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Preparation method and application of rare earth cerium doped nickel sulfide/iron sulfide heterojunction material

A technology of nickel sulfide and iron sulfide, applied in the field of electrocatalysis, to achieve the effects of improving oxygen mobility, improving mass transfer efficiency, and high catalytic activity

Pending Publication Date: 2022-05-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In comparison, the application of rare earth elements in electrocatalysis is rarely reported, and the effect of introducing rare earth elements on OER performance needs further study

Method used

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  • Preparation method and application of rare earth cerium doped nickel sulfide/iron sulfide heterojunction material
  • Preparation method and application of rare earth cerium doped nickel sulfide/iron sulfide heterojunction material
  • Preparation method and application of rare earth cerium doped nickel sulfide/iron sulfide heterojunction material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of precursor solution: Weigh 3.489g of nickel nitrate hexahydrate (12mmol) into a 100mL glass beaker, then weigh 1.212g of iron nitrate hexahydrate (3mmol) into the beaker, and finally weigh 0.043g Cerium nitrate hexahydrate (0.1 mmol) was added to the above 100 mL beaker. Use a graduated cylinder to measure 100mL of deionized water into a 100mL beaker, put in a magnet, put the beaker on a magnetic stirrer, and stir magnetically for 20 minutes at room temperature to dissolve into a uniform solution;

[0029] (2) Treatment of nickel foam

[0030] Place 1cm X 1.5cm, 0.5mm thick nickel foam in 3moL / L hydrochloric acid for 10min to remove the oxide layer, then rinse with deionized water and ethanol, and dry.

[0031] (3) Preparation of Ce-NiFeLDH / NF

[0032] A clean nickel foam was used as the working electrode, a graphite rod was used as the counter electrode, and Ag / AgCl (saturated KCl solution) was used as the reference electrode. Then, immerse the thr...

Embodiment 2

[0037] (1) Preparation of precursor solution: Weigh 3.489g of nickel nitrate hexahydrate (12mmol) into a 100mL glass beaker, then weigh 1.212g of iron nitrate hexahydrate (3mmol) into the beaker. Use a measuring cylinder to measure 100mL of deionized water into a 100mL beaker, put in a magnet, put the beaker on a magnetic stirrer, and stir magnetically for 20 minutes at room temperature to dissolve into a uniform solution;

[0038] (2) Treatment of nickel foam

[0039] Place 1cm X 1.5cm, 0.5mm thick nickel foam in 3moL / L hydrochloric acid for 10min to remove the oxide layer, then rinse with deionized water and ethanol, and dry.

[0040] (3) Preparation of NiFeLDH / NF

[0041] A clean nickel foam was used as the working electrode, a graphite rod was used as the counter electrode, and Ag / AgCl (saturated KCl solution) was used as the reference electrode. Then, immerse the three electrodes in the precursor solution of step (1), carry out constant current sinking at -20mA for 900s...

Embodiment 3

[0046] (1) Preparation of precursor solution: Weigh 3.489g of nickel nitrate hexahydrate (12mmol) into a 100mL glass beaker, then weigh 1.212g of iron nitrate hexahydrate (3mmol) into the beaker, and finally weigh 0.043g Cerium nitrate hexahydrate (0.1 mmol) was added to the above 100 mL beaker. Use a measuring cylinder to measure 100mL of deionized water into a 100mL beaker, put in a magnet, put the beaker on a magnetic stirrer, and stir magnetically for 20 minutes at room temperature to dissolve into a uniform solution;

[0047] (2) Treatment of nickel foam

[0048] Place 1cm X 1.5cm, 0.5mm thick nickel foam in 3moL / L hydrochloric acid for 10min to remove the oxide layer, then rinse with deionized water and ethanol, and dry.

[0049] (3) Preparation of Ce-NiFeLDH / NF

[0050] A clean nickel foam was used as the working electrode, a graphite rod was used as the counter electrode, and Ag / AgCl (saturated KCl solution) was used as the reference electrode. Then, immerse the thr...

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Abstract

The invention relates to a preparation method and application of a rare earth cerium doped nickel sulfide / iron sulfide heterojunction material. The method comprises the following steps: (1) selecting a three-electrode system, taking foamed nickel as a working electrode, taking a graphite rod as a counter electrode, taking Ag / AgCl (a saturated KCl solution) as a reference electrode, taking a mixed solution of nickel nitrate, ferric nitrate and cerous nitrate as an electrolyte, and carrying out constant-current deposition for 600-900s under-15 to-20mA to prepare a Ce-NiFeLDH / NF precursor taking the foamed nickel as a carrier; and (2) putting the Ce-NiFeLDH / NF precursor with the foamed nickel as the carrier obtained in the previous step and powdered sulfur into a tubular furnace, heating to 300-400 DEG C, and keeping the temperature for 120-150 minutes to obtain the cerium-doped nickel sulfide / iron sulfide heterostructure. The preparation method is simple, convenient and easy to operate, and more catalytic activity centers and better inherent electrocatalytic activity are obtained through doping of rare earth cerium.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and relates to a rare earth cerium-doped nickel sulfide / iron sulfide heterojunction material, a preparation method and an application in electrocatalysis OER. Background technique [0002] The ever-increasing demand for energy and fuels, coupled with the depletion of global fossil fuels and their associated negative environmental impacts, is prompting human pursuit and in-depth research on a variety of high-efficiency, low-cost, sustainable energy conversion and storage technology. The technology of electrically driven water splitting to generate hydrogen and oxygen fuel is considered to be one of the most promising and applicable strategies to realize the conversion of solar energy into electricity, thereby overcoming the shortage of fossil fuels and realizing the conversion and storage of solar energy. However, due to the anodic oxygen evolution reaction OER (4OH - →2H 2 O+4e - +O 2 ) multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/061C25B11/091
CPCC25B1/04C25B11/061C25B11/091Y02P20/133Y02E60/36
Inventor 武兰兰曹佳义李敬德刘桂华
Owner HEBEI UNIV OF TECH
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