Preparation method and application of iron carbide-cobalt/nitrogen doped carbon nano composite material

A nano-composite material and nitrogen-doped carbon technology, applied in structural parts, electrolytic components, electrolytic processes, etc., to achieve excellent catalytic performance, excellent electrical conductivity, and large specific surface area

Active Publication Date: 2018-12-18
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it has been reported in the literature that the combination of transition metals (such as Fe and Co) with nitrogen-doped carbon materials can increase catalytic activity, but it is limited to a single or two reactions, and has high catalytic activity for multiple reactions at the same time. There are reports

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  • Preparation method and application of iron carbide-cobalt/nitrogen doped carbon nano composite material
  • Preparation method and application of iron carbide-cobalt/nitrogen doped carbon nano composite material
  • Preparation method and application of iron carbide-cobalt/nitrogen doped carbon nano composite material

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Embodiment

[0050] The preparation process and steps in this embodiment are as follows:

[0051] (1) Add 6g of P123, polyethylene oxide-propylene oxide-ethylene oxide and 14.5ml concentration of 37% concentrated hydrochloric acid into 217ml deionized water, then add 7.4ml of n-butanol, at 35°C Stirred under low temperature for 1h, then added 13.8ml of tetraethyl orthosilicate dropwise, and continued to stir at 35°C for 24h; then transferred it to a polytetrafluoroethylene reactor, and reacted at 100°C for 24h; then The reacted solution was centrifuged with water and ethanol, washed, and vacuum-dried at 60°C for 24 hours; finally, the obtained white powder was annealed in air at 500°C for 3 hours, and then naturally cooled to room temperature;

[0052] (2) 0.118g Co(NO 3 ) 2 ·6H 2 O, 0.382g Fe(NO 3 ) 3 9H 2 O, the melamine of 5.44g, the mesoporous KIT-6 silicon template that 1g makes and the P123 of 2.8g join in the mixed solution of 28ml water and ethanol, carry out the stirring of ...

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Abstract

The invention relates to a preparation method and application of an iron carbide-cobalt/nitrogen doped carbon nano composite material. The preparation method specifically comprises the following stepsthat a, a mesoporous ordered KIT-6 silicon template is constructed; b, Co(NO3)2.6H2O and Fe(NO3)3.9H2O, melamine and P123 are injected into holes of the KIT-6 template; c, the mixture is subjected toannealing in an N2 environment to decompose Co(NO3)2.6H2O and Fe(NO3)3.9H2O to be subjected to a chemical reaction with carbon obtained by pyrolyzing the P123 and the melamine; and d, a product afterheat-treating is corroded with a NaOH solution. The obtained Fe3C-Co/NC composite material has a large specific surface area and quite good electrical conductivity and has quite good catalytic performance for oxygen reduction and electrolysis of water reaction of negative electrodes of alkaline fuel cells, and a new idea for rational design and construction of a multifunctional electrocatalyst isprovided.

Description

Technical field: [0001] The invention relates to a preparation method of an iron carbide-cobalt / nitrogen-doped carbon nanocomposite material and its application in the oxygen reduction reaction of the fuel cell negative electrode and in the electrolysis of water. Background technique: [0002] The increasingly severe energy crisis and environmental pollution have prompted people to search for and develop cheap, efficient, and clean energy storage and conversion technologies to meet the huge demand for energy in transportation vehicles and power generation equipment. Electrocatalytic reactions, such as oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), etc., play a vital role in energy systems such as fuel cells and rechargeable metal-air batteries. Therefore, how to develop efficient and cheap ORR, OER, HER catalysts has always been a hot issue in the field of catalytic materials. In order to enable the above reactions to pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04H01M4/86H01M4/96
CPCC25B1/04C25B11/091H01M4/8647H01M4/96Y02E60/36Y02E60/50
Inventor 杨春成宰世锋杜丽文子赵明蒋青
Owner JILIN UNIV
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