Method for preparing nitrogen carbon material by using animal waste, and application of nitrogen carbon material as oxygen reduction catalyst
A technology of nitrogen-carbon materials and animal manure, which is applied in the preparation of nitrogen-carbon materials and the field of nitrogen-carbon materials prepared from animal manure, which can solve the problems of lack of resources, high price, and restrictions on the wide application of fuel cells.
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Embodiment 1
[0023] The collected cow dung was naturally air-dried at room temperature, calcined at 700°C for 2 h in a tube furnace under nitrogen protection, and put into a ball mill for 6 h until crushed. Weigh 1 g of sample, add 20 mL of nitric acid solution (2mol / L), stir magnetically for 24 h, wash with deionized water to make it neutral, and dry it in a blower box at 60 °C; then add 5 mL of FeCl 3 / C 2 h 5 OH solution (3mol / L), stirred for 0.5-1 h, dried in a blower box at 60 °C and then ball milled; finally, in a tube furnace, under nitrogen protection, high temperature treatment at 700 °C for 2 h to obtain nitrogen-carbon materials.
[0024] Through the oxygen reduction test, it was found that the nitrogen-carbon material was used as an oxygen reduction catalyst for the electrode of the combustion battery, and the onset potential and half-wave potential of the commercial XC-72 carbon powder oxygen reduction reaction were positively shifted by 30 mV and 34 mV, respectively.
Embodiment 2
[0026] The collected cow dung was naturally air-dried at room temperature, placed in a tube furnace under nitrogen protection, calcined at 800 °C for 2 h, and put into a ball mill for 6 h until crushed. Weigh 1 g of sample, add 50 mL of nitric acid solution (2 mol / L), stir magnetically for 24 h, wash with deionized water to make it neutral, and dry it in a blower box at 60 °C; then add 10 mL of FeCl 3 / C 2 h 5 OH solution (2mol / L), stirred for 0.5-1 h, dried in a blower box at 60 °C and continued to ball mill; finally, in a tube furnace, under nitrogen protection, high temperature treatment at 800 °C for 2 h to obtain nitrogen-carbon materials.
[0027] Through the oxygen reduction test, it was found that the nitrogen-carbon material was used as an oxygen reduction catalyst for the electrode of the combustion battery, and the onset potential and half-wave potential of the commercial XC-72 carbon powder oxygen reduction reaction were positively shifted by 96 mV and 88 mV, resp...
Embodiment 3
[0029] The collected cow dung was naturally air-dried at room temperature, placed in a tube furnace under nitrogen protection, calcined at 900 °C for 2 h, and put into a ball mill for 6 h to pulverize. Weigh 1 g of sample, add 100 mL of nitric acid solution (1mol / L), stir magnetically for 24 h, wash with deionized water to make it neutral, and dry it in a blower box at 60 °C; then add 40 mL of FeCl 3 / C 2 h 5 OH solution (0.5 mol / L), stirred for 0.5-1 h, dried in a blower box at 60 °C and continued to ball mill; finally, in a tube furnace, under nitrogen protection, high temperature treatment at 900 °C for 2 h to obtain nitrogen-carbon materials.
[0030] Through the oxygen reduction test, it was found that the nitrogen-carbon material was used as an oxygen reduction catalyst for the electrode of the combustion battery, and the onset potential and half-wave potential of the commercial XC-72 carbon powder oxygen reduction reaction were positively shifted by 46 mV and 58 mV, re...
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