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Non-noble metal electrocatalyst based on melaleuca leucadendron bark powder and preparation method and application thereof

A non-precious metal, electrocatalyst technology, used in circuits, electrical components, battery electrodes, etc., can solve the problems of small resources, unstable iron-nitrogen carbon-based ORR electrocatalysts, and high prices, and achieve easy preparation, excellent oxygen reduction. Catalytic activity, low cost effect

Active Publication Date: 2020-01-03
DONGGUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing platinum / carbon ORR electrocatalysts that are expensive, low in resources, and unstable in iron-nitrogen-carbon-based ORR electrocatalysts, and provide a non-precious metal electrocatalyst based on Melaleuca bark powder Preparation

Method used

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  • Non-noble metal electrocatalyst based on melaleuca leucadendron bark powder and preparation method and application thereof
  • Non-noble metal electrocatalyst based on melaleuca leucadendron bark powder and preparation method and application thereof
  • Non-noble metal electrocatalyst based on melaleuca leucadendron bark powder and preparation method and application thereof

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Embodiment 1

[0074] This embodiment provides a non-precious metal electrocatalyst based on Melaleuca bark powder, which is prepared through the following process.

[0075] Add 2-methylimidazole (1.54g), boric acid (1.16g), and melamine (2.363g) into a small amount of ethanol and sonicate for 10 minutes to form a suspension; mix and grind Melaleuca bark powder (3g) with the suspension After 30 minutes, the ground slurry was mixed with cobalt nitrate hexahydrate (0.727 g) and ultrasonically mixed for 30 minutes, then stirred, evaporated to dryness and dried. The product obtained by drying (referred to as the precursor) and the pore-forming agent ZnCl 2 Put it into a mortar and grind it evenly according to the mass ratio of 1:4. The resulting mixture was heated in a tube furnace under the protection of argon at a rate of 2 °C / min to 900 °C for 2 h and then cooled naturally. The product obtained after calcination (denoted as after calcination or before pickling) was treated with 0.5mol / L H ...

Embodiment 2

[0078] This embodiment provides a non-precious metal electrocatalyst based on Melaleuca bark powder, which is prepared through the following process.

[0079] Add 2-methylimidazole (1.54g), boric acid (1.16g), and melamine (2.363g) into a small amount of ethanol and sonicate for 10 minutes to form a suspension; mix and grind Melaleuca bark powder (3g) with the suspension After 30 minutes, the ground slurry was mixed with cobalt nitrate hexahydrate (1.091 g) and ultrasonically stirred for 30 minutes, then evaporated to dryness with stirring and dried. The product obtained by drying and the pore forming agent ZnCl 2 Put it into a mortar and grind it evenly according to the mass ratio of 1:4. The resulting mixture was heated in a tube furnace under the protection of argon at a rate of 2 °C / min to 900 °C for 2 h and then cooled naturally. The product obtained after calcination was treated with 0.5mol / L H 2 SO 4 Acid washing for 4 hours, washing to remove the acid and drying to...

Embodiment 3

[0082] This embodiment provides a non-precious metal electrocatalyst based on Melaleuca bark powder, which is prepared through the following process.

[0083] Add 2-methylimidazole (1.54g), boric acid (1.16g), and melamine (2.363g) into a small amount of ethanol and sonicate for 10 minutes to form a suspension; mix and grind Melaleuca bark powder (3g) with the suspension After 30 minutes, the ground slurry was mixed with cobalt nitrate hexahydrate (1.454 g) and ultrasonically stirred for 30 minutes, then evaporated to dryness with stirring and dried. The product obtained by drying and the pore forming agent ZnCl 2 Put it into a mortar and grind it evenly according to the mass ratio of 1:4. The resulting mixture was heated in a tube furnace under the protection of argon at a rate of 2 °C / min to 900 °C for 2 h and then cooled naturally. The product obtained after calcination was treated with 0.5mol / L H 2 SO 4 Acid washing for 4 hours, washing to remove the acid and drying to...

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Abstract

The invention relates to a non-noble metal electrocatalyst based on melaleuca leucadendron bark powder and a preparation method and an application thereof. The preparation method comprises steps of S1, mixing an imidazole ligand material, a boron source, melamine, the melaleuca leucadendron bark powder and cobalt salt in solvent to obtain suspension, performing ultrasonic treatment, and obtaininga product after drying; S2, mixing the product with pore-forming agent, and performing carbonizing to obtain a carbonized product; and S3, pickling the carbonized product, and performing drying to obtain the non-noble metal electrocatalyst. The preparation method is advantaged in that the preparation method has simple process flow, low raw material cost, convenience in macro preparation, suitability for industrial production and the like, the prepared non-noble metal electrocatalyst has electrocatalytic oxygen reduction (ORR) performance similar to that of commercial Pt / C catalyst and even higher and more stable than that of the commercial Pt / C catalyst, and is expected to be applied to new energy devices of large zinc-air batteries, aluminum-air batteries and fuel batteries.

Description

technical field [0001] The invention relates to the field of inorganic nanometer materials and electrochemical catalysis, in particular to a non-precious metal electrocatalyst based on Melaleuca bark powder and its preparation method and application. Background technique [0002] The oxygen reduction reaction (ORR) plays a key role in fuel cells. Due to the complex process and high energy barrier of the oxygen reduction reaction, high-performance electrocatalysts are required to promote the smooth progress of the reaction. Pt-based catalysts are considered to be the most effective oxygen reduction electrocatalysts; however, metal Pt is expensive and the earth’s resource reserves are small, which cannot meet the needs of large-scale applications. Pt-based catalytic materials. In this context, international materials scientists have developed a variety of methods to prepare non-platinum catalysts, such as carbon-supported metal macrocycles (ACS Energy Lett.2018, 3, 252), met...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/90H01M4/9041H01M4/9083Y02E60/50
Inventor 陈德良杨华明李铭李涛杨震宇孙成华崔立峰李超林晓莹
Owner DONGGUAN UNIV OF TECH
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