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Dual-function oxygen electrode catalyst containing non-noble-metal nanoparticles coated with nitrogen-doped porous carbon layer and preparation method of dual-function oxygen electrode catalyst

A bifunctional catalyst and nitrogen-doped porous carbon technology, which is applied in the field of non-noble metal catalysts and their preparation, can solve problems such as consumption, and achieve the effects of simple preparation process, increased effective surface area, and cheap raw materials

Inactive Publication Date: 2017-05-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this type of catalyst needs to etch and remove the hard template silica, which consumes a large amount of lye such as sodium hydroxide

Method used

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  • Dual-function oxygen electrode catalyst containing non-noble-metal nanoparticles coated with nitrogen-doped porous carbon layer and preparation method of dual-function oxygen electrode catalyst
  • Dual-function oxygen electrode catalyst containing non-noble-metal nanoparticles coated with nitrogen-doped porous carbon layer and preparation method of dual-function oxygen electrode catalyst
  • Dual-function oxygen electrode catalyst containing non-noble-metal nanoparticles coated with nitrogen-doped porous carbon layer and preparation method of dual-function oxygen electrode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of Co-N-Carbon-800 bifunctional oxygen electrode catalyst

[0036]Co-N-Carbon-800 preparation process is as follows: take 0.75g melamine, 0.5g (0.10g / mL) P123, 7.5mL (1wt%) Co(NO 3 ) 2 , 7.5mL of ultra-pure water, and the mixed solution was stirred and dispersed with a magnetic stirrer for 2 hours, and then ultrasonicated for 5 hours until the dispersion was uniform, and fully dried in a 60°C oven to obtain the precursor. The above precursor was ground into powder and placed in a quartz boat, under N 2 Under the protection of the atmosphere, the temperature was raised to 800°C at a heating rate of 5°C / min and kept for 2 hours, and then cooled to room temperature with the furnace to collect the product. Use 0.5mol / L H for the preliminary product 2 SO 4 Wash in the solution for 8 hours to remove unstable impurities, then wash the sample with deionized water until neutral, dry it in an oven at 60°C, and then grind it into powder to obtain Co-N-Carbon-80...

Embodiment 2

[0043] Preparation of Co-N-Carbon-700 Bifunctional Oxygen Electrode Catalyst

[0044] Co-N-Carbon-700 preparation process is as follows: take 0.80g dicyandiamide, 0.5g (0.10g / mL) P123, 8.0mL (1wt%) of CoSO 4 , 8.0mL of ultrapure water, and the mixed solution was first stirred and dispersed with a magnetic stirrer for 3 hours, and then ultrasonicated for 2 hours until the dispersion was uniform, and fully dried in a 60°C oven to obtain the precursor. The above precursor was ground into powder and placed in a quartz boat, under N 2 Under the protection of the atmosphere, the temperature was raised to 700°C at a heating rate of 3°C / min for 2.5 hours, and then cooled to room temperature with the furnace to collect the product. Use 0.5mol / L H for the preliminary product 2 SO 4 Wash in the solution for 6 hours to remove unstable impurities, then wash the sample with deionized water until neutral, dry it in an oven at 60°C, and then grind it into powder to obtain Co-N-Carbon-700 b...

Embodiment 3

[0046] Preparation of Co-N-Carbon-900 Bifunctional Oxygen Electrode Catalyst

[0047] Co-N-Carbon-900 preparation process is as follows: Take 0.80g cyanamide, 0.5g (0.10g / mL) F127, 7.5mL (1wt%) of CoSO 4 , 8.0mL of ultrapure water, and the mixed solution was first stirred and dispersed with a magnetic stirrer for 3 hours, and then ultrasonicated for 3 hours until the dispersion was uniform, and fully dried in an oven at 80°C to obtain the precursor. The above precursor was ground into powder and placed in a quartz boat, under N 2 Under the protection of the atmosphere, the temperature was raised to 900°C at a heating rate of 5°C / min and kept for 1.5h, and then cooled to room temperature with the furnace to collect the product. Use 0.5mol / L H for the preliminary product 2 SO 4 Wash in the solution for 6 hours to remove unstable impurities, then wash the sample with deionized water until neutral, dry it in an oven at 80°C, and then grind it into powder to obtain Co-N-Carbon-9...

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Abstract

The invention relates to the field of catalysts for energy-producing devices such as fuel cells, metal-air cells, electrolysed water and the like, in particular to a dual-function non-noble-metal catalyst and a preparation method thereof. The structure of the dual-function catalyst with activity of realizing oxygen reduction and oxygen release simultaneously is that non-noble-metal nanoparticles are dispersedly coated with a two-dimensional nitrogen-doped porous carbon layer, and the active center of the catalyst is the non-noble-metal nanoparticles coated with nitrogen-carbon, non-noble-metal-nitrogen-carbon and the carbon layer. The non-noble-metal oxygen electrode catalyst has the advantages that raw materials are cheap, a preparation process is simple and template removal and other complicated operating steps are avoided, thereby being suitable for commercial production and capable of substantially reducing cost under the premise that catalytic performance is guaranteed.

Description

technical field [0001] The invention relates to the field of catalysts for energy production devices such as fuel cells, metal-air batteries, and electrolyzed water, and in particular to a non-precious metal catalyst with dual functions and a preparation method thereof. Background technique [0002] Due to the increasing shortage of oil, natural gas, coal and other resources on the earth, and the increasing damage to the environment when using resources, facing the pressure of energy and the environment, researchers from all over the world are trying to explore new energy sources and new energy utilization methods to alleviate this problem. Hydrogen fuel cells, metal-air batteries, electrolyzed water devices, and integrated renewable fuel cells are considered to be the key to solving future energy problems. However, due to the slow reaction kinetics rate of the oxygen electrode involved, the energy conversion efficiency is low, so corresponding catalysts are needed to incre...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24
Inventor 沈建华朱以华孟璐刘艳艳赵淑楠徐腾警脱金芹
Owner EAST CHINA UNIV OF SCI & TECH
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