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Ruthenium atomic-scale loaded manganese oxide catalyst as well as preparation method and application thereof

A catalyst and atomic-level technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of few types of acidic OER catalysts, low activity, poor stability, etc., to improve intrinsic activity and stability, improve dispersion effect, The effect of optimizing the charge distribution structure

Active Publication Date: 2021-06-25
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a ruthenium atomic-level supported manganese oxide catalyst and its preparation method and application, to solve the problems of existing acidic OER catalysts with few types, low activity and poor stability
The manganese oxide catalyst supported by the atomic level of ruthenium is obtained by the preparation method of the present invention, which can anchor the uniformly dispersed ruthenium element components on the outer surface of the manganese oxide nanowires stable in acidic medium, and effectively improve the dispersion effect of the active sites of the ruthenium metal , optimize the charge distribution structure of the active site, improve the intrinsic activity and stability of the active site, and operate stably for a long period in an acidic electrolyte environment to solve the problem of poor stability of the anode material in an acidic electrolyte environment, with long life

Method used

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  • Ruthenium atomic-scale loaded manganese oxide catalyst as well as preparation method and application thereof
  • Ruthenium atomic-scale loaded manganese oxide catalyst as well as preparation method and application thereof
  • Ruthenium atomic-scale loaded manganese oxide catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0074] 0.02 mol of manganese sulfate, 0.06 mol of potassium sulfate, and complete dissolved were added after 70 mL of an aqueous concentration of 0.28 mol / L. The mixed solution was placed in a hydrothermal kettle, and the water was hot reaction at a temperature of 140 ° C, and the mixture was washed with deionized water, dried at 80 ° C for 12 h to obtain a solid product A.

[0075] A 15 mmol solid product A ultrasound was dispersed in 20 ml of deionized water, and 20 mL of a concentration of 2.41 mol / L was added. 3 After stirring the reaction for 1 h, filtration is completely dried, and a large amount of deionized water is filtered, 12 h is dried at 80 ° C, and the temperature is calcined in the air atmosphere for 1 h, naturally cooled to room temperature. RU / MNO 2 Catalyst sample 1 #.

Embodiment 2

[0077] 0.014 mol of manganese nitrate, 0.043 mol of potassium nitrate was added, and the mixture was completely dissolved in a 50 mL concentration of 0.28 mol / L. The mixed solution was placed in a hydrothermal kettle, and the water was hot reaction at a temperature of 140 ° C, and the mixture was washed with deionized water, dried at 80 ° C for 12 h to obtain a solid product A.

[0078] A 15 mmol solid product A ultrasound was dispersed in 20 ml of deionized water, and 20 mL of a concentration of 4.82 mol / L was added at one time. 3 After 1 h, the reaction was stirred for 1 h, and the filtration was filtered to the solid precipitate, washed with a large amount of deionized water, dried at 80 ° C for 8 h, and calcined in the air atmosphere at 200 ° C for 1 h, naturally cooled to room temperature RU / MNO 2 Catalyst sample 2 #.

Embodiment 3

[0080] 0.028 mol of manganese nitrate, 0.086 mol of potassium nitrate was added, and the mixture was completely dissolved in an aqueous ammonium ammonium sulfate solution of 0.28 mol / L. The mixed solution was placed in a hydrothermal kettle, and the water was hot reaction at a temperature of 140 ° C, and the mixture was washed with deionized water, dried at 80 ° C for 12 h to obtain a solid product A.

[0081] 15 mmol solid product A ultrasound was dispersed in 20 ml deionized water, and 20 ml of concentration of 9.64 mol / L was added. 3 After 1 h, the aqueous solution was stirred for 1 h, and the solid precipitate was filtered to be completely dried, and the mixture was washed with a large amount of deionized water, dried at 70 ° C for 12 h, and calcined in the air atmosphere in the air atmosphere for 1 h, naturally cooled to room temperature RU / MNO 2 Catalyst sample 3 #.

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Abstract

The invention provides a ruthenium atom-scale loaded manganese oxide catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) carrying out hydrothermal reaction on a mixed solution, filtering, washing and drying to obtain a solid product; wherein the mixed solution comprises manganese salt, an oxidizing agent, a pore filling agent and water; and 2) reacting the solid product and ruthenium salt in solvent water, filtering, washing, drying, roasting and cooling to obtain the catalyst. According to the ruthenium atomic-scale loaded manganese oxide catalyst obtained by the preparation method, the ruthenium element component uniformly dispersed in an atomic scale is anchored on the outer surface of the manganese oxide nanowire with a stable acid medium, so that the dispersion effect of ruthenium metal active sites is effectively improved, the charge distribution structure of the active sites is optimized, and the intrinsic activity and stability of the active sites are improved; and as an anode material of an electrolytic tank for hydrogen production by electrolysis of water under the acidic electrolyte condition, the anode material is applied to the electrolytic tank for hydrogen production by electrolysis of water under the acidic condition, and has excellent acidic oxygen evolution reaction catalytic activity and stability.

Description

Technical field [0001] The present invention belongs to the technical field of nanomaterials and energy techniques, and the manganese oxide catalyst according to a ruthenium atom-level load and a preparation method thereof, and thereof is related to an acid-stable epoxide reaction catalytic material, i.e., an electrolytic water, anodic anodic material. Its preparation method and application in electrolytic water hydrogen production areas. Background technique [0002] Wind energy, tidal energy, and solar energy, such as renewable energy generation in recent years, gradually become the most cheap power generation technology. Transforming renewable energy into "fuel" is an important renewable energy strategy for cope with fossil fuel depletion and climate change. It is one of the most feasible technologies that are currently possible to store and utilize the most feasible energy storage and utilization of large-scale renewable energy storage and utilization. In many electrolyte wat...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/093
CPCC25B1/04Y02E60/36Y02P20/133
Inventor 李小鹏林超
Owner DONGHUA UNIV
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