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Preparation method and application of non-noble metal monatomic difunctional electrocatalyst

A non-precious metal, electrocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, circuits, etc., can solve the problems of low active site density, challenges in single-atom catalysts, high preparation costs, etc., and achieve excellent electrochemistry performance, superior electrocatalytic properties, and large active site density

Pending Publication Date: 2021-01-15
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional chemical approaches, such as wet impregnation, co-precipitation, and photodeposition, these methods usually have defects such as cumbersome synthesis steps, low active site density, high preparation cost, poor reproducibility, and single catalytic properties.
[0004] In addition, due to the relatively high energy of single atoms and the lack of strong interaction between single atoms and supports, the aggregation of single atoms into clusters or nanoparticles is unavoidable to a certain extent, and these factors limit the ability of single-atom catalysts. practical industrial applications
In order to meet the industrial requirements of low preparation cost, large-scale production, and good reproducibility, advanced synthetic methods are urgently needed, but there are still challenges for the preparation of single-atom catalysts.

Method used

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  • Preparation method and application of non-noble metal monatomic difunctional electrocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A method for preparing a non-noble metal monoatomic bifunctional electrocatalyst, specifically comprising the following steps:

[0047] 1) Weigh 150 mg of activated carbon spheres and add to 60 ml of deionized water to form A solution.

[0048] 2) Weigh 0.5g CuCl 2 2H 2 O, add 60ml deionized water to form B solution. .

[0049] 3) After mixing the solutions A and B, stir at room temperature for 20 h.

[0050] 4) Wash with deionized water and dry at 50 degrees.

[0051] 5) Grinding 100 mg of the powder obtained in step 4) with 500 mg of urea to obtain a mixed solid powder.

[0052] 6) Put the mixed solid powder obtained in step 5) in a tube furnace, under an inert gas, heat up to 500-1000°C at a heating rate of 2°C / min, and keep it warm for 3 hours to obtain.

Embodiment 2

[0054] A method for preparing a non-noble metal monoatomic bifunctional electrocatalyst, specifically comprising the following steps:

[0055] 1) Weigh 150 mg of activated carbon spheres and add to 60 ml of deionized water to form A solution 1.

[0056] 2) Weigh 0.5g Cu(NO 3 ) 2 , Add 60ml deionized water to form B solution.

[0057] 3) After mixing the solutions A and B, stir at room temperature for 20 h.

[0058] 4) Wash with deionized water and dry at 50 degrees.

[0059] 5) Grinding 100 mg of the powder obtained in step 4) with 500 mg of urea to obtain a mixed solid powder.

[0060] 6) Put the mixed solid powder obtained in step 5) in a tube furnace, under an inert gas, heat up to 1000°C at a heating rate of 2°C / min, and keep it warm for 3 hours to obtain.

Embodiment 3

[0062] A method for preparing a non-noble metal monoatomic bifunctional electrocatalyst, specifically comprising the following steps:

[0063] 1) Weigh 150 mg of activated carbon spheres and add to 60 ml of deionized water to form A solution.

[0064] 2) Weigh 0.5g Cu(CH 3 COO) 2 , Add 60ml deionized water to form B solution.

[0065] 3) After mixing the solutions A and B, stir at room temperature for 20 h.

[0066] 4) Wash with deionized water and dry at 50 degrees.

[0067] 5) Grinding 100 mg of the powder obtained in step 4) with 500 mg of urea to obtain a mixed solid powder.

[0068] 6) Put the mixed solid powder obtained in step 5) in a tube furnace, under an inert gas, heat up to 1000°C at a heating rate of 2°C / min, and keep it warm for 3 hours to obtain.

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Abstract

The invention discloses a preparation method of a non-noble metal monatomic difunctional electrocatalyst, and belongs to the technical field of nano material preparation. According to the invention, metal salts such as Cu, Fe, Ni, Co, Mn, rare earth and the like and corresponding hydrates thereof have a strong adsorption effect with porous carbon spheres in an aqueous solution, and are further mixed with a nitrogen source under the protection of inert gas to obtain the non-noble metal monatomic difunctional electrocatalyst through a high-temperature reaction; the preparation method disclosed by the invention is simple, low in cost and mild in reaction, has certain universality and is beneficial to industrial large-scale production; and the monatomic bifunctional electrocatalyst has a largespecific surface area and excellent electrochemical properties, so the monatomic bifunctional electrocatalyst is suitable for oxygen reduction and oxygen evolution reactions, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a preparation method of a non-noble metal single-atom dual-function electrocatalyst, in particular to a highly efficient, corrosion-resistant non-noble metal single-atom dual-function electrocatalyst and its reaction in oxygen reduction and oxygen evolution in the application. Background technique [0002] With increasing attention to renewable energy storage and conversion technologies, such as metal-air batteries and fuel cells. Among various energy storage devices, zinc-air battery (ZAB) is considered as one of the most promising technologies. Due to its high theoretical specific energy density (1086wh / kg) to replace lithium-ion batteries for electric vehicles and other energy-demanding devices. It has low cost, good safety and excellent properties. For rechargeable air batteries, Pt and Ir / Ru-metal-based materials have been widely used for oxygen reduction a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/08B01J35/10H01M4/90
CPCB01J27/24H01M4/9041H01M4/9083B01J35/33B01J35/618B01J35/51Y02E60/50
Inventor 宗玲博吴伟翠陈新张文君王磊
Owner QINGDAO UNIV OF SCI & TECH
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