Carbon gel catalyst, its preparation and its application

A catalyst and carbon gel technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the limitations of large-scale industrial production, large proportion of airgel macropores, poor structural adjustability, etc. problems, to achieve the effect suitable for large-scale production, strong catalytic ability, and low product cost

Active Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of novolak resin, the molecular weight is high and the structure adjustability is poor, so the prepared airgel has a large proportion of macropores
[0007] Chinese patent (Application No. 201010210078.8) provides a method for the preparation of metal-doped carbon aerogels. Due to the price of resorcinol, its industrial production is limited.
[0008] Chinese patent (Application No. 200610116392.3) provides a method for preparing nitrogen-containing carbon airgel, but because it needs to be dried under supercritical conditions, the process is cumbersome, and its development...

Method used

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  • Carbon gel catalyst, its preparation and its application
  • Carbon gel catalyst, its preparation and its application
  • Carbon gel catalyst, its preparation and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Dissolve 3.53g of melamine in 4mL of deionized water to form solution A; add dropwise 6.3ml of formaldehyde solution with a mass concentration of 37% to solution A being stirred, stir at 60°C to form transparent solution B, and add to solution B Add ammonia water with a mass concentration of 2.8% dropwise, adjust the pH value to about 8, and continue to stir to obtain solution C. Take 0.4074g of cobalt nitrate solid and add it to the above-mentioned transparent solution C, mix well to obtain solution D; further stir until the reaction forms a gel E; transfer the gel E to a vacuum drying oven for 3 days of vacuum drying and aging treatment at 80°C, take it out and grind it to obtain solid powder F; carbonize the solid powder F at 800°C in a nitrogen atmosphere for 1h, N 2 Gas purged to room temperature, and then at 800 °C NH 3 Nitriding treatment in the atmosphere for 2h, to obtain solid powder G, with 2M HNO 3 The metal was washed out of the solution to obtain solid po...

Embodiment 2

[0057] Dissolve 3.53 g of melamine in 0.224 mol of formaldehyde solution with a mass concentration of 37%, stir at 50°C to form a transparent solution A, add NaOH solution dropwise to solution A, adjust the pH to 9, and continue stirring to obtain solution B , add 0.5656g of ferric nitrate solid to the above transparent solution B, mix well to obtain solution C; further stir until the reaction forms gel D; transfer gel D to a vacuum drying oven for 5 days of vacuum drying and aging treatment at 60°C, take out After crushing and grinding, the solid powder E was obtained; the solid powder E was carbonized in an argon atmosphere at 900°C for 3 hours, and the Ar gas was purged to room temperature, and then NH at 900°C 3 Nitriding treatment in the atmosphere for 5h, to obtain solid powder F, with 0.5M H 2 SO 4 The metal is washed out of the solution to obtain a solid powder G, that is, a melamine-iron-nitrogen carbon xerogel catalyst M-Fe-CN-20.

Embodiment 3

[0059] Dissolve 7.06g of melamine in a 0.448mol mass concentration of 37% formaldehyde solution, stir at 60°C to form a transparent solution A, and add Na 2 CO 3 Aqueous solution, adjust the pH value to 8, and continue to stir to obtain solution B. Take 0.339g of ammonium molybdate solid and add it to the above-mentioned transparent solution B, mix well to obtain solution C; further stir until the reaction forms gel D; transfer gel D Dry and age in a vacuum oven at 85°C for 7d, take it out, crush and grind to obtain solid powder E; carbonize solid powder E at 800°C in a nitrogen atmosphere for 2h, N 2 Gas purged to room temperature, then at 800 °C CH 3 Nitriding treatment in CN atmosphere for 2h, to obtain solid powder F, wash away the metal with 1M HCl solution, to obtain solid powder G, that is, melamine-molybdenum-nitrogen carbon xerogel catalyst M-Mo-CN-23.

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Abstract

The invention discloses a metal-doped nitrogen-containing carbon gel catalyst used for proton exchange membrane fuel cell cathode and its preparation method, a nitrogenous aromatic compound and aldehyde are taken as a reaction precursor, a reaction monomer is subjected to an addition reaction and a condensation polymerization through base catalysis, and a metallic element is simultaneously added to prepare a metal-doped hydrogel, the metal-doped hydrogel is subjected to processes of drying, pyrolysis and secondary nitridation to obtain the metal-doped nitrogen-containing carbon gel nano charcoal material. When the catalyst of the present invention is used as the anode catalyst of the proton exchange membrane fuel cell, the catalyst indicates excellent reduction activity, the catalyst has the advantages of environmental protection, low cost, microscopic control and abundant resource, and is expected to be an electrocatalyst of the proton exchange membrane fuel cell.

Description

technical field [0001] The present invention relates to fuel cells, in particular to fuel cell cathode catalysts. Background technique [0002] A fuel cell is a chemical battery that uses combustible gas or liquid as fuel. The fuel cell can directly convert the chemical energy stored in the fuel and oxidant into electrical energy through an electrochemical reaction, and its reactants - fuel and oxidant can be continuously supplied, and its reaction product - water can be continuously discharged from the battery. Discharge, output electricity and heat at the same time. In fact, the fuel cell conversion process is the reverse process of electrolyzing water to produce hydrogen and oxygen. The fuel cell does not go through the heat engine process, is not limited by the Carnot cycle, and hardly emits nitrogen and sulfur oxides, so it has the advantages of high energy conversion efficiency, high reliability, low pollution, and low noise. [0003] As a kind of fuel cell, proton ...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90H01M4/88
CPCY02E60/50
Inventor 张华民王美日钟和香金虹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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