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One-dimensional porous nanocomposite and preparation method thereof and application in water electrolysis

A nano-composite material and porous graphite technology, applied in the field of composite catalysts, can solve the problems of complex preparation method, high temperature energy consumption, low crystallinity and purity, etc., and achieve the effects of easy availability of raw materials, cheap raw materials and simple preparation method.

Active Publication Date: 2018-10-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the reported metal carbide / carbon nanocomposites use the mixture as the precursor, the preparation method is complex, high temperature and energy consumption, need to use expensive reagents (organic reagents, templates, reducing agents, etc.), it is difficult to control the particle size of the product And dispersibility, crystallinity and purity are low, etc., catalytic activity and stability still need to be improved

Method used

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  • One-dimensional porous nanocomposite and preparation method thereof and application in water electrolysis
  • One-dimensional porous nanocomposite and preparation method thereof and application in water electrolysis
  • One-dimensional porous nanocomposite and preparation method thereof and application in water electrolysis

Examples

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Embodiment 1

[0036] (1) Weigh 8.724g nickel nitrate hexahydrate, 2.974g zinc nitrate hexahydrate and 12.809g sodium salicylate, dissolve them in 200mL deionized water at room temperature to form a salt solution, pour the prepared salt solution into four In the flask, and start stirring with an electric stirrer at a constant speed to mix the salt solution evenly.

[0037] (2) Weigh 4g of sodium hydroxide and dissolve it in 200mL of deionized water to prepare lye, then slowly add lye to the mixed salt solution to adjust the pH of the solution to 6.9, raise the temperature to 95°C, and react at this temperature 24 hours. After the reaction, the product was taken out, centrifuged, washed four times with deionized water, and then dried in an oven at 55°C for 6 hours to obtain a one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor body.

[0038] (3) The one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor obtained in step 2) was roasted for...

Embodiment 2

[0051] (1) Weigh 8.724g nickel nitrate hexahydrate, 2.974g zinc nitrate hexahydrate and 12.809g sodium salicylate, dissolve them in 200mL deionized water at room temperature to form a salt solution, pour the prepared salt solution into four In the flask, and start stirring with an electric stirrer at a constant speed to mix the salt solution evenly.

[0052] (2) Weigh 4g of sodium hydroxide and dissolve it in 200mL of deionized water to prepare lye, then slowly add lye to the mixed salt solution to adjust the pH of the solution to 6.9, raise the temperature to 95°C, and react at this temperature 24 hours. After the reaction, the product was taken out, centrifuged, washed four times with deionized water, and then dried in an oven at 55°C for 6 hours to obtain a one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor body.

[0053] (3) The one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor obtained in step 2) was roasted at ...

Embodiment 3

[0055] (1) Weigh 8.724g nickel nitrate hexahydrate, 2.974g zinc nitrate hexahydrate and 12.809g sodium salicylate, dissolve them in 200mL deionized water at room temperature to form a salt solution, pour the prepared salt solution into four In the flask, and start stirring with an electric stirrer at a constant speed to mix the salt solution evenly.

[0056] (2) Weigh 4g of sodium hydroxide and dissolve it in 200mL of deionized water to prepare lye, then slowly add lye to the mixed salt solution to adjust the pH of the solution to 6.9, raise the temperature to 95°C, and react at this temperature 24 hours. After the reaction, the product was taken out, centrifuged, washed four times with deionized water, and then dried in an oven at 55°C for 6 hours to obtain a one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor body.

[0057] (3) The one-dimensional salicylate-intercalated layered nickel-zinc hydroxide precursor obtained in step 2) was roasted for...

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Abstract

The invention provides a Ni3ZnC0.7@C one-dimensional porous nanocomposite and a preparation method thereof and application in water electrolysis. The one-dimensional novel zinc-nickel carbide / graphitecarbon porous nanocomposite (Ni3ZnC0.7@C) is obtained through simple one-step solid-state pyrolysis in an inert atmosphere by taking organic molecule-intercalated layered nickel-zinc hydroxides as single precursors. The Ni3ZnC0.7@C porous nanorods have the structural characteristics of the uniform morphology, the uniform particle size, the high dispersion, the high crystallization degree, the large specific surface area, the high interfacial interaction and the like. When the prepared Ni3ZnC0.7@C porous nanorods are applied to catalytic water electrolysis hydrogen production, the Ni3ZnC0.7@Cporous nanorods show the high catalytic activity, the overpotential can be as low as 151 mV(i=10 mA / cm<2>), and meanwhile the Ni3ZnC0.7@C porous nanorods have the excellent stability (the testing performance keeps 98% or above in 10 h) and the high corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of composite catalysts, in particular, relates to a Ni 3 ZnC 0.7 @C One-dimensional porous nanocomposite materials and their preparation methods and applications in electrolyzed water. Background technique [0002] In recent years, the excessive exploitation and use of fossil energy has brought serious environmental pollution and is becoming increasingly exhausted as a non-renewable resource. It is imminent to find a renewable new energy to replace traditional fossil energy. Hydrogen, as a clean and renewable new energy, has excellent properties such as high energy density and zero carbon emission, which has attracted widespread attention. Hydrogen production by electrolysis of water is an important way to produce hydrogen energy, and the search for an efficient electrocatalyst has become the focus of research. At present, the catalysts with the highest electrocatalytic activity are noble metals such as p...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/073Y02E60/36
Inventor 王连英高文齐
Owner BEIJING UNIV OF CHEM TECH
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