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Preparation method of iridium ruthenium-based oxygen evolution catalyst

A technology of catalyst and ruthenium oxide, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high iridium content, low iridium loading and high cost of iridium catalyst

Active Publication Date: 2022-03-11
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned problems in the prior art, the embodiment of the present invention provides a method for preparing an iridium-ruthenium-based oxygen evolution catalyst, which is produced by the above-mentioned preparation method A catalyst with low iridium loading, high efficiency and high reliability, which helps to solve the technical problem of high iridium element content in the iridium catalyst in the prior art, resulting in high cost

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  • Preparation method of iridium ruthenium-based oxygen evolution catalyst
  • Preparation method of iridium ruthenium-based oxygen evolution catalyst
  • Preparation method of iridium ruthenium-based oxygen evolution catalyst

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preparation example Construction

[0045] figure 1 It is a schematic flow chart 100 of a preparation method of an iridium-ruthenium-based oxygen evolution catalyst in an embodiment of the present invention. Such as figure 1 As shown, in one embodiment, the application provides a method for preparing an iridium-ruthenium-based oxygen evolution catalyst, the method comprising:

[0046] S101, dissolving the iridium precursor and the ruthenium precursor in a solvent to obtain a mixed solution.

[0047] In this step, a specific step of dissolving the iridium precursor and the ruthenium precursor into a solvent is provided. In this step, the iridium precursor and the ruthenium precursor are completely dissolved in the solvent by stirring with a stirring device to obtain the mixed solution. Wherein, the iridium precursor is one or more of iridium tetrachloride, iridium trichloride, chloroiridic acid, iridium acetate, ammonium chloroiridate, potassium chloroiridate, and sodium chloroiridate. The ruthenium precursor...

Embodiment 1

[0093]According to the molar ratio Ir (iridium): Ru (ruthenium)=3:1 ratio, weigh iridium tetrachloride and ruthenium trichloride, stir and dissolve respectively in isopropanol, obtain the iridium precursor solution and the ruthenium The precursor solution has a metal concentration of 0.2mol / L; the iridium precursor solution is added dropwise to the ruthenium precursor solution at a rate of 2mL / min, and the stirring is continued for 2h to obtain the iridium ruthenium precursor solution. Mixed solution: Ammonium bicarbonate of 50 times the total molar weight of iridium and ruthenium is added to the above-mentioned mixed solution, stirred and reacted for 1h, and then 20 times of the total mass of iridium tetrachloride and ruthenium trichloride is added to the sodium nitrate In the above mixed solution, stir and react for 2 hours; slowly evaporate the above solution to dryness under heating at 80°C and stirring at 600r / min to obtain dry salt of iridium and ruthenium; put the dry sa...

Embodiment 2

[0100] The preparation method and electrochemical test method of the iridium-ruthenium-based oxygen evolution catalyst are the same as the previous method, except that the molar ratio of iridium to ruthenium is Ir:Ru=3:2. Linear scan in 0.5mol / L sulfuric acid at room temperature, 10mA / cm 2 The overpotential is 256mV.

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Abstract

The embodiment of the invention discloses a preparation method of an iridium ruthenium-based oxygen evolution catalyst. The method comprises the following steps: dissolving an iridium precursor and a ruthenium precursor in a solvent to obtain a mixed solution; adding a pore-forming agent and sodium nitrate into the mixed solution, heating, roasting and washing to obtain an iridium ruthenium oxide crude product, pre-leaching the iridium ruthenium oxide crude product by using an acid solution, and washing and drying to obtain the iridium ruthenium-based oxygen evolution catalyst. The catalyst which is low in iridium loading capacity, high in efficiency and high in reliability is prepared through the preparation method, and the technical problem that in the prior art, the iridium catalyst is high in iridium element content, and consequently the cost is too high is solved.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing an iridium-ruthenium-based oxygen evolution catalyst. Background technique [0002] Electrohydrogen, as a universal energy carrier, is considered as a key element of future sustainable energy systems. At present, the hydrogen economy based on large-scale water electrolysis is developing rapidly, that is, hydrogen is obtained through the electrolysis of water. When electricity from renewable sources such as photovoltaics, wind power, hydropower, etc. is used for electrolysis, the resulting green hydrogen may not even emit greenhouse gases. At present, there are three main methods of green hydrogen production technology (that is, water electrolysis technology): proton exchange membrane water electrolysis (PEMWE) and alkaline water electrolysis (AWE) in the low temperature range, and solid oxide electrolysis (SOEC) in the high temperature range. . [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/093C25B1/04
CPCC25B11/093C25B1/04Y02E60/36
Inventor 任航星李黎明宋时莉袁先明焦文强孙岳涛李朋喜王杰鹏杨金彭
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP