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Self-supporting nitrogen-doped metal catalyst and preparation method thereof

A metal catalyst and nitrogen doping technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of high price and scarcity obstacles, and achieve simple equipment, increased active sites, high conductivity and stability Effect

Active Publication Date: 2021-12-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although currently used Pt-based electrocatalytic hydrogen production catalysts and Ir or Ru-based electrocatalytic oxygen evolution catalysts have extremely high catalytic efficiency, their high price and scarcity hinder large-scale commercial applications.

Method used

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  • Self-supporting nitrogen-doped metal catalyst and preparation method thereof
  • Self-supporting nitrogen-doped metal catalyst and preparation method thereof
  • Self-supporting nitrogen-doped metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Use acetone, ethanol, and deionized water to ultrasonically clean foamed nickel for 30-60 minutes in order to remove surface oil and adsorbed impurities, then soak in 0.05mol / L HCl solution for 5 minutes, and then use deionized water to ultrasonically clean for 30-60 minutes , and then put it in a vacuum oven at 50-80°C for later use.

[0047]Take 100mg of the above-mentioned treated foamed nickel and put it on the porous quartz support in the porcelain boat, fill the bottom of the support with 600mg of fully ground thiourea powder, the distance between the two is 1cm, cover the upper part of the porcelain boat with a cover plate with holes and put it in Carry out calcination at 550°C in a tube furnace filled with an inert atmosphere, the heating rate is 10°C / min, slowly anneal after holding for 2 hours, take it out, the cooling rate is 5°C / min, and then put it into CS 2 Ultrasound in the solution for 20min, then soak in ethanol solution for ultrasonication for 2h, take...

Embodiment 2

[0056] According to the method described in embodiment 1, nickel foam is pretreated.

[0057] Take 100mg of treated foamed nickel and put it on the porous quartz support in the porcelain boat, fill the bottom of the support with 300mg of fully ground thiourea powder, the distance between the two is 2cm, cover the upper part of the porcelain boat with a perforated cover plate and put it in an inert Carry out calcination at 500°C in a tube furnace with an atmosphere, the heating rate is 10°C / min, after holding for 2 hours, cool down to 350°C for 1 hour, take it out, and then use it directly, avoiding the process of taking out and enriching sulfur.

[0058] After testing, the prepared sample has a catalytic activity comparable to that of the sample in Example 1.

Embodiment 3

[0060] According to the method described in embodiment 1, nickel foam is pretreated.

[0061] Take 100mg of processed nickel foam and put it on the porous quartz support in the porcelain boat, fill the bottom of the support with 300mg of fully ground methionine, the distance between the two is 2cm, cover the upper part of the porcelain boat with a perforated cover plate and put it in an inert Carry out calcination at 500°C in a tube furnace with an atmosphere, the heating rate is 10°C / min, slowly anneal after holding for 1 hour, take it out, the cooling rate is 5°C / min, put into CS 2 Ultrasound in the solution for 20min, then soak in ethanol solution for ultrasonication for 2h, take it out, put it in a vacuum drying oven, dry it at 60°C for 10h, and take it out.

[0062] After testing, the prepared sample has a catalytic activity comparable to that of the sample in Example 1.

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Abstract

The invention provides a preparation method of a self-supporting nitrogen-doped metal catalyst, comprising the following steps: placing ball-milled nitrogen-sulfur compounds, a quartz porous mesh frame and foamed nickel in sequence from the bottom to the top of a high-temperature ceramic boat, and then using The perforated quartz cover plate covers the high-temperature ceramic boat; the high-temperature ceramic boat is placed in a quartz tube, calcined in an inert atmosphere, and the product is subjected to desulfurization treatment to obtain a self-supporting nitrogen-doped metal catalyst. The prepared self-supporting nitrogen-doped metal catalyst has high water electrolysis efficiency and simultaneously performs OER and HER reactions, and the coupling reaction of the two has a synergistic effect, which increases the catalytic efficiency of total hydrolysis.

Description

technical field [0001] The invention relates to the technical field of fuel cell catalysts, in particular to a self-supporting nitrogen-doped metal catalyst and a preparation method thereof. Background technique [0002] Energy is the source of the survival and development of human society. With the development of economy and the increase of population, the consumption of fossil energy is getting faster and faster. At the same time, excessive consumption of fossil energy has brought about increasingly serious environmental pollution, greenhouse effect, energy The problem has become a worldwide problem that needs to be solved urgently. The expected shortage of fossil energy supply and the resulting environmental problems force us to look for clean and pollution-free renewable energy. Among them, the large-scale application of renewable energy represented by tidal energy, wind energy, solar energy, and geothermal energy is greatly restricted due to the dispersion of energy di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9058Y02E60/50
Inventor 吴长征陈鹏作周天培谢毅
Owner UNIV OF SCI & TECH OF CHINA
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