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Production method and application of iron-nitrogen co-doped carbon catalyst used for electrocatalytic reduction of CO2

A carbon-based catalyst and co-doping technology, applied in the field of electrocatalysis, can solve the problem of difficult activation of carbon materials and achieve the effect of increasing the degree of defects

Active Publication Date: 2019-12-06
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon-based non-metallic catalysts have attracted extensive attention due to their abundant resources, strong electrical conductivity, large specific surface area, green and pollution-free, etc., but carbon materials are not easy to activate CO 2

Method used

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  • Production method and application of iron-nitrogen co-doped carbon catalyst used for electrocatalytic reduction of CO2
  • Production method and application of iron-nitrogen co-doped carbon catalyst used for electrocatalytic reduction of CO2
  • Production method and application of iron-nitrogen co-doped carbon catalyst used for electrocatalytic reduction of CO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Electrocatalytic reduction of CO in this example 2 The preparation method of the iron-nitrogen co-doped carbon catalyst, the steps are as follows:

[0026] (1) Dissolve 2.7029 g ferric chloride hexahydrate and 3.03 g urea in 120 ml deionized water, stir for 0.5 h to fully dissolve; add 0.4 ml aniline, stir for 1 h; add, then add 0.9128 g APS, stir for 0.5 h; put the solution in an autoclave and react at 120°C for 4 hours; after the reaction is completed, the product is washed with deionized water and anhydrous ethanol in turn to neutrality, and placed in a 60°C oven after completion , and dried for 12 h to obtain the precursor FeOOH / PANI-0.4.

[0027] (2) Put the FeOOH / PANI-0.4 precursor into a tube furnace, N 2 environment, at 5℃·min -1 The Fe / N-C sample was heated to 800 °C at a rate of 100 °C, kept at this temperature for 2 h, and then naturally cooled to room temperature to obtain the Fe / N-C sample; the Fe / N-C sample was pickled at 80 °C in a 2M aqueous sulfuric ...

Embodiment 2

[0029] Electrocatalytic reduction of CO in this example 2 The preparation method of the iron-nitrogen co-doped carbon catalyst, the steps are as follows:

[0030] (1) Dissolve 2.7029 g ferric chloride hexahydrate and 3.03 g urea in 120 ml deionized water, stir for 0.5 h to fully dissolve; add 0.5 ml aniline, stir for 1 h; then add 1.141 g APS, stir for 0.5 h; The solution was placed in an autoclave and reacted at 120 °C for 4 h; after the reaction was completed, the product was washed with deionized water and anhydrous ethanol in turn until neutral, and then placed in a 60 °C oven for drying. After 12 h, the precursor FeOOH / PANI-0.5 was obtained.

[0031] (2) Put FeOOH / PANI-0.5 precursor into a tube furnace, N 2 environment, at 5℃·min -1The temperature was raised to 800°C at a high rate, and kept at this temperature for 2h, and then cooled down to room temperature naturally to obtain the sample Fe / N-C; the Fe / N-C sample was acid-washed in 2M sulfuric acid aqueous solution a...

Embodiment 3

[0033] The present embodiment is used for electrocatalytic reduction of CO 2 The preparation method of the iron-nitrogen co-doped carbon catalyst, the steps are as follows:

[0034] (1) Dissolve 2.7029 g ferric chloride hexahydrate and 3.03 g urea in 120 ml deionized water, stir for 0.5 h to fully dissolve; add 0.6 ml aniline, stir for 1 h; then add 1.369 g APS, stir for 0.5 h; Place the solution in a high-pressure reactor and react at 120°C for 4 h; after the reaction is complete, wash the product with deionized water and absolute ethanol in turn until neutral, then put it in an oven at 60°C and dry it After 12 h, the precursor FeOOH / PANI-0.6 was obtained.

[0035] (2) Put the FeOOH / PANI-0.6 precursor into the tube furnace, N 2 Under ambient conditions, at 5°C·min -1 The temperature was raised to 800°C at a high rate, and kept at this temperature for 2h, and then cooled down to room temperature naturally to obtain the sample Fe / N-C; the Fe / N-C sample was acid-washed in 2M ...

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Abstract

The invention discloses a production method and application of a doped carbon catalyst used for electrocatalytic reduction of CO2. The carbon-based catalyst is doped with iron and nitrogen atoms, andcontains intrinsic carbon defects. Production of the doped carbon-based catalyst used for electrocatalytic reduction of the CO2 comprises the following steps: (1) dissolving an iron salt and urea in deionized water under stirring; (2) adding aniline into a metal salt solution, and conducting stirring for 1 h; (3) adding ammonium persulfate, and then conducting stirring for 0.5 h; (4) transferringan obtained mixed solution into a hydrothermal reactor, and carrying out a reaction; (5) conducting centrifugation on obtained suspension, cleaning the suspension subjected to centrifugation until thesuspension is neutral, and conducting drying to obtain a FeOOH / PANI precursor; and (6) calcining the obtained precursor in an inert gas atmosphere, then conducting acid pickling, and conducting calcining again to obtain the carbon-based catalyst. The production method is low in cost, simple and easy to control, and the catalyst is high in selectivity and good in catalytic activity in an electrocatalytic reduction process of the CO2.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a method for electrocatalytic reduction of CO 2 The iron-nitrogen co-doped carbon catalyst and its preparation method and application. Background technique [0002] Extensive use of fossil energy leads to CO 2 Atmospheric levels have risen sharply, CO 2 As the most important greenhouse gas, its continuous growth will bring a series of environmental problems, such as: climate warming, water acidification, glaciers melting, sea level rise, etc., and then threaten the normal life of human beings, how to slow down and use CO 2 It is an urgent problem to be solved. [0003] Electrocatalytic reduction of CO 2 Using electric energy as a driving force, which can be obtained from wind energy, tidal energy, geothermal energy and nuclear energy, has attracted people's attention due to its mild and controllable reaction conditions, green and pollution-free reaction process, and ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C25B1/00C25B11/06
CPCB01J27/24C25B1/00C25B11/075B01J35/33B01J35/617B01J35/635B01J35/647
Inventor 吴诗德平丹吕熙宁张桂伟王诗文杨许召方少明
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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