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Method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by using annealing method and application of method

A technology of nitrogen doping and nickel sulfide, applied in the field of electrocatalytic hydrogen evolution, to achieve the effects of simple method, increased electrical conductivity, and enhanced hydrogen evolution reaction activity

Active Publication Date: 2018-11-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are currently no reports on nitrogen-doped nickel sulfide (N-Ni 3 S 2 / NF) Nanomaterials' Electrocatalytic Hydrogen Evolution Performance in Alkaline

Method used

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  • Method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by using annealing method and application of method
  • Method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by using annealing method and application of method
  • Method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by using annealing method and application of method

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Effect test

Embodiment 1

[0042] The method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by annealing method is to weigh 0.5 g thiourea and place it in a porcelain boat, and transfer it to the upstream of the temperature-programmed tube furnace, then take a piece of processed nickel foam and place it in another A ceramic boat, and transfer it to the downstream of the temperature-programmed tube furnace, under the protection of nitrogen, heat the temperature-programmed tube furnace to 400 °C at a heating rate of 5 °C / min, keep it for 90 min, and cool it down to room temperature naturally , taken out, that is, nitrogen-doped nickel sulfide (N-Ni 3 S 2 / NF).

Embodiment 2

[0044] The method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by annealing method is to weigh 1.0 g thiourea and place it in a porcelain boat, and transfer it to the upstream of the temperature-programmed tube furnace, and then take a piece of processed nickel foam and place it in another A ceramic boat, and transfer it to the downstream of the temperature-programmed tube furnace, under the protection of nitrogen, heat the temperature-programmed tube furnace to 400 °C at a heating rate of 5 °C / min, keep it for 90 min, and cool it down to room temperature naturally , taken out, that is, nitrogen-doped nickel sulfide (N-Ni 3 S 2 / NF).

Embodiment 3

[0046] The method for preparing nitrogen-doped nickel sulfide hydrogen evolution catalyst by annealing method takes 1.5 g thiourea and places it in a porcelain boat, and transfers it to the upstream of the temperature-programmed tube furnace, then takes a piece of processed nickel foam and places it in another A ceramic boat, and transfer it to the downstream of the temperature-programmed tube furnace, under the protection of nitrogen, heat the temperature-programmed tube furnace to 400 °C at a heating rate of 5 °C / min, keep it for 90 min, and cool it down to room temperature naturally , taken out, that is, nitrogen-doped nickel sulfide (N-Ni 3 S 2 / NF).

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Abstract

The invention belongs to the technical field of electro-catalytic hydrogen evolution and relates to a method for preparing a nitrogen-doped nickel sulfide hydrogen evolution catalyst by using an annealing method. The method comprises the following steps of: weighing thiourea in a porcelain boat; transferring the porcelain boat to the upstream part of a temperature programming tubular furnace; placing a piece of pretreated foamed nickel at another porcelain boat; moving the porcelain boat to the downstream part; heating to the temperature of 300-500 DEG C under the protection of inert gas, calcining and maintaining the temperature for 30-100 min; and naturally cooling to room temperature to obtain the nitrogen-doped nickel sulfide hydrogen evolution catalyst. According to the method provided by the invention, the prepared catalyst is used as a working electrode for electrolyzing water to evolve hydrogen under an alkaline condition. According to the method provided by the invention, thefoamed nickel is taken as a base; the thiourea is taken as a sulfur source and a nitrogen source; a nitrogen-doped nickel sulfate electro-catalyst synthesized by using a one-step annealing method remarkably changes the form and the electronic structure of Ni3S2; more surface active sites are exposed; the electric conductivity is improved; and the hydrogen evolution reaction activity is enhanced. The method provided by the invention overcomes the shortcomings that various nickel sulfates are low in electric conductivity, small in amount of surface active sites and the like and improves the electro-catalytic hydrogen evolution performance of the nickel sulfates; the nickel sulfates are extremely good in stability under the alkaline condition; and the method is expected to be industrialized.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic hydrogen evolution, and relates to the preparation of a hydrogen evolution catalyst, in particular to a method for preparing a nitrogen-doped nickel sulfide hydrogen evolution catalyst by an annealing method and an application thereof. Background technique [0002] The development of today's society is overly dependent on fossil fuels, and the excessive consumption of fossil fuels has exacerbated environmental pollution and energy crises. Therefore, it is imminent to develop clean, renewable and environmentally friendly alternative energy sources. Compared with various alternative energy sources, hydrogen is considered to be the most promising energy carrier to replace traditional fossil fuels due to its high combustion value and the combustion product is only water. Hydrogen production by electrolysis of water is considered to be a green and sustainable hydrogen production method. Nobl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03C25B11/06C25B1/04B01J27/24
CPCB01J27/24C25B1/04C25B11/031C25B11/057C25B11/075Y02E60/36
Inventor 施伟东姚惠玲余芙荣张正媛王勃陆亚辉徐远翔周赛瑜
Owner JIANGSU UNIV
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