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Preparation method of titanium-iron-nickel electrocatalyst with high hydrogen evolution activity

A technology of electrocatalysts and electrocatalytic materials, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as waste of energy, poor stability and no use value , to achieve the effects of reducing overpotential, improving electrolysis efficiency, and firm thickness

Active Publication Date: 2019-11-22
JINGGANGSHAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the overpotential is too high, too much energy will be wasted in the process of producing hydrogen by electrocatalysis, and the stability is too poor and has no use value.

Method used

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  • Preparation method of titanium-iron-nickel electrocatalyst with high hydrogen evolution activity
  • Preparation method of titanium-iron-nickel electrocatalyst with high hydrogen evolution activity
  • Preparation method of titanium-iron-nickel electrocatalyst with high hydrogen evolution activity

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preparation example Construction

[0027] The preparation process of the sample of the embodiment of the present invention is as follows figure 1 shown.

[0028] Cleaned and processed carbon fiber paper, in Ni (NO 3 ) 2 , (NH 4 ) 2 Fe(SO 4 ) 2 , NH 4 F, CO (NH 2 ) 2 React in an aqueous solution of 120 °C in a temperature of 120 °C to obtain a CFD loaded with basic iron carbonate nickel salt precursor; place it in a vacuum coating machine, vacuum sublimation to coat a titanium oxide film, and anneal at a temperature of 300 to 500 °C for 2 hours to obtain a composite electrocatalyst product. TiO 2 -NiFe 2 O 4 @CFP-X.

Embodiment 1

[0030] The raw material used is Ni(NO 3 ) 2 , (NH 4 ) 2 Fe(SO 4 ) 2 , NH 4 F, CO (NH 2 ) 2 , weighed in a molar ratio of 3:1:8:20, the weight of the total substance was 1.3 g, mixed and dissolved in 40 ml of water; then take a piece of carbon fiber paper (CFP) and cut it into an area of 2×3cm 2 After ultrasonic cleaning for 15min in acetone, ethanol and water respectively, take out and dry and weigh; then pour the above solution into the inner tank of the 50mL reaction kettle and add a piece of washed 2×3cm 2 CFP, sealed the reaction kettle and kept the temperature at 120 °C for 10 hours, cooled, taken out, washed and dried, and weighed the quality of the precursor loaded on the carbon fiber paper; finally, the sample was annealed in a muffle furnace at 400 degrees in an air atmosphere for 2 hours, after cooling, the TiO of Example 1 was obtained 2 -NiFe 2 O 4 The @CFP-0 composite electrocatalytic material was weighed to measure the loading.

Embodiment 2

[0032] The raw material used is Ni(NO 3 ) 2 , (NH 4 ) 2Fe(SO 4 ) 2 , NH 4 F, CO (NH 2 ) 2 , weighed in a molar ratio of 3:1:8:20, the total mass of the weighed substance was 1.3 g, mixed and dissolved in 40 ml of water; then take a piece with an area of ​​2 × 3 cm 2 The cleaned carbon fiber paper (CFP); then pour the above solution into the liner of the 50mL reaction kettle and add CFP, seal the reaction kettle and keep the temperature at 120 ° C for 10 hours, cool and take out, clean and dry, weigh the load on the carbon fiber The quality of the precursor on the paper; the CFD loaded with the basic iron-nickel carbonate precursor is placed in a vacuum coating machine, the coating time and speed are set, and a titanium oxide film with a thickness of 0.5 nm is plated on the surface of the iron-nickel precursor. The sample was then annealed in a muffle furnace at 400 °C for 2 hours in an air atmosphere, and the TiO of Example 2 was obtained after cooling. 2 -NiFe 2 O ...

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Abstract

The invention relates to a preparation method of a titanium-iron-nickel electrocatalyst with high hydrogen evolution activity, which comprises the following steps: uniformly growing a basic iron-nickel carbonate precursor with a nanosheet double-electric-layer structure on CFP (carbon fiber paper) by a hydrothermal method; plating a titanium oxide film with a certain thickness on the surface of the precursor; carrying out annealing crystallization at 400 DEG C in an air atmosphere to convert amorphous TiO2 into anatase type TiO2 and convert the precursor basic iron-nickel carbonate into nickelferrite; and cooling to obtain the TiO2-NiFe2O4@CFP-X composite electro-catalytic material. The product prepared by the preparation method has the advantages of uniform and firm coating and controllable thickness. The titanium-iron-nickel nanosheet electrocatalyst disclosed by the invention can be used for carrying out electrocatalytic decomposition on water to separate out hydrogen under an alkaline condition and a lower overpotential.

Description

technical field [0001] The invention relates to a preparation method of a titanium-iron-nickel high hydrogen evolution active electrocatalyst, and belongs to the technical field of preparation of a catalyst for electrolysis of water for hydrogen production. Background technique [0002] When solving the energy crisis and environmental pollution problems caused by the existing energy structure dominated by fossil fuels, electrolysis of water to produce hydrogen is one of the most promising means. Water electrolysis includes hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), both of which require electrocatalysts to reduce the corresponding overpotentials. Ideally, water electrolysis should produce hydrogen with low cost and high yield, but the most efficient electrocatalysts for high-efficiency hydrogen production are still dominated by scarce and expensive noble metal-based materials (eg, Pt for HER). Therefore, there is still an urgent need to develop i...

Claims

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Application Information

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IPC IPC(8): B01J23/755C25B1/04C25B11/06
CPCB01J23/755C25B1/04C25B11/04B01J35/33Y02E60/36
Inventor 蔡金华黄俭根钟凡黄智鹏
Owner JINGGANGSHAN COLLEGE
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