2.71mM NiCl 2 · 6h 2 O 60mL ethanol solution for 15 minutes, taken out and air dried overnight. Then 0.71g NH 4 HCO 3 Was added to the ethanol solution of the metal precursor, with vigorous stirring. NF above at room temperature for 6 hours immersed in the above solution, so that the surface covered with a layer of iron-nickel hydroxycarbonate (FeNiCH). Amorphous / nanocrystalline obtained FeNiCH / NF soak for 10 to 20 minutes to remove surface impurities, and then dried in air overnight to give the amorphous / nanocrystalline and crystalline FeNiCH / NF in deionized water.

Embodiment 2

[0066] This embodiment provides an electrolysis apparatus, which electrolysis apparatus electrolytic cell comprising an anode, the electrolytic cell of Example 1 of the amorphous / nanocrystalline and crystalline FeNiCH / NF, the electrolytic cell cathode MoNi 4 / NF.

[0067] MoNi 4 / NF exemplary catalysts employed be synthesized as follows.

[0068] MoNi 4 Synthesis / NF catalyst. With 3.0M hydrochloric acid, 95% ethanol and deionized water three times NF ultrasonic cleaning to remove surface impurities such as nickel oxide. 15mL formulation containing Ni (NO 3 ) 2 · 6h 2 O (0.04M) and (NH 4 ) 6 Mo 7 O 24 · 4h 2 O (0.01M) of an aqueous solution, an aqueous solution, and NF (20 × 10 × 1.8mm) was transferred to a capacity of 40mL teflon-lined stainless steel autoclave and sealed under 150 deg.] C for 6 hours, then cooled to at room temperature. After washing with deionized water, the surface of the NF NiMoO 4 cuboid. Finally, the synthesis of NiMoO 4 In the rectangular parallelep...

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Abstract

The embodiment of the present application provides an oxygen evolution reaction catalyst, preparation, application, electrolysis device and seawater cracking method. The oxygen evolution reaction catalyst comprises a foamed nickel substrate and amorphous / nanocrystalline basic iron carbonate supported on the foamed nickel substrate. The amorphous and nanocrystalline mixed structure of basic iron-nickel carbonate (FeNiCH) contains more surface adsorbed oxygen and oxygen vacancies, which may modulate the electronic structure of Fe(III) / Ni(II) and optimize the OER intermediate of adsorption energy. And the surface adsorbed oxygen and deficient oxygen may be related to its resistance to chloride and high corrosion resistance. Therefore, the electrocatalytic OER performance of the above-mentioned oxygen evolution reaction catalyst is less affected by chloride ions, and the electrolytic cell can still maintain its high performance when applied to the electrolytic cell for a long electrolysis time, and its performance in the electrolysis of alkaline offshore seawater Exhibits excellent OER performance and can meet high current density (≥500mA / cm 2 ) and low overpotential ≤ 300mV requirements.

Description

Technical field [0001] The present application relates to the field of seawater cleavage, and more particularly to an epoxy reaction catalyst, preparation, application, electrolysis device, and seawater cleavage method. Background technique [0002] Seawater accounts for 97% of the total world water resources, one of the most abundant natural resources on the earth. Direct lysing seawater production Clean hydrogen fuel is a very promising renewable energy storage technology. Especially for the decomposition of contaminated seawater, while repairing the contaminated seawater, high-purity hydrogen fuel can also become a potential method for solving global energy and environmental problems. However, the main challenge facing seawater cleavage is a variety of dissolved ions from seawater or degradation of cathode and anode electrocatalysts. Chloride ions in seawater may form an active chlorine compound during the reaction, causing a serious corrosion effect on the anode. During elect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/054C25B11/031C25B11/052C25B11/061C25B11/075C25B1/04C25B9/17B82Y30/00B82Y40/00
CPCC25B1/04B82Y30/00B82Y40/00Y02E60/36
Inventor 康青涂青青江萌汪鹏程周伟家周飞艨
Owner UNIV OF JINAN
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