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a fe 1 co 6 -p@cc electrocatalyst and preparation method thereof

A fe1co6-p, electrocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unfavorable electrolysis of water for hydrogen production and oxygen production, high cost, scarce price and other problems, Achieve the effects of excellent electrocatalytic water splitting performance, long service life, and simple and easy preparation method.

Active Publication Date: 2022-02-01
GUANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, IrO 2 / RuO 2 Considered as a state-of-the-art electrocatalyst for oxygen evolution reaction (OER), its promotion, application and market appeal are greatly limited due to its scarcity and high cost
Platinum-based catalysts are recognized as the best hydrogen evolution catalysts, such as the commonly used platinum-carbon mixture Pt / C (hereinafter referred to as Pt / C), but there are also problems of scarcity and high price
The above shortcomings show that these precious metals are not conducive to the popularization and application of hydrogen and oxygen production by electrolysis of water. Therefore, in recent years, it has become a research hotspot to study some non-precious metals that are cheap and environmentally friendly to replace precious metal materials.

Method used

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  • a fe <sub>1</sub> co <sub>6</sub> -p@cc electrocatalyst and preparation method thereof
  • a fe <sub>1</sub> co <sub>6</sub> -p@cc electrocatalyst and preparation method thereof
  • a fe <sub>1</sub> co <sub>6</sub> -p@cc electrocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0027] 3. Example 2: Preparation of Fe-P@CC composite material.

[0028] Step (1) Cut the carbon cloth into 1.5×4 cm 2 size, and then ultrasonically cleaned in 1 mol / L hydrochloric acid solution, deionized water and ethanol for 10 minutes, washed in a cycle three times, and dried naturally for later use.

[0029] Step (2) Prepare ferric nitrate nonahydrate mixed solution: weigh 1.980g ferric nitrate nonahydrate, 0.119g ammonium fluoride and 0.481g urea, dissolve them in 70 mL deionized water and 5 mL ethanol, and ultrasonicate for 3 minutes to form a The mixed solution of ferric nitrate nonahydrate is ready for use.

[0030] Step (3) Hydrothermal reaction: Transfer the prepared ferric nitrate nonahydrate mixed solution to a 90 mL polytetrafluoroethylene-lined stainless steel reactor, then place the treated carbon in the mixed solution, and place the reactor Put it in an oven and heat it to 140°C to react for 10 hours. After the reaction, take out the carbon cloth and rinse i...

Embodiment 3

[0032] 4. Example 3: Preparation of Co-P@CC composite material.

[0033] Step (1) process the carbon cloth: cut the carbon cloth into 1.5×4 cm 2 size, and then ultrasonically cleaned in 1 mol / L hydrochloric acid solution, deionized water and ethanol for 10 minutes, washed in a cycle three times, and dried naturally for later use.

[0034] Step (2) Prepare the mixed solution of cobalt nitrate hexahydrate: weigh 1.426g cobalt nitrate hexahydrate, 0.119g ammonium fluoride and 0.481g urea, dissolve them in 70 mL deionized water and 5 mL ethanol, and ultrasonicate for 3 minutes to form a The mixed solution of cobalt nitrate hexahydrate is ready for use.

[0035] Step (3) Transfer the prepared cobalt nitrate hexahydrate mixed solution to a 90 mL polytetrafluoroethylene-lined stainless steel reactor, then arrange the treated carbon in the mixed solution, and place the reactor in an oven Heat to 140 °C for 10 hours. After the reaction, take out the carbon cloth and wash it three tim...

Embodiment 5

[0042] Sixth, embodiment 5: preparation Fe 1 co 8 -P@CC composites.

[0043] Step (1) process the carbon cloth: cut the carbon cloth into 1.5×4 cm 2 size, and then ultrasonically cleaned in 1 mol / L hydrochloric acid solution, deionized water and ethanol for 10 minutes, washed in a cycle three times, and dried naturally for later use.

[0044] Step (2) Prepare iron-cobalt mixed solution (the total amount of metal salt is 4.9 mmol, the molar ratio of Fe and Co is 1:8): weigh 1.268g cobalt nitrate hexahydrate, 0.220g ferric nitrate nonahydrate, 0.119g fluorine Ammonium chloride and 0.481 g of urea were dissolved in 70 mL of deionized water and 5 mL of ethanol, and ultrasonicated for 3 minutes to form an iron-cobalt mixed solution for later use.

[0045] Step (3) Hydrothermal reaction: Transfer the prepared iron-cobalt mixed solution to a 90 mL polytetrafluoroethylene-lined stainless steel reactor, then arrange the treated carbon in the mixed solution, and place the reactor on ...

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Abstract

The invention relates to the field of electrocatalytic total water splitting, specifically a kind of Fe 1 co 6 ‑P@CC electrocatalyst and its preparation method, comprising a composite material of FeP, CoP and carbon cloth, the composite material is that the mixed FeP and CoP are uniformly arranged in the shape of nanowires and covered on the carbon cloth, the composite material The method includes preparing a precursor of iron-cobalt composite material by hydrothermal reaction and performing phosphating reaction on the precursor of iron-cobalt composite material. The preparation method of the present invention is simple and easy to operate. The carbon cloth is soaked in the iron-cobalt mixed solution for hydrothermal reaction treatment, and then high-temperature phosphating with sodium hypophosphite to obtain Fe 1 co 6 ‑P@CC composite material has excellent electrocatalytic water splitting performance and long service life under a certain current density, showing the application prospect of large-scale industrial production of oxygen and hydrogen.

Description

technical field [0001] The invention belongs to the field of electrocatalytic total water splitting, specifically a kind of Fe 1 co 6 -P@CC electrocatalyst and its preparation method. Background technique [0002] With the improvement of human life and social civilization, the demand for energy supply and ecological environment quality is increasing. At present, how to solve the economic and technological timely challenges and problems related to energy and environment has become an important issue facing the entire human society. Clean and renewable energy conversion and storage systems, including fuel cells, metal-air batteries, and electrochemical water splitting devices, etc., among these systems, electrochemical water splitting devices are the cleanest for producing H 2 and O 2 forward-looking approach. However, efficient catalysts for hydrogen and oxygen evolution are urgently needed for efficient water electrolysis and for large-scale application of hydrogen ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J37/10B01J37/28C25B11/065C25B11/091C25B11/052C25B1/04
CPCB01J27/1853B01J37/10B01J37/28C25B1/04B01J35/23B01J35/33Y02E60/36
Inventor 杨秀林余洪波胡艳
Owner GUANGXI NORMAL UNIV
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