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Molybdenum-based electrocatalyst, preparation method of molybdenum-based electrocatalyst, difunctional electrolytic tank and application of difunctional electrolytic tank

An electrocatalyst and electrolytic cell technology, which is applied in the field of hydrogen production, can solve the problems of unstudied electrolytic cell voltage, complex process and device, and high cost, and achieve the effects of improving hydrogen production efficiency, low cost, and high electrolysis efficiency

Pending Publication Date: 2022-04-12
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing utility model patent: urea electrolysis for wastewater treatment and coal liquefaction hydrogen supply system (publication number CN208183082U) discloses the use of urea electrolysis to obtain high-purity hydrogen, but the process and devices used are complex and costly
Existing invention patent application: An anode catalyst for electrolysis of water and electrolysis of urea and its preparation method (publication number CN110237860A) discloses the research on the performance of electrolysis of water and urea with a catalyst, but the preparation of the catalyst requires the use of polluting raw materials , and did not study whether the electrolytic cell voltage changes

Method used

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  • Molybdenum-based electrocatalyst, preparation method of molybdenum-based electrocatalyst, difunctional electrolytic tank and application of difunctional electrolytic tank
  • Molybdenum-based electrocatalyst, preparation method of molybdenum-based electrocatalyst, difunctional electrolytic tank and application of difunctional electrolytic tank
  • Molybdenum-based electrocatalyst, preparation method of molybdenum-based electrocatalyst, difunctional electrolytic tank and application of difunctional electrolytic tank

Examples

Experimental program
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Effect test

Embodiment 1

[0027] At room temperature, add 1.23g of ammonium molybdate and 0.4g of polyethylene glycol into a beaker filled with 30mL of water, and stir for 30min; then add 5ml of nitric acid with a concentration of 65%-68%, stir for 30min, and transfer to In a polytetrafluoroethylene lining, hydrothermal reaction at a constant temperature of 160°C for 24 hours; after the reaction is complete, naturally cool to room temperature, wash with ethanol and water, centrifuge, and dry, and the product is a molybdenum-based electrocatalyst α -MoO 3 .

[0028] figure 1 Prepared for this example α -MoO 3 The X-ray diffraction (XRD) pattern, as can be seen from the figure, the product prepared in this embodiment is the same as α -MoO 3 The standard card (JCPDS: 89-7112) is consistent, indicating that the prepared product is phase-pure α -MoO 3 electrocatalyst.

[0029] figure 2 Prepared for this example α -MoO 3 Scanning electron microscope (SEM) figure, it can be seen from the figure th...

Embodiment 2

[0031] At room temperature, add 1.2g of ammonium molybdate and 0.4g of polyethylene glycol into a beaker filled with 30mL of water, and stir for 30min; then add 5ml of nitric acid with a concentration of 65%-68%, stir for 30min, and transfer to In a polytetrafluoroethylene lining, hydrothermal reaction at a constant temperature of 160°C for 24 hours; after the reaction is complete, naturally cool to room temperature, wash with ethanol and water, centrifuge, and dry, and the product is a molybdenum-based electrocatalyst α -MoO 3 , its XRD figure and SEM figure are identical with embodiment 1.

Embodiment 3

[0033] At room temperature, add 1.20g of ammonium molybdate and 0.387g of polyethylene glycol into a beaker containing 28mL of water, and stir for 20min; then add 4.9ml of nitric acid with a concentration of 65%-68%, stir for 20min, and transfer Into the polytetrafluoroethylene lining, hydrothermal reaction at a constant temperature of 170 ° C for 22 hours; after the reaction is complete, naturally cool to room temperature, wash with ethanol and water, centrifuge, and dry, the product is molybdenum-based electrocatalyst α -MoO 3 , its XRD figure and SEM figure are identical with embodiment 1.

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Abstract

The invention discloses a molybdenum-based electrocatalyst and a preparation method thereof as well as a bifunctional electrolytic tank and application thereof, and the preparation method of the molybdenum-based electrocatalyst comprises the following steps: adding ammonium molybdate and polyethylene glycol into water, uniformly stirring, then continuously adding concentrated nitric acid, and stirring to obtain a mixed solution; adding the mixed solution into a reaction kettle for hydrothermal reaction, cooling after the reaction is finished, and centrifuging, washing and drying a product to obtain the molybdenum-based electrocatalyst alpha-MoO3. Raw materials adopted for preparing the molybdenum-based electrocatalyst are easy to obtain, the cost is low, the preparation process is easy to operate, the difunctional electrolytic tank takes the prepared molybdenum-based electrocatalyst as a working electrode and takes a mixed solution of potassium hydroxide and urea as an electrolyte to be applied to hydrogen production and urea wastewater degradation, the hydrogen production efficiency is improved, and the production cost is reduced. Meanwhile, urea pollutants are oxidized and degraded, and the method is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a molybdenum-based electrocatalyst and a preparation method thereof, a dual-function electrolytic cell and an application thereof. Background technique [0002] In recent years, the global energy crisis and environmental pollution have seriously endangered the survival of human beings. Therefore, it is very necessary to develop clean and renewable energy. Hydrogen has been widely concerned as a clean energy source. Among many hydrogen production methods, electrocatalytic water splitting is considered to be a widely used hydrogen production method, but this method is also limited by the four-electron half-reaction of water oxidation. Slow kinetics, high overpotentials, and high applied voltages are challenging. The study shows that this limitation can be overcome by replacing the slow water oxidation half-reaction with a more readily oxidizable molecule. ...

Claims

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Application Information

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IPC IPC(8): C25B11/042C25B1/02C01G39/02C02F1/461C02F101/34C02F101/38
Inventor 滕飞阮万生梁淑予袁晨郝唯一马奔卢子霖王丹张家威程港桠王秋恒
Owner NANJING UNIV OF INFORMATION SCI & TECH
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