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Biomass carbon catalyst and preparation method and application thereof

A carbon-based catalyst, biomass carbon technology, used in electrical components, battery electrodes, circuits, etc., to ensure activity and stability, good application effect, and high specific surface area.

Inactive Publication Date: 2016-03-02
SHENYANG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochar has well-developed pore structure, high environmental stability, and good electrical conductivity. The carbon material itself has no activity for oxygen reduction reaction. The reduction reaction produces catalytic activity, and it is feasible to prepare carbon-based catalysts with biomass precursors, but the research in this area is still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 10g of corn stalks were crushed and sieved with 0.5M H 2 SO 4 After the solution was cleaned and dried to obtain biomass powder, the powder was added to 10ml of deionized water, stirred and mixed for 4 hours to obtain a uniform mixed solution A, 0.33M cobalt chloride was added to the above mixed solution A, stirred and impregnated evenly to obtain Mix the slurry B, keep stirring the mixed slurry B at 20°C for 4 hours, then put it into a vacuum drying oven to dry for 2 days, take it out, pulverize and grind to obtain a solid powder C, and dissolve the solid powder C in NH 3 Carbonitriding treatment at 800°C for 3h, N 2 Gas purged to room temperature, 0.5MH 2 SO 4 The solution was washed to remove metal salts, and after drying, a biomass carbon-based catalyst Co-B-30 with a molar ratio of cobalt chloride to biomass mass of 1:30 was obtained.

Embodiment 2

[0035] 10g of peanut stalks were crushed and sieved, and mixed with 0.5M H 2 SO 4 After the solution was cleaned and dried to obtain biomass powder, add the powder to 8ml deionized water, stir and mix for 4 hours to obtain a uniform mixed solution A, add 0.5M ferric nitrate to the above mixed solution A, stir and impregnate evenly to obtain a mixed solution Slurry B and mixed slurry B were continuously stirred at 25°C for 4 hours, then put into a vacuum drying oven to dry for 2 days, and then pulverized and ground to obtain solid powder C, which was carbonitrided in an acetonitrile atmosphere at 700°C Treatment 3h, N 2 Gas purged to room temperature, 0.5MH 2 SO 4 The solution was washed to remove metal salts, and dried to obtain a biomass carbon-based catalyst Fe-B-20 with a molar ratio of iron nitrate to biomass of 1:20.

Embodiment 3

[0037] Crush 10g of peanut straw and sieve it with 1M H 2 SO 4 After cleaning and drying the solution to obtain biomass powder, add the powder into 15ml deionized water, stir and mix for 2 hours to obtain a uniform mixed solution A, add 0.2M cobalt nitrate to the above mixed solution A, stir and impregnate evenly to obtain a mixed solution Slurry B and mixed slurry B were continuously stirred at 20°C for 4 hours, then put into a vacuum drying oven to dry for 1d, and then pulverized and ground to obtain solid powder C, which was dissolved in NH 3 Carbonitriding treatment at 1000°C for 3 hours in the atmosphere, N 2 Gas purged to room temperature, 1MH 2 SO 4 The solution was washed to remove metal salts, and after drying, a biomass carbon-based catalyst Co-B-50 with a molar ratio of cobalt nitrate to biomass mass of 1:50 was obtained.

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Abstract

The invention discloses a biomass carbon catalyst and a preparation method and application thereof. The precursor of the catalyst comprises biomass and metal salts, wherein the biomass includes one or more of maize straw, corncob, rice straw, cotton straw, peanut straw, peanut shell, wheat hull, rice hull, wood, sawdust, bamboo wood and weed. Through controlling addition of metal salts in different amounts, adjusting impregnation concentration of the precursor and reaction ambient and carbonization and nitriding treatment temperatures, the biomass carbon catalyst with controllable and adjustable pore structure and specific surface area can be prepared. When used as a fuel battery cathode catalyst, the biomass carbon catalyst shows excellent oxygen reduction reaction activity and stability. The preparation process is simple in flow, short in period and free of environment, provides a novel high-value-added resource recycling way for waste biomass and has dual effects of biomass disposal and energy and power generation.

Description

technical field [0001] The invention relates to a fuel cell catalyst, in particular to a high-activity biomass carbon-based catalyst, a preparation method and an application in a fuel cell cathode. Background technique [0002] A fuel cell is an energy conversion device that directly converts chemical energy stored in fuel into electrical energy. The fuel cell does not go through the heat engine process, 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 reaction products are harmless substances such as water, and hardly produce pollutants such as sulfur dioxide, nitrogen oxides, and suspended solids, and do not emit greenhouse gas carbon dioxide, which is in line with the concept of environmental protection in today's society. Fuel cells require less auxiliary equipment, are conven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 金虹李金洋刘庆玉陈富于
Owner SHENYANG AGRI UNIV
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