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Fe-N-C catalyst with waste shaddock peel as carbon source, and preparation method and application thereof

A pomelo peel and catalyst technology, applied in the field of new catalytic materials, can solve the problems of complex process, harsh reaction conditions, increased catalyst cost, etc., and achieve the effects of low production cost, low equipment requirements, and excellent oxygen reduction electrocatalytic performance.

Inactive Publication Date: 2019-04-12
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, the current methods for preparing transitional Fe-N-C catalysts have problems such as complex process and harsh reaction conditions, especially the use of carbon supports in the precursors, which greatly increases the cost of catalyst preparation

Method used

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  • Fe-N-C catalyst with waste shaddock peel as carbon source, and preparation method and application thereof
  • Fe-N-C catalyst with waste shaddock peel as carbon source, and preparation method and application thereof
  • Fe-N-C catalyst with waste shaddock peel as carbon source, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In this embodiment, ferric chloride is used as iron salt to prepare Fe-N-C catalyst, and the following operations are carried out in sequence:

[0035] (1) After cleaning the inner and outer surfaces of pomelo peels, crush them with a fruit juice machine, and dry them at 50° C. for 24 hours to obtain dried pomelo peels. Mix 1g of dried pomelo peel and 1g of ferric chloride, add appropriate amount of water and stir into a slurry. The mixed slurry was dried at 100° C. for 16 h, scraped and ground to obtain a mixed powder.

[0036] (2) Mix the powder obtained in step 1 in NH 3 High-temperature calcination in a tube furnace under atmosphere, the calcination temperature is 700°C, and the heating rate is 7°C / min. After calcination for 2 hours, it was naturally cooled to room temperature to obtain a black powder.

[0037] (3) Put into 30mL of hydrochloric acid with a substance concentration of 1mol / L, stir for one and a half hours, let stand for 2 days, filter and dry to ob...

Embodiment 2

[0040] In this embodiment, iron nitrate is used as iron salt to prepare Fe-N-C catalyst, and the following operations are carried out in sequence:

[0041] (1) After cleaning the inner and outer surfaces of pomelo peels, crush them with a fruit juice machine, and dry them at 50° C. for 24 hours to obtain dried pomelo peels. Mix 2g of dried pomelo peel and 1g of ferric nitrate, add appropriate amount of water and stir into a slurry. The mixed slurry was dried at 140° C. for 12 hours, scraped and ground to obtain a mixed powder.

[0042] (2) Mix the powder obtained in step 1 in NH 3High-temperature calcination in a tube furnace under atmosphere, the calcination temperature is 800°C, and the heating rate is 8°C / min. After calcination for 3 hours, it was naturally cooled to room temperature to obtain a black powder.

[0043] (3) Put into 30mL of hydrochloric acid with a substance concentration of 2mol / L, stir for one and a half hours, let stand for 2 days, filter and dry to obt...

Embodiment 3

[0046] In this embodiment, iron nitrate is used as iron salt to prepare Fe-N-C catalyst, and the following operations are carried out in sequence:

[0047] (1) After cleaning the inner and outer surfaces of pomelo peels, crush them with a fruit juice machine, and dry them at 100° C. for 12 hours to obtain dried pomelo peels. Mix 6g of dried pomelo peel, 1g of ferric nitrate and 1g of ferric chloride, add appropriate amount of water and stir into a slurry. The mixed slurry was dried at 90° C. for 24 h, scraped off and ground to obtain a mixed powder.

[0048] (2) Mix the powder obtained in step 1 in NH 3 High-temperature calcination in a tube furnace under atmosphere, the calcination temperature is 900°C, and the heating rate is 6°C / min. After calcination for 1 h, it was naturally cooled to room temperature to obtain a black powder.

[0049] (3) Put into 30mL of hydrochloric acid with a substance concentration of 0.5mol / L, stir for one and a half hours, let stand for 2 days,...

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Abstract

The invention relates to the field of novel catalytic materials, specifically to a preparation method for an Fe-N-C catalyst with waste shaddock peel as a carbon source. The preparation method comprises the following steps: S1, smashing the shaddock peel, and carrying out pretreatment so as to obtain dried shaddock peel; adding the dried shaddock peel and iron salt into deionized water, and carrying out stirring, drying and grinding so as to obtain mixed powder; and S2, calcining the mixed powder obtained in the step S1 in an ammonia gas atmosphere, and after completion of calcination, carrying out acid treatment so as to obtain the Fe-N-C catalyst. The method provided by the invention does not need to use a high-cost carbon material as a precursor, uses the shaddock peel as the carbon source, forms the Fe-N-C catalyst and pyrolyzes the shaddock peel into a mesoporous carbon material at the same time, and is a method for in-situ generation of a carbon carrier; the waste shaddock peel realizes cyclic utilization; and the Fe-N-C catalyst obtained by using the preparation method provided by the invention has the advantages of large specific surface area, high porosity, a large numberof mesopores, high purity and more excellent oxygen-reduction electrocatalytic performance.

Description

technical field [0001] The invention relates to the field of novel catalytic materials, in particular to a preparation method of an Fe-N-C catalyst using waste pomelo peels as a carbon source. Background technique [0002] Iron nitrogen carbon (Fe-N-C) catalyst is a new type of carbon-based nanomaterials, and its general structure is: carbon as the substrate material of the catalyst mainly exists in the form of graphitized carbon materials; Fe-N X The active sites as catalysts are incorporated into the six-element grid of graphitic carbon, replacing part of the carbon. Due to Fe-N X Due to the special electronic structure, Fe-N-C catalysts have shown excellent catalytic performance in many fields. Fe-N-C catalysts were first discovered and applied in the field of fuel cell cathode oxygen reduction electrocatalysis. Jahnke et al [Jahnke H.G., Schonborn M., Zimmerman G.Transition metal chelates as catalysts for fuel cell reactions[J].Journal of The Electrochemical Society,1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/88H01M4/90
CPCH01M4/8825H01M4/9041H01M4/9083B01J27/24B01J35/33B01J35/647B01J35/615Y02E60/50
Inventor 钟国玉林俊宁李嘉辉许书瑞刘铧滨傅小波孙成华徐勇军
Owner DONGGUAN UNIV OF TECH
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