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A kind of carbon gel catalyst and its application

A catalyst, carbon gel technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low activity and poor stability, and achieve high catalytic activity, high stability, high catalytic activity. The effect of specific surface area

Active Publication Date: 2011-12-28
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

The carbon material itself has no activity for the oxygen reduction reaction, but by improving the structure, composition, and surface functional groups of the carbon material through doping and modification methods, the carbon material itself can be catalytically active for the oxygen reduction reaction, but the activity is low and the stability is poor.

Method used

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  • A kind of carbon gel catalyst and its application
  • A kind of carbon gel catalyst and its application
  • A kind of carbon gel catalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 6.16g of resorcinol in 7mL of deionized water to form a transparent solution A; take 0.4355g of cobalt acetate tetrahydrate solid and add it to the above transparent solution A while stirring, and mix well to obtain solution B; Add dropwise 9.08g of formaldehyde solution with a mass concentration of 37%, stir and mix evenly, add dropwise 3mL of ammonia water with a mass concentration of 28% in an environment of 20°C and continue to seal and stir, the reaction forms a gel C; transfer the gel C to a vacuum Vacuum drying and aging treatment at 60°C in a drying oven for 3 days, crushing and grinding after taking out to obtain solid powder D; carbonitriding treatment of solid powder D at 900°C in an acetonitrile atmosphere for 1 hour, N 2 Gas purged to room temperature, 2M HNO 3 The solution was washed to remove metal salts to obtain a carbon xerogel catalyst Co-CN-32 with a molar ratio of resorcinol and cobalt acetate of 32:1.

Embodiment 2

[0040] Dissolve 6.16g of resorcinol in 7mL of deionized water to form a transparent solution A; weigh 0.8149g of cobalt nitrate hexahydrate and add it into the above-mentioned transparent solution A while stirring, mix and dissolve evenly to obtain a solution B; 9.08g of formaldehyde solution with a mass concentration of 37% was added dropwise to the mixture, further stirred and mixed evenly, and 7mL of ammonia water with a mass concentration of 20% was added dropwise at the same time in an environment of 20°C and continuously sealed and stirred, and the reaction formed gel C; C was dried and aged in supercritical CO2 for 7d, and after taking it out, it was pulverized and ground to obtain solid powder D; 3 Carbonitriding treatment at 800°C for 3h, N 2 Gas purged to room temperature, 0.5M H 2 SO 4 The solution was washed to remove metal salts to obtain a carbon airgel catalyst Co-CN-20 with a molar ratio of resorcinol and cobalt nitrate of 20:1.

[0041] image 3 It can be ...

Embodiment 3

[0043] Dissolve 6.16g of resorcinol in 2mL of deionized water to form a transparent solution A; take 0.7063g of ferric nitrate nonahydrate solid and add it to the above transparent solution A while stirring, mix and dissolve evenly to obtain solution B; Add dropwise 9.08g of formaldehyde solution with a mass concentration of 37% in the solution, further stir and mix evenly, continue stirring in an environment of 90°C, and form gel C after 3 hours of reaction; transfer gel C to a vacuum drying oven for vacuum drying at 80°C Aging treatment for 3d, crushing and grinding after taking out to obtain solid powder D; solid powder D in NH 3 Carbonitriding treatment at 700°C for 5 hours, purged with Ar gas to room temperature, 4M HNO 3 The solution was washed to remove metal salts to obtain a carbon xerogel catalyst Fe-CN-32 with a molar ratio of resorcinol and iron nitrate of 32:1.

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Abstract

The invention relates to a fuel battery catalyst, and in particular relates to application of a carbon gel catalyst in a fuel battery. According to the invention, the precursor components of the catalyst consist of resorcinol, formaldehyde and a metal salt, wherein the metal salt comprises soluble nitrates, carbonates, sulfates, acetates or halides of one or more metal elements in IVB, VB, VIB, VIIB, VIII, IB and IIB groups; in the precursor, the molar ratio of resorcinol to formaldehyde is 2:1, and the molar ratio of resorcinol to the metal salt is (5:1)-(1500:1); and the precursor is mixed with organic gel and then carbonized and nitrogenized at the ammonia environment of 500-1200 DEG C so as to prepare the high-activity carbon gel catalyst. According to the invention, as a non-metal catalyst, the carbon gel catalyst shows good oxygen reduction activity and good electrochemical stability when being used as a fuel battery negative electrode catalyst.

Description

technical field [0001] The invention relates to a fuel cell catalyst, in particular to the application of a high active carbon gel catalyst in a fuel cell cathode. Background technique [0002] A fuel cell is an energy conversion device that directly converts the chemical energy of a substance into electrical energy. The fuel cell does not work in the form of a heat engine, and the power generation process is not limited by the Carnot cycle. Most of the chemical energy of the fuel can be directly converted into electrical energy, and the energy conversion efficiency can reach 40-60%. At the same time, the fuel cell power generation process hardly produces harmful substances such as sulfur dioxide, nitrogen oxides, and suspended solids, and does not emit greenhouse gas carbon dioxide, which is in line with the environmental protection concept of today's society. At the same time, the fuel cell requires less auxiliary equipment, saves a large number of power lines, and is eas...

Claims

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Application Information

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IPC IPC(8): B01J27/24H01M4/90
CPCY02E60/50
Inventor 张华民金虹钟和香徐婷马原蔚许壮
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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