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Preparation method of self-supporting bifunctional water electrolysis catalyst

A self-supporting electrode, dual-function technology, applied in the field of catalysis, can solve problems such as energy shortage, achieve the effect of easy control, improve stability, and improve the problem of charge transport

Active Publication Date: 2022-02-08
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the current energy shortage problem, the present invention is based on electrochemical catalysis technology, and proposes a preparation method of a self-supporting dual-function loaded low-platinum nitrogen-sulfur co-doped nickel phosphide electrode, and uses it as a dual-functional catalyst in the electrolysis of water Production of hydrogen energy

Method used

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  • Preparation method of self-supporting bifunctional water electrolysis catalyst
  • Preparation method of self-supporting bifunctional water electrolysis catalyst
  • Preparation method of self-supporting bifunctional water electrolysis catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Adopt the hydrothermal growth method, take clean nickel foam (1.0mm) as the substrate, weigh 0.5g of nickel nitrate hexahydrate, 0.6g of urea and disperse them in 30ml of deionized water, stir to dissolve evenly, and transfer them to the reaction kettle. After packaging the shell, transfer it to a constant temperature oven, keep it at 100°C for 8 hours, and then cool down naturally. The product was taken out from the reaction kettle, rinsed repeatedly with deionized water and ethanol, and dried in a vacuum oven to prepare a nickel hydroxide nanosheet array electrode.

[0029] (2) Adopting the simultaneous phosphating-nitriding-sulfurization method, the cobalt hydroxide nanosheet array obtained in step (1) is placed downstream of the air outlet of the tube furnace, and then 0.05g of sulfur powder and 0.1g of ammonium bicarbonate are weighed respectively, Sodium hypophosphite solid 0.5g, and placed in the upper tuyeres of the tube furnace in turn, then nitrogen gas wa...

Embodiment 2

[0032] (1) Adopt the hydrothermal growth method, take clean nickel foam (1.5mm) as the substrate, weigh 0.6g of nickel nitrate hexahydrate, 0.7g of urea and disperse them in 35ml of deionized water, stir to dissolve evenly, and transfer them to the reaction kettle. After packaging the shell, transfer it to a constant temperature oven, keep it at 90°C for 10 hours, and then cool down naturally. The product was taken out from the reaction kettle, rinsed repeatedly with deionized water and ethanol, and dried in a vacuum oven to prepare a nickel hydroxide nanosheet array electrode.

[0033] (2) Adopting the simultaneous phosphating-nitriding-sulfurization method, the cobalt hydroxide nanosheet array obtained in step (1) is placed downstream of the air outlet of the tube furnace, and then 0.1g of sulfur powder and 0.15g of ammonium bicarbonate are weighed respectively, Sodium hypophosphite solid 1.0g, and placed in the upper tuyere of the tube furnace in turn, followed by argon gas...

Embodiment 3

[0036] (1) Adopt the hydrothermal growth method, take clean nickel foam (1.7mm) as the substrate, weigh 0.8g of nickel nitrate hexahydrate, 0.8g of urea and disperse them in 40ml of deionized water, stir to dissolve evenly, and transfer them to the reaction kettle. After packaging the shell, transfer it to a constant temperature oven, keep it at 110°C for 9 hours, and then cool down naturally. The product was taken out from the reaction kettle, rinsed repeatedly with deionized water and ethanol, and dried in a vacuum oven to prepare a nickel hydroxide nanosheet array electrode.

[0037] (2) Adopting the simultaneous phosphating-nitriding-sulfurization method, the cobalt hydroxide nanosheet array obtained in step (1) is placed downstream of the air outlet of the tube furnace, and then 0.15g of sulfur powder and 0.2g of ammonium bicarbonate are weighed respectively, Sodium hypophosphite solid 1.5g, and placed in the upper tuyere of the tube furnace in turn, then nitrogen gas was...

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Abstract

The invention provides a preparation method of a self-supporting bifunctional water electrolysis catalyst. A synchronous phosphorization-nitridation-vulcanization method is combined with a rapid ultraviolet-assisted growth method to prepare a low-platinum-loaded nitrogen and sulfur co-doped nickel phosphide self-supporting electrode. According to the self-supporting electrode material, an organic binder can be prevented from being used, electron transport between a catalytic active material and a conductive substrate can be improved, and the conductivity and catalytic stability of the electrode are improved. Moreover, due to heteroatom doping and surface platinum particle loading, the relatively poor intrinsic conductivity and catalytic activity of nickel phosphide can be further greatly improved. As a water electrolysis bifunctional catalyst, the catalyst can output a high current under a low voltage, and has profound significance for further realizing the industrialization of energy-saving hydrogen production. In addition, the preparation method has the advantages of being simple in equipment, easy to realize and control, good in process repeatability, stable in product quality and the like, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to the preparation of a self-supporting dual-function loaded low-platinum nitrogen-sulfur co-doped nickel phosphide electrode and its application in electrochemical total splitting of water to produce hydrogen energy. Background technique [0002] Hydrogen energy production is a large and growing industry. At present, the main uses of hydrogen energy are the production of ammonia and the cracking of heavy oil. Since hydrogen is clean and renewable, it also holds great promise as a future energy carrier. However, most hydrogen energy preparation technologies will use fossil fuels, which will eventually produce carbon dioxide and increase greenhouse gas emissions. Electrochemical total water splitting is a promising technology for clean hydrogen production. During this process, an oxidation reaction occurs at the anode to generate oxygen (4OH - +4e - =O 2 +H 2 O), a reduction reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/061C25B11/091C25B1/04
CPCC25B11/031C25B11/061C25B11/091C25B1/04Y02E60/36
Inventor 张波郑金龙吕超杰成伽润瞿金晨
Owner UNIV OF SCI & TECH BEIJING
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