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IrRu-based multi-component alloy oxygen evolution catalyst and preparation method thereof

A technology of oxygen precipitation and catalyst, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor stability

Active Publication Date: 2021-04-30
宁波中科科创新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the application provides a kind of IrRu-based multi-alloy oxygen evolution catalyst and preparation method thereof, to solve the problem of poor stability of existing IrRu-based catalysts

Method used

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  • IrRu-based multi-component alloy oxygen evolution catalyst and preparation method thereof
  • IrRu-based multi-component alloy oxygen evolution catalyst and preparation method thereof
  • IrRu-based multi-component alloy oxygen evolution catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0055] 1) Preparation of metal precursor mixed solution: according to the molar ratio of Ir:Ru=6:4, take chloroiridic acid and ruthenium chloride, and then take erbium chloride hexahydrate with 10% total molar weight of iridium and ruthenium and dissolve them in deionized water , stirred until completely dissolved; adding EDTA, a surfactant with a total molar weight of 1% iridium and ruthenium, to the solution dissolved with metal ions, stirring and mixing evenly, and configuring a precursor mixed solution.

[0056] 2) Preparation of alkaline sacrificial carrier solution: take the strong alkali reagent KOH with a molar ratio of 5:1 to the total molar amount of iridium and ruthenium, and then take the sacrificial agent carrier nano-magnesium oxide with the same molar amount as KOH, so that the two are dispersed in the deionized In water, stir vigorously to disperse evenly.

[0057] 3) Precipitation reaction: Add the metal precursor mixed solution drop by drop to the alkaline sa...

Embodiment 2

[0061] 1) Preparation of metal precursor mixed solution: take chloroiridic acid and ruthenium chloride according to the molar ratio of Ir:Ru=6:4, and then respectively take erbium chloride hexahydrate and molar amount of 5% of the total molar amount of iridium and ruthenium Tungsten chloride with an amount of 5% of the total molar amount of iridium and ruthenium is dissolved in deionized water and stirred until completely dissolved; the surfactant EDTA with 1% of the total molar amount of iridium and ruthenium is added to the solution dissolved with metal ions, stirred and mixed evenly, Obtain the precursor mixture.

[0062] 2) preparation of sacrificial carrier solution: take the strong base reagent KOH whose molar ratio is 5:1 with the total molar amount of iridium and ruthenium, and then take the sacrificial agent carrier nano-magnesium oxide with the same molar amount as KOH, and disperse the two in deionized water, Stir vigorously to disperse evenly.

[0063] 3) Precipit...

Embodiment 3

[0067] 1) Preparation of metal precursor mixed solution: take chloroiridic acid and ruthenium chloride according to the molar ratio of Ir:Ru=7:3, and then dissolve erbium chloride hexahydrate with 10% of the total molar weight of iridium and ruthenium in deionized water, Stir until completely dissolved; add surfactant EDTA with a total molar weight of iridium and ruthenium of 1% to the solution in which the metal ions are dissolved, stir and mix evenly, and prepare a precursor mixed solution.

[0068] 2) preparation of sacrificial carrier solution: take the strong base reagent KOH whose molar ratio is 5:1 with the total molar amount of iridium and ruthenium, and then take the sacrificial agent carrier nano-magnesium oxide with the same molar amount as KOH, and disperse the two in deionized water, Stir vigorously to disperse evenly;

[0069] 3) Precipitation reaction: Add the metal precursor solution drop by drop to the mixed solution of strong base reagent and sacrificial agen...

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Abstract

The invention discloses an IrRu-based multi-component alloy oxygen evolution catalyst and a preparation method thereof. The preparation method comprises the steps of dissolving an iridium-containing compound, a ruthenium-containing compound and an X-containing metal compound in deionized water to form a precursor mixed solution; preparing an alkaline sacrificial carrier solution containing a strong alkali reagent; adding the precursor mixed solution into the alkaline sacrificial carrier solution, reacting to form IrRuX hydroxide, and loading the IrRuX hydroxide on the sacrificial carrier; and carrying out heat treatment on the IrRuX hydroxide in a reducing atmosphere to form the IrRuX alloy catalyst supported on a sacrificial carrier. The IrRuX alloy catalyst has high stability and high catalytic activity.

Description

technical field [0001] The present application relates to the technical field of solid electrolyte water electrolysis, in particular to a high-activity and high-stability IrRu-based multi-element alloy oxygen evolution catalyst and a preparation method thereof. Background technique [0002] As the problems of resources, environment and energy on the earth become more and more prominent, the development of renewable and environment-friendly energy is becoming the focus and focus of international research and development. Hydrogen energy has the characteristics of high efficiency, environmental protection, and abundant resources, and is widely used. The development of hydrogen energy is inseparable from the acquisition, storage, transportation and utilization of hydrogen, among which the acquisition of hydrogen is the source of hydrogen energy economy and technological development. Hydrogen production from water electrolysis is considered to be the most promising technology f...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/04B22F9/22
CPCB22F9/22C25B1/04C25B11/04Y02E60/36
Inventor 邹亮亮刘培刘得友杨辉
Owner 宁波中科科创新能源科技有限公司
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