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N-doped carbon-supported base metal oxygen reduction/oxygen evolution dual-function catalyst

A dual-function catalyst, non-precious metal technology, applied in structural parts, electrical components, battery electrodes, etc., to achieve the effect of simple operation and easy large-scale production

Inactive Publication Date: 2016-12-21
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some current studies deposit transition metal oxides directly on metal substrates such as nickel foam. This method can solve the problem of conductivity to a certain extent, but it cannot be used in rechargeable metal-air because it cannot catalyze the oxygen reduction reaction. Fuel cells and other fields have been applied

Method used

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  • N-doped carbon-supported base metal oxygen reduction/oxygen evolution dual-function catalyst
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  • N-doped carbon-supported base metal oxygen reduction/oxygen evolution dual-function catalyst

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Embodiment 1

[0030] Step 1: Pour 200ml of concentrated sulfuric acid into a beaker, put the beaker in an ice bath and cool it below 4°C, weigh 10g of acetylene black (AB) powder and 5.0g of sodium nitrate into the beaker, and slowly add 10g of it after ultrasonic oscillation for 1 hour Potassium permanganate, turn off the ultrasonic vibration, use mechanical stirring instead, control the temperature not to exceed 10°C, and react for 2 hours, raise the temperature of the water bath to 40°C and react for 0.5 hours. Afterwards, the mixed solution was slowly added into 1000 ml of deionized water, and then the mixed solution was placed in a 95° C. water bath and reacted for 30 minutes under stirring. After the high temperature reaction, add 500 ml of deionized water to stop the reaction, then add 150 ml (30 vol%) of hydrogen peroxide, react for 15 minutes, and then add 300 ml (10 vol%) of hydrochloric acid. The mixture was centrifuged, washed with deionized water several times until neutral, an...

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Abstract

The invention discloses an N-doped carbon-supported base metal oxygen reduction / oxygen evolution dual-function catalyst. The preparation method comprises the steps of taking proper amount of acetylene black to be subjected to strong oxidation treatment, and then attaching the proper amount of manganese chloride on the surface of the acetylene black and implementing heat treatment in the atmosphere of ammonia gases to prepare N-doped acetylene black; and adding the N-doped acetylene black into ethanol-aqueous solution of nickel nitrate, ferric nitrate and urea to implement hydrothermal reaction so as to uniformly and naturally embed nickel and iron hydroxide crystals of lamellar structures into the N-doped acetylene black, thus acquiring the N-doped carbon-supported base metal oxygen reduction / oxygen evolution dual-function catalyst, wherein the N-doped acetylene black plays a role in oxygen reduction and catalysis, and nickel and iron hydroxide crystals play a role in oxygen evolution and catalysis. The catalyst can solve the problem about preparation and compounding of the N-doped carbon material and metal hydroxide respectively used as oxygen reduction and oxygen evolution reaction catalyst, so that the catalyst3 simultaneously is good in catalytic activity and compounding performance, low in cost and prone to produce in large scale.

Description

technical field [0001] The present invention relates to the field of material chemistry, especially to the field of fuel cell catalysts, in particular to an oxygen reduction / oxygen evolution dual-functional catalyst used on the air electrode of a metal-air fuel cell, specifically a nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst / Oxygen evolution bifunctional catalyst. Background technique [0002] The energy supply of human society relies heavily on non-renewable fossil fuels such as oil, coal, and natural gas. However, issues such as the depletion of fossil fuels, global warming, and environmental pollution caused by burning fossil fuels have prompted human society to develop new renewable energy products, as well as energy storage and conversion technologies. Metal-air fuel cells have attracted attention due to their extremely high energy density. Among them, the energy density of the common zinc-air fuel cells and lithium-air fuel cells can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 司玉军
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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