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N/O double-doped metal carbon coated carbide nanoparticle composite material and preparation thereof

A nanoparticle and carbide technology, applied in chemical/physical processes, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as poor stability, high cost, and scarcity of global reserves, and achieve simple preparation processes , the effect of high scientific research value

Pending Publication Date: 2020-07-24
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most importantly, the high cost, poor stability, and scarcity of global reserves of these noble metals greatly hinder their practical application, so there is an urgent need to develop non-noble metal electrocatalysts with high catalytic activity to facilitate the water electrolysis process.

Method used

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  • N/O double-doped metal carbon coated carbide nanoparticle composite material and preparation thereof
  • N/O double-doped metal carbon coated carbide nanoparticle composite material and preparation thereof
  • N/O double-doped metal carbon coated carbide nanoparticle composite material and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] An N / O double-doped metal carbon-coated transition metal carbide nanoparticle composite material contains Mo, Ni, C, N, and O elements.

[0035] The above-mentioned N / O double-doped metal carbon-coated transition metal carbide nanoparticle composite material preparation method specifically includes the following steps:

[0036] (1) Weigh 10g of urea and dissolve it in 5ml of deionized water, adjust the pH to 6 with 0.1M HCl, stir evenly and dry at 80°C for 10h, put the dried urea in a crucible in a tube furnace under a nitrogen atmosphere Annealed at 550°C for 3 hours, cooled naturally to obtain g-C 3 N 4 ;

[0037] (2) Add 0.1g of Ni(NO 3 ) 2 ·6H 2 O and 0.05gH 8 MoN2O4 was dissolved in 5ml of deionized water to form a homogeneous solution A, 0.2g of g-C 3 N 4 Disperse in solution A, freeze-dry after ultrasonication for 5h to obtain NiMo@C precursor;

[0038] (3) The NiMo@C precursor was mixed with the same mass of zinc powder and ground evenly, then placed in...

Embodiment 2

[0040] (1) Weigh 10g of urea and dissolve it in 5ml of deionized water, adjust the pH to 6 with 0.1M HCl, stir evenly and dry at 80°C for 10h, put the dried urea in a crucible in a tube furnace under a nitrogen atmosphere Annealed at 550°C for 3 hours, cooled naturally to obtain g-C 3 N 4 ;

[0041] (2): 0.1g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 5ml of deionized water to form a homogeneous solution A, and 0.2g of g-C 3 N 4 Disperse in solution A, freeze-dry after ultrasonication for 5h to obtain Ni@C precursor or Mo@C precursor;

[0042] (3): Mix the precursor Ni@C or Mo@C with the same mass of zinc powder and grind them evenly, then place them in a crucible and anneal at 900 °C for 3 hours in a tube furnace under a nitrogen atmosphere, and cool naturally to obtain a Ni@C precursor body.

Embodiment 3

[0044] (1) Weigh 10g of urea and dissolve it in 5ml of deionized water, adjust the pH to 6 with 0.1M HCl, stir evenly and dry at 80°C for 10h, put the dried urea in a crucible in a tube furnace under a nitrogen atmosphere Annealed at 550°C for 3 hours, cooled naturally to obtain g-C 3 N 4 ;

[0045] (2): Add 0.1g H 8 MON 2 o 4 Dissolved in 5ml of deionized water to form a homogeneous solution A, 0.2g of g-C 3 N 4 Disperse in solution A, freeze-dry after ultrasonication for 5 hours to obtain Ni@C precursor or Mo@C precursor;

[0046] (3): The precursor Mo@C was mixed with the same mass of zinc powder and ground evenly, then placed in a crucible and annealed at 900 °C for 3 hours in a tube furnace under a nitrogen atmosphere, and cooled naturally to obtain a Mo@C precursor.

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Abstract

The invention relates to a preparation method of an N / O double-doped metal carbon coated carbide nanoparticle composite material. The preparation method comprises the following steps: (1) dissolving urea in deionized water, regulating the pH value to 4-7, stirring uniformly, and drying; (2) placing the urea obtained by drying in the step (1) in a nitrogen atmosphere, annealing at high temperature,and cooling to obtain g-C3N4; (3) dissolving a metal atom precursor in deionized water to obtain a solution A, dissolving g-C3N4 in the solution A, performing ultrasonic treatment, and performing freeze drying to obtain a carbide precursor; and (4) finally, uniformly mixing and grinding the carbide precursor and zinc powder, and performing high-temperature annealing and cooling in a nitrogen atmosphere to obtain a target product. Compared with the prior art, the nitrogen-oxygen double-doped graphitized carbon in the catalytic material has the advantages that the conductivity of the catalyst is greatly improved, and dissolution of metal ions in the catalyst can be inhibited so that the catalytic performance, the cycling stability and the like of the catalyst can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic total water splitting materials, and relates to a preparation method of an N / O double-doped metal carbon-coated carbide nanoparticle composite material. Background technique [0002] The continuous global warming and the increasing energy crisis make the research and application of sustainable and renewable energy more and more imminent. Due to the high combustion calorific value of hydrogen energy, the heat generated by burning the same mass of hydrogen is about three times that of gasoline. 3.9 times that of coke, and 4.5 times that of coke, and its combustion product is water, which is the cleanest energy in the world, so it is the most promising substitute for traditional fossil energy. Electrocatalytic total water splitting is an environmentally friendly method to produce high-purity hydrogen, which consists of two half-cell reactions: the oxygen evolution reaction (OER) at the anode...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/33
Inventor 闵宇霖罗时文时鹏辉范金辰徐群杰朱晟
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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