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Electrocatalyst for sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction, and preparation method and application thereof

A transition metal and electrocatalyst technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of large particle size and performance gap of electrocatalysts, and achieve the effects of simple steps, convenient operation, and good oxygen reduction catalytic performance.

Inactive Publication Date: 2019-03-15
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods only use a nitrogen-containing ligand, and the prepared electrocatalyst has a large particle size, which has a large gap in performance compared with platinum-based electrocatalysts, and has catalytic performance in a single electrolyte.
Control specific structures of carbon source, nitrogen source, sulfur source and metal source at the molecular level, and obtain a nitrogen-sulfur-transition metal co-doped carbon-based non-precious gold oxygen reduction electrocatalyst through a bottom-up molecular reaction process, Not yet reported

Method used

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  • Electrocatalyst for sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction, and preparation method and application thereof
  • Electrocatalyst for sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction, and preparation method and application thereof
  • Electrocatalyst for sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 13.45mmol 2,4-dihydroxybenzaldehyde, 055mmol 2-formylpyridine, 13.45mmol thiosemicarbazide and 14.83mmol cobalt chloride hexahydrate in a container, add 22mL ethanol and stir the reaction for 24h; mix the obtained The solution is placed in a hydrothermal kettle, the reaction temperature is 120°C, and the reaction time is 24h; then the obtained reactant is placed in an oxidation furnace, and the temperature is raised to 280°C at a heating rate of 2°C / min and cooled to room temperature after a constant temperature of 4h; The obtained oxide was placed in a tube furnace, raised to 900°C at a rate of 2°C / min in a nitrogen atmosphere, kept at a constant temperature for 3 hours, and then lowered to room temperature; the product was taken out of the tube furnace, washed with 1M dilute hydrochloric acid, and then washed with Wash with deionized water to neutrality and dry to obtain a carbon-based non-noble metal oxygen reduction electrocatalyst. The resulting product is marke...

Embodiment 2

[0043] Put 12.65mmol 3,5-diaminobenzaldehyde, 37.95mmol thiourea, 10.32mmol thiosemicarbazide and 23.65mmol cobalt chloride hexahydrate in a container, add 22mL ethanol and stir the reaction for 12h; In a hydrothermal kettle, the reaction temperature is 150°C, and the reaction time is 20h; then the obtained reactant is placed in an oxidation furnace, the temperature is raised to 300°C at a heating rate of 5°C / min, and the temperature is kept at a constant temperature for 6h and then cooled to room temperature; then the obtained The oxide is placed in a tube furnace, raised to 1000 °C at a rate of 5 °C / min in a nitrogen atmosphere, kept at a constant temperature for 5 hours, and then lowered to room temperature; the product is taken out of the tube furnace, washed with 1M dilute hydrochloric acid, and then deionized Wash with water to neutrality and dry to obtain carbon-based non-noble metal oxygen reduction electrocatalyst. The obtained product is marked as C-2. The appearance ...

Embodiment 3

[0047] Put 11.32mmol of p-aminobenzaldehyde, 37.95mmol of thioacetamide and 12.58mmol of ferric chloride in a container, add 12mL of ethanol and 10mL of distilled water and stir the reaction for 18h; place the resulting mixed solution in a hydrothermal kettle, and the reaction temperature 90°C, the reaction time is 24h; then the obtained reactant is placed in an oxidation furnace, the temperature is raised to 260°C at a heating rate of 5°C / min and the temperature is kept at a constant temperature for 5h, and then cooled to room temperature; then the obtained oxide is placed in a tube furnace, In a nitrogen atmosphere, the temperature was raised to 900°C at a rate of 10°C / min and kept at a constant temperature for 4 hours, and then lowered to room temperature; the product was taken out of the tube furnace, washed with 1M dilute hydrochloric acid, then washed with deionized water until neutral, and dried, that is Obtain carbon-based non-noble metal oxygen reduction electrocatalys...

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Abstract

The invention provides an electrocatalyst for sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction. The C:N:S:O:M mass ratio is 50-80:2-15:0.1-6:3-20:0.01-8, where M represents a transition metal, and the specific surface area of the catalyst is 450-1900 m2 / g. The electrocatalyst provided by the invention has the advantages of good electrocatalytic performance and stability of cathode oxygen reduction under both acidic and basic conditions.

Description

technical field [0001] The invention belongs to the field of new energy materials and electrocatalysis, and in particular relates to a sulfur-nitrogen-transition metal co-doped carbon-based oxygen reduction electrocatalyst, a preparation method and an application. Background technique [0002] With the rapid development of the economy and the deteriorating environment, efficient and clean electrochemical energy conversion devices such as fuel cells and metal-air batteries can directly convert chemical energy into electrical energy, and have outstanding advantages such as green, high efficiency and zero pollution, and are currently in urgent need of development. One of the energy devices. Oxygen reduction reaction is an important electrode reaction process in fuel cells and metal-air batteries. At present, the commonly used electrocatalysts for oxygen reduction reaction are platinum-based noble metal catalytic materials. Such materials are usually expensive, easily poisoned,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/8825H01M4/9041H01M4/9083Y02E60/50
Inventor 李开喜许菲菲赵江红
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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