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Heterogeneous catalyst, preparation method thereof and application of heterogeneous catalyst in hydrogen evolution by electrolyzing water

A heterogeneous catalyst, catalyst technology, applied in electrolysis components, electrolysis process, nanotechnology for materials and surface science, etc., can solve the problems of low cost performance and high price of precious metal catalysts, achieve performance improvement, excellent electrocatalytic performance, The effect of improving conductivity

Pending Publication Date: 2022-07-15
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the mainstream is noble metal catalysts, such as Pt / C catalysts, but noble metal catalysts are expensive and cost-effective

Method used

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  • Heterogeneous catalyst, preparation method thereof and application of heterogeneous catalyst in hydrogen evolution by electrolyzing water
  • Heterogeneous catalyst, preparation method thereof and application of heterogeneous catalyst in hydrogen evolution by electrolyzing water
  • Heterogeneous catalyst, preparation method thereof and application of heterogeneous catalyst in hydrogen evolution by electrolyzing water

Examples

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Effect test

preparation example 1

[0070] Preparation Example 1 Carrier MXene (Ti 3 C 2 ) preparation

[0071] By etching Ti 3 AlC 2 Powder synthesis of MXene. First, 1 g of LiF was dissolved in 20 ml of HCl (9 mol / L), and then the solution was thoroughly mixed to obtain an etching solution. Next, 1 g of Ti 3 AlC 2 Slowly added to the etching solution and magnetically stirred at 35°C for 24h to obtain a solid. The resulting solid residue was then washed with deionized water and centrifuged at 3500 rpm until pH reached 6. The resulting precipitated product was dispersed in 150 ml of deionized water and then sonicated for 1 h in flowing argon. A few-layer MXene dispersion was obtained by collecting the supernatant after centrifugation at 3500 rpm for 1 hour.

Embodiment 1

[0073] (1) Ni 2 Preparation of precursors of P / MXene:

[0074] Ni was prepared by hydrothermal method 2 Precursor of P / MXene. 0.5816g Ni (NO 3 ) 2 ·6H 2 O (2 mmol), 0.6 g urea (10 mmol) and 0.222 g NH 4 F (6 mmol) was dissolved in 30 mL of deionized water and stirred for 20 min to form a homogeneous solution. Then, the MXene dispersion liquid obtained in Preparation Example 1 was placed in the above solution, and oxygen was excluded with argon gas, and transferred to a stainless steel autoclave together, and placed in an oven at 120° C. for 6 hours. After cooling to room temperature, washing with deionized water, and then drying in an oven at 60 °C for 6 h, the precursor I was obtained. Precursor I and 2.0 g NaH 2 PO 2 Put them on two porcelain boats, respectively placed downstream and upstream of the tube furnace, heated to 300 °C at a rate of 5 °C / min, and kept for 2 h for phosphating treatment. Finally, Ni was obtained after cooling to room temperature 2 P / MXene ...

Embodiment 2

[0078] (1) Ni 2 Preparation of precursors of P / MXene:

[0079] Ni was prepared by hydrothermal method 2 Precursor of P / MXene. 0.5816g Ni (NO 3 ) 2 ·6H 2 O (2 mmol), 0.6 g urea (10 mmol) and 0.222 g NH 4 F (6 mmol) was dissolved in 30 mL of deionized water and stirred for 20 min to form a homogeneous solution. Then, the MXene dispersion liquid obtained in Preparation Example 1 was placed in the above solution, and oxygen was excluded with argon gas, and transferred to a stainless steel autoclave together, and placed in an oven at 120° C. for 6 hours. After cooling to room temperature, washing with deionized water, and then drying in an oven at 60 °C for 6 h, the precursor I was obtained. Precursor I and 2.5 g NaH 2 PO 2 Put them on two porcelain boats, respectively placed downstream and upstream of the tube furnace, heated to 350 °C at a rate of 5 °C / min, and kept for 2 hours for phosphating treatment. Finally, Ni was obtained after cooling to room temperature 2 P / MX...

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Abstract

The invention discloses a heterogeneous catalyst, a preparation method of the heterogeneous catalyst and application of the heterogeneous catalyst in hydrogen evolution by electrolyzing water. The heterogeneous catalyst comprises a carrier and an active component, the carrier is MXene; the active component comprises nickel phosphide and molybdenum diselenide; the active component has a heterostructure; the heterostructure comprises a Ni2P nanosheet and a MoSe2 nanosheet, wherein the Ni2P nanosheet and the MoSe2 nanosheet are formed on an MXene substrate. The Ni2P-coated MoSe2 / MXene composite material disclosed by the invention has a heterostructure and a nanosheet array structure, and the structure has a rich structural network, greatly exposes active sites and shows excellent electro-catalytic performance.

Description

technical field [0001] The application relates to a heterogeneous catalyst, a preparation method thereof, and an application in the electrolysis of water for hydrogen evolution, and belongs to the technical field of catalysts. Background technique [0002] As a strategic reserve energy in the 21st century, hydrogen energy is favored for its zero pollution, recyclability and high energy density. As one of the hydrogen production methods, water electrolysis has broad application prospects due to its abundant raw materials, high product purity, and easy control of reaction conditions. [0003] However, the reaction kinetics of the hydrogen production process from water electrolysis (cathodic hydrogen evolution, anode oxygen evolution) is slow, and efficient catalysts are urgently needed to speed up the reaction rate. Noble metal-based catalysts have high electrocatalytic activity, but are rare and expensive, and have poor stability. Therefore, it is urgent to develop low-cost...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B11/054C25B1/04B82Y40/00B82Y30/00
CPCC25B11/091C25B1/04B82Y40/00B82Y30/00
Inventor 吴志连史建民俞波
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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