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A kind of nickel selenide and ternary nickel-iron selenide composite electrocatalyst and its preparation method and application

An electrocatalyst, nickel-iron selenide technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., to achieve the effects of good stability, good stability, and high catalytic activity

Active Publication Date: 2020-05-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But not yet about NiSe 2 Research on other morphologies, so how to prepare NiSe with larger specific surface area 2 It is a technical problem that needs to be solved in this field

Method used

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  • A kind of nickel selenide and ternary nickel-iron selenide composite electrocatalyst and its preparation method and application
  • A kind of nickel selenide and ternary nickel-iron selenide composite electrocatalyst and its preparation method and application
  • A kind of nickel selenide and ternary nickel-iron selenide composite electrocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Weighing of selenium powder

[0034] (1) Weigh 60 mg of selenium powder and put it into the bottom of the quartz tube.

[0035] 2. Pretreatment of nickel-iron foam

[0036] (1) The nickel foam was impregnated with 1mol / L hydrochloric acid solution, acetone solution, and absolute ethanol solution for 10 min and ultrasonically cleaned for 10 minutes, and finally cleaned three times with distilled water ultrasonically.

[0037] Preparation of 3.1mol / L KOH solution

[0038] (1) Measure about 50mL of ultrapure water and 5.61g of potassium hydroxide, dissolve them with ultrapure water and stir, after cooling, dilute to volume in a 100mL volumetric flask.

[0039] 4. In situ growth of NiSe on the surface of nickel-iron alloy foam 2 and ternary NiFe 2 Se 4 Preparation of composite electrocatalyst

[0040] (1) Put the pretreated foam nickel-iron alloy and the weighed selenium powder into the quartz tube, and vacuum seal the tube;

[0041] (2) Put the sealed quartz tube...

Embodiment 2

[0044] 1. Weighing of selenium powder

[0045] (1) Weigh 40 mg of selenium powder and put it into the bottom of the quartz tube.

[0046] 2. Pretreatment of nickel-iron foam

[0047] (1) The nickel foam was impregnated with 1mol / L hydrochloric acid solution, acetone solution, and absolute ethanol solution for 10 min and ultrasonically cleaned for 10 minutes, and finally cleaned three times with distilled water ultrasonically.

[0048] Preparation of 3.1mol / L KOH solution

[0049] (1) Measure about 50mL of ultrapure water and 5.61g of potassium hydroxide, dissolve them with ultrapure water and stir, after cooling, dilute to volume in a 100mL volumetric flask.

[0050] 4. In situ growth of NiSe on the surface of nickel-iron alloy foam 2 and ternary NiFe 2 Se 4 Preparation of composite electrocatalyst

[0051] (1) Put the pretreated foam nickel-iron alloy and the weighed selenium powder into the quartz tube, and vacuum seal the tube;

[0052] (2) Put the sealed quartz tube...

Embodiment 3

[0054] 1. Weighing of selenium powder

[0055] (1) Weigh 80 mg of selenium powder and put it into the bottom of the quartz tube.

[0056] 2. Pretreatment of nickel-iron foam

[0057] (1) The nickel foam was impregnated with 1mol / L hydrochloric acid solution, acetone solution, and absolute ethanol solution for 10 min and ultrasonically cleaned for 10 minutes, and finally cleaned three times with distilled water ultrasonically.

[0058] Preparation of 3.1mol / L KOH solution

[0059] (1) Measure about 50mL of ultrapure water and 5.61g of potassium hydroxide, dissolve them with ultrapure water and stir, after cooling, dilute to volume in a 100mL volumetric flask.

[0060] 4. In situ growth of NiSe on the surface of nickel-iron alloy foam 2 and ternary NiFe 2 Se 4 Preparation of composite electrocatalyst

[0061] (1) Put the pretreated foam nickel-iron alloy and the weighed selenium powder into the quartz tube, and vacuum seal the tube;

[0062] (2) Put the sealed quartz tube...

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Abstract

The invention discloses a nickel selenide and ternary nickel iron selenide composite electrocatalyst, which includes a foamed nickel iron alloy and a layered electrocatalyst grown in situ on the surface of the foamed nickel iron alloy. The layered electrocatalyst includes NiSe 2 andNiFe 2 Se 4 , the layered electrocatalyst is a three-dimensional nanofold structure. The invention also provides a preparation method of the composite electrocatalyst: ultrasonic cleaning of the foamed nickel-iron alloy; placing selenium powder at the bottom of the quartz tube, fixing the foamed nickel-iron alloy in the middle of the quartz tube, and vacuum-sealing the tube; placing the quartz tube in a tube furnace for calcination , a layered electrocatalyst with a three-dimensional nanowrinkle structure grown in situ on the surface of foamed nickel-iron alloy. The present invention also provides the application of the composite electrocatalyst as an anode catalytic material to electrocatalytically split water to produce oxygen under alkaline conditions. The composite electrocatalyst prepared by this method has a three-dimensional nano-fold structure, which increases the electrochemical surface area of ​​the composite electrocatalyst, and has high activity and good stability for the electrocatalytic oxygen evolution reaction.

Description

technical field [0001] The invention belongs to the technical field of nanometer material technology and electrochemical energy conversion, in particular to a NiSe 2 and NiFe 2 Se 4 Composite electrocatalyst, preparation method and application. Background technique [0002] With the increasing energy crisis and environmental pollution problems. As a green renewable energy, hydrogen energy is clean and efficient compared to other traditional fuels such as coal. Water electrolysis is a promising renewable energy storage method for large-scale conversion into high-energy-density clean hydrogen and oxygen. In previous studies, most OER electrocatalysts were based on noble metal (Ru and Ir) compounds because of their high stability and good catalytic activity. However, these noble metal compounds are scarce on earth, which limits their large-scale applications. Therefore, to replace noble metals with earth-abundant elements, it is necessary to develop cost-effective non-pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01J35/04C25B1/04C25B11/06
CPCB01J27/0573C25B1/04C25B11/04B01J35/33B01J35/56Y02E60/36
Inventor 侯阳袁佳欣杨彬雷乐成
Owner ZHEJIANG UNIV
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