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Nickel selenide/ferronickel substrate material as well as preparation method and application thereof

A base material, a technology of nickel selenide, applied in the field of electrocatalytic materials, can solve the problem of low catalytic performance of nickel selenide, etc., and achieve the effects of simple synthesis path, low reaction temperature and low ionic strength

Active Publication Date: 2020-12-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared nickel selenide has good catalytic performance under both alkaline and neutral conditions is very rare

Method used

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  • Nickel selenide/ferronickel substrate material as well as preparation method and application thereof
  • Nickel selenide/ferronickel substrate material as well as preparation method and application thereof
  • Nickel selenide/ferronickel substrate material as well as preparation method and application thereof

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preparation example Construction

[0031] The invention discloses a preparation method of nickel selenide / nickel-iron base material, which comprises the following steps:

[0032] Step 1: Pretreatment of foamed ferronickel; pretreatment includes: first, ultrasonically clean the foamed ferronickel cut into 1.5cm×4cm in acetone solution for 10 to 15 minutes, and then place it in an appropriate concentration of 1 to 2mol / L Ultrasonic cleaning in hydrochloric acid solution for 10-15s, then alternately washing with absolute ethanol and ultrapure water for 2-3 times, and finally vacuum-drying at 30-40°C for 8-10 hours before use;

[0033] Step 2: Pour 75-80 mg of selenium powder into 2-3 mL of hydrazine hydrate solution with a mass concentration of 50%, and stir evenly until a wine-red transparent solution A appears; preferably, magnetic stirring is used for stirring, and the temperature is 60-60 65°C, the time is 30-40min, and the speed is 400-500r / min;

[0034] Step 3: Pour 5.77-17.42 mg of sodium lauryl sulfate an...

Embodiment 1

[0039] 1) Pretreatment of foamed ferronickel: First, ultrasonically clean the foamed ferronickel with a size of 1.5cm×4cm in acetone solution for 10 minutes, then pour it into the prepared 1mol / L hydrochloric acid and ultrasonically clean it for 15s, and then separate Rinse twice alternately with absolute ethanol and ultrapure water, and finally vacuum-dry at 34°C for 10 hours before use;

[0040] 2) Pour 75mg of selenium powder into 2mL of hydrazine hydrate solution with a mass concentration of 50%, and magnetically stir at a speed of 400r / min at a temperature of 60°C for 40min until a wine-red transparent solution A appears;

[0041] 3) Pour 5.77mg of sodium lauryl sulfate and 36.18mg of vanadium trichloride into a 50mL p-polyphenyl liner filled with absolute ethanol solvent, and stir at room temperature for 20min to obtain solution B, Then pour solution A into solution B, put the pretreated ferronickel foam into mixed solution C, and carry out hydrothermal reaction at a tem...

Embodiment 2

[0046] 1) Foamed ferronickel pretreatment: First, ultrasonically clean the foamed ferronickel with a size of 1.5cm×4cm in acetone solution for 11 minutes, then pour it into the prepared 2mol / L hydrochloric acid for ultrasonic cleaning for 12s, and then use anhydrous Alternately wash with ethanol and ultrapure water for 3 times, and finally vacuum-dry at 40°C for 8 hours before use;

[0047] 2) Pour 76mg of selenium powder into 3mL of hydrazine hydrate solution with a mass concentration of 50%, and magnetically stir at a speed of 450r / min at a temperature of 61°C for 35min until a wine-red transparent solution A appears;

[0048] 3) Pour 8.1mg of sodium lauryl sulfate and 37.75mg of vanadium trichloride into a 50mL p-polyphenyl liner filled with absolute ethanol solvent, and stir at room temperature for 19min to obtain solution B, Then pour solution A into solution B, put the pretreated foamed ferronickel into mixed solution C, and carry out hydrothermal reaction at a temperatu...

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Abstract

The invention discloses a nickel selenide / ferronickel substrate material as well as a preparation method and application thereof, which are applied to the field of electrocatalysis. In the preparationmethod, selenium powder is used as a selenium source, lauryl sodium sulfate is used as a morphology regulating agent, vanadium trichloride is used as a vanadium source, foamed ferronickel is used asa nickel source, vanadium-doped nickel selenide grows on the foamed ferronickel in situ by adopting a solvothermal reaction method, and the foamed ferronickel has high conductivity, so that in-situ vanadium, nickel selenide and the conductive substrate foamed ferronickel are compounded, the contact resistance can be effectively reduced, the distribution of the catalyst is improved, electrons can be quickly transmitted to the surface of the catalyst and participate in the reaction, and the electrocatalytic activity and stability of the catalyst are improved. The prepared nickel selenide / ferronickel substrate material is applied to the field of electrocatalysis, and has excellent HER and OER performances under alkaline and neutral conditions.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, and in particular relates to a nickel selenide / nickel-iron base material and a preparation method and application thereof. Background technique [0002] Hydrogen energy is considered as a sustainable and clean energy alternative to dwindling fossil fuels. Electrochemical water splitting is a mature commercial technology that converts electrical energy generated by intermittent renewable energy sources (such as solar energy, wind energy, etc.) into chemical energy stored in hydrogen fuel, which solves the problem of efficient storage and transportation. Currently, Ir-based and Ru-based compounds have high oxygen evolution performance (OER), and Pt group metals are the most effective hydrogen evolution (HER) catalysts, but their lack of resources and high cost greatly limit their wide application. Therefore, it is imminent to design OER and HER catalysts composed of earth-abundant element...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03B01J27/057B01J35/00C25B1/04
CPCC25B1/04B01J27/0573B01J35/33Y02E60/36
Inventor 曹丽云何丹阳冯亮亮黄剑锋吴建鹏牛梦凡
Owner SHAANXI UNIV OF SCI & TECH
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