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Preparation method of non noble metal catalyst for cathodic oxygen reduction reaction of fuel cell

A fuel cell cathode, non-precious metal technology, applied in the field of non-precious metal catalyst preparation, can solve the problems of slow reaction speed, restricting the commercialization process of fuel cells, high price, etc., and achieves low cost, strong anti-poisoning ability and stability. Good results

Inactive Publication Date: 2012-10-03
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of fuel cell cathode oxygen reduction catalyst has always been the main bottleneck of fuel cell technology, because the reaction speed of the cathode oxygen reduction process is slow, and the current platinum catalyst commonly used is expensive and other problems restrict the commercialization process of the entire fuel cell
Although people have made great efforts, the poisoning and cost problems of using noble metal catalysts cannot be fundamentally solved

Method used

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  • Preparation method of non noble metal catalyst for cathodic oxygen reduction reaction of fuel cell
  • Preparation method of non noble metal catalyst for cathodic oxygen reduction reaction of fuel cell
  • Preparation method of non noble metal catalyst for cathodic oxygen reduction reaction of fuel cell

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Experimental program
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Effect test

Embodiment 1

[0028] Add 40 ml methanol to a 100 mL flask, then add 3.2 g bipyridine, 0.5 g carbon nanotubes, ultrasonically disperse and stir for half an hour; add 0.5 g nickel nitrate solid and stir vigorously for about 2 hours, then steam on a rotary evaporator After drying, dry it in an oven and fully grind; then place it in a tube furnace with nitrogen, heat treatment at 600 ℃ for 2 hours, take it out, grind it, add it to a 0.5 M sulfuric acid solution, and treat it at 60 ℃ For 12 hours, filter with suction, wash with water, and dry to obtain a non-precious metal catalyst.

[0029] Compared with commercial platinum-carbon catalysts, non-precious metal catalysts have a 30 mV increase in half-potential. Under -0.2 V, the ratio of initial current to current after 20,000 s is 19% higher than that of commercial platinum-carbon catalysts.

Embodiment 2

[0031] Add 60 ml of methanol to a 100 mL flask, then add 2.2 g of bipyridine and 0.4 g of carbon nanotubes, ultrasonically disperse and stir for half an hour; add 0.5 g of nickel chloride solid, stir vigorously for 3 hours, and place on a rotary evaporator After evaporating the solvent, dry it in an oven and grind it thoroughly; then place it in a tube furnace, blow in nitrogen, heat-treat it at 650 ℃ for 1 hour, take it out, and grind; add it to a 0.5 M hydrochloric acid solution at 60 ℃ After treatment for 8 hours, suction filtration, water washing, and drying, a non-precious metal catalyst is obtained.

[0032] Compared with commercial platinum-carbon catalysts, non-noble metal catalysts have a 23 mV increase in half-potential. Under the condition of -0.2 V, the ratio of initial current to current after 20000 s is 17% higher than that of commercial platinum-carbon catalysts.

Embodiment 3

[0034] Add 60 ml of methanol to a 100 mL flask, then add 2.7 g of bipyridine, 0.3 g of carbon nanotubes, ultrasonically disperse and stir for half an hour, add 0.5 g of cobalt nitrate solid, stir vigorously for about 3.5 hours, and then evaporate After the instrument is evaporated to dryness, it is dried in an oven and fully ground; then it is placed in a tube furnace with nitrogen gas, heat treated at 750 ℃ ​​for 4 hours, taken out, ground, and added to a 2 M nitric acid solution. Treated at 80°C for 16 hours, filtered with suction, washed with water, and dried to obtain a non-precious metal catalyst.

[0035] Compared with commercial platinum-carbon catalysts, non-noble metal catalysts have an increase of 38 mV in half-potential. Under the condition of -0.2 V, the ratio of initial current to current after 20000 s is 12% higher than that of commercial platinum-carbon catalysts.

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Abstract

The invention provides a preparation method of a non noble metal catalyst for cathodic oxygen reduction reaction of a fuel cell and belongs to the technical field of electrode catalytic materials. The preparation method comprises the steps as follows: in a protonic solvent, mixing dipyridine with a carbon nanotube according to a mass ratio of (20 to 1) to (1 to 1), ultrasonically dispersing and stirring for 20 to 50 min respectively, adding metal salt which is 1 to 20 times the carbon nanotube in mass, strongly stirring for 1 to 5 h, evaporating to removal the solvent, drying, grinding, placing into a tubular furnace, adding nitrogen for heat treatment, grinding, then treating with an acid solution, carrying out suction filtration, washing and drying so as to obtain the non noble metal catalyst. The non noble metal catalyst prepared by the preparation method has the advantages of low cost, high activity, high poisoning resistance and good stability in comparison with the traditional noble metal catalyst, and is an ideal catalyst for the cathodic oxygen reduction reaction of the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a non-precious metal fuel cell catalyst and its preparation, in particular to a preparation method of a non-precious metal catalyst used for fuel cell cathode oxygen reduction reaction. Background technique [0002] A fuel cell is a power generating device that converts chemical energy in fuel into electrical energy. Fuel cells have attracted great attention due to their high efficiency in providing energy, low emissions, safe and convenient storage and transportation, low noise, normal temperature use, convenient fuel carrying and replenishment, and no mechanical vibration. The problem of fuel cell cathode oxygen reduction catalyst has always been the main bottleneck of fuel cell technology, because the reaction speed of the oxygen reduction process of the cathode is slow, and the currently commonly used platinum catalyst is expensive and other problems restrict the commerciali...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/75B01J23/755H01M4/90
CPCY02E60/50
Inventor 王荣方王伟王辉马妍姣
Owner NORTHWEST NORMAL UNIVERSITY
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