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Nitrogen-sulfur double-doped non-metallic carbon-based oxygen reduction catalyst with grading holes and preparation

A double-doped, non-metallic technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of low catalytic performance, poor stability, high cost and large-scale promotion of metal-air battery catalysts, and promote electron transfer. and mass transfer, good stability, and the effect of promoting the oxygen reduction reaction process

Active Publication Date: 2019-05-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material has a hierarchical pore structure of micropores, mesopores and macropores without using a template, and the specific surface area can reach 1261.0214m 2 / g, the synthesis method is simple, and the cost of raw materials is low, which solves the problems of low catalytic performance, poor stability and high cost of metal-air battery catalysts, which are difficult to promote on a large scale

Method used

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  • Nitrogen-sulfur double-doped non-metallic carbon-based oxygen reduction catalyst with grading holes and preparation
  • Nitrogen-sulfur double-doped non-metallic carbon-based oxygen reduction catalyst with grading holes and preparation
  • Nitrogen-sulfur double-doped non-metallic carbon-based oxygen reduction catalyst with grading holes and preparation

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Experimental program
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Effect test

Embodiment 1

[0032] Step 1): Weigh 2.659g (15mmol) of thiocyanuric acid, 1.135g (1mmol) of β-cyclodextrin, and 0.5ml of concentrated sulfuric acid (96-97wt%) into 30ml of deionized water, sonicate for 30min until they are evenly mixed , and then transferred to a 100ml eggplant-shaped bottle, and heated up to 100°C while stirring. After the water solvent was completely evaporated, the temperature was raised to 160°C, and the reaction polymerization was carried out for 10 hours. The resulting product is taken out and ground to obtain an organic polymer material containing carbon, nitrogen and sulfur.

[0033] Step 2); put the organic polymer material into a porcelain boat and calcinate it in a high-temperature tube furnace with a gas flow rate of 100mlmin -1 Argon gas, first raise the temperature to 200°C at a heating rate of 5°C / min, hold for 1 hour, then raise the temperature to 350°C at a rate of 1°C / min, hold for 2 hours, then raise the temperature to 1000°C at a heating rate of 5°C / min,...

Embodiment 2

[0035] Step 1): Weigh 2.768g (15mmol) of chloronitrile, 2.614g (15mmol) of 1,3,5-benzenetrithiol, 1.135g (1mmol) of β-cyclodextrin, 0.5ml concentrated sulfuric acid (96- 97wt%) was added to 30ml of deionized water, ultrasonicated for 30min until uniformly mixed, then transferred to a 100ml eggplant-shaped bottle, and heated to 100°C while stirring, and after the water solvent was completely evaporated, the temperature was raised to 160°C, and the reaction polymerization was carried out for 8h. The resulting product is taken out and ground to obtain an organic polymer material containing carbon, nitrogen and sulfur.

[0036] Step 2): Put the organic polymer material into a porcelain boat and calcinate it in a high-temperature tube furnace with a gas flow rate of 100mlmin -1 Argon gas, first raise the temperature to 200°C at a heating rate of 5°C / min, hold for 1 hour, then raise the temperature to 350°C at a rate of 1°C / min, hold for 1 hour, then raise the temperature to 900°C a...

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Abstract

The invention discloses a nitrogen-sulfur double-doped non-metallic carbon-based oxygen reduction catalyst with grading holes and preparation and belongs to the technical field of catalysts. An organic polymer with nitrogen, sulfur and carbon in uniform distribution is synthesized through a simple method, the organic polymer is further subject to high-temperature calcination, a carbonization process, a nitrogenization process and a sulfurization process are completed simultaneously, and then the nitrogen-sulfur double-doped grading hole carbon material is prepared. The material has a grading hole structure under the condition of not using a template, the specific surface area is large, the synthesis method is simple, the raw materials are easy to obtain, cost is low, and the material has efficient oxygen reduction reaction catalytic activity and good stability and has broad application prospects in the fields of metal-air cells, regenerative fuel cells, etc.

Description

technical field [0001] The present invention relates to a method for preparing a non-metallic carbon-based oxygen reduction catalytic material doped with nitrogen and sulfur and having hierarchical pores, in particular to a method that utilizes materials containing carbon, nitrogen and sulfur as reactants, and then undergoes pre-polymerization and high-temperature calcination heat The carbon material electrocatalyst with oxygen reduction catalytic performance is obtained by the solution method, which has broad application prospects in the fields of metal-air batteries, renewable fuel cells, etc., and belongs to the field of catalyst technology. Background technique [0002] Metal-air batteries with ultra-high energy density are considered to be one of the most promising energy storage and conversion devices. Metal-air batteries use light metal as the negative electrode active material and oxygen in the air as the positive electrode active material. Oxygen passes through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCY02E60/50
Inventor 程元徽王雅岚黄海丽郭银建向中华
Owner BEIJING UNIV OF CHEM TECH
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