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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.

Inactive Publication Date: 2014-03-05
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, carbon-supported platinum and platinum alloys are widely used as oxygen reduction catalysts for low-temperature fuel cells due to their superior catalytic activity and stability, but the noble metal platinum is seriously restricted due to its high price and lack of resources.

Method used

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  • Method for preparing nitrogen carbon material by using animal waste, and application of nitrogen carbon material as oxygen reduction catalyst
  • Method for preparing nitrogen carbon material by using animal waste, and application of nitrogen carbon material as oxygen reduction catalyst
  • Method for preparing nitrogen carbon material by using animal waste, and application of nitrogen carbon material as oxygen reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention provides a method for preparing a nitrogen carbon material by using animal waste, and belongs to the technical field of a novel material. The method comprises the following steps: by taking the animal waste as a raw material, carrying out primary carbonization treatment under protection of nitrogen after naturally airing, so as to obtain a carbon material; crushing the carbon material to be added in a salpeter solution; carrying out activating treatment for 20-24 hours under agitation; washing into a neutral state by using deionized water, baking, and then adding to an FeCl3 / C2H5OH solution to agitate for 0.5-1 hour; further carrying out ball milling after directly drying; finally, carrying out secondary carbonization treatment under protection of nitrogen, so as to obtain the nitrogen carbon material. The material is high in nitrogen content, and displays better oxygen reduction performance when being applied to oxygen reduction reaction of a fuel cell as the oxygen reduction catalyst. Therefore, the nitrogen carbon material can be applied to the oxygen reduction reaction of the fuel cell as the oxygen reduction catalyst.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a method for preparing a nitrogen-carbon material, in particular to a method for preparing a nitrogen-carbon material by using animal feces; the invention also relates to the application of the nitrogen-carbon material as an oxygen reduction catalyst in a fuel cell . Background technique [0002] Facing the increasingly serious energy crisis and environmental pollution problems, countries all over the world are devoting themselves to the research of green and sustainable energy systems. As a power generation device that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction, the fuel cell has outstanding advantages such as environmental friendliness, simple structure, and high energy conversion rate, and can effectively solve the current energy shortage and environmental pollution. And other issues, which have been extens...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01M4/90C01B32/205
CPCY02E60/50
Inventor 王荣方张争马妍姣王辉季山
Owner NORTHWEST NORMAL UNIVERSITY
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