Method for adjusting nitrogen content in carbon-nitrogen based monatomic ferrous catalyst
An iron catalyst, nitrogen-based single technology, applied in electrical components, battery electrodes, circuits, etc., can solve problems such as catalyst activity reduction, and achieve the effect of simple and effective preparation process
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Embodiment 1
[0038] Dissolve 0.04mol 2-aminopyrimidine in 10mL ethanol (95%) solution to form a transparent solution A; add 0.003mol ferric chloride hexahydrate to the transparent solution A, and stir vigorously at room temperature (20-25°C) for 12 -24h; place the mixture in a vacuum drying oven (80-100°C) and dry (2-4h); place the dried mixture in a tube furnace, and pyrolyze it for 2-4h under a nitrogen atmosphere (heating rate 5°C / min, heated to 1000°C), cooled to room temperature to obtain a black solid; use sulfuric acid or hydrochloric acid (2-6mol / L, 80mL) to acidify the obtained black solid at 80-100°C for 12-24h to remove the material Medium-active metal iron and its oxides; then centrifuge and wash the acid-washed material (until the pH value of the lotion reaches 7) and dry (8-12h) in a vacuum drying oven (80-100°C); The dried product is subjected to secondary high-temperature pyrolysis for 2-4h (the temperature rise rate is 5°C / min, and the temperature is raised to 1000°C), and...
Embodiment 2
[0040]Dissolve 0.04mol N-methylimidazole in 10mL ethanol (95%) solution to form a transparent solution A; add 0.003mol ferric chloride hexahydrate to the transparent solution A, and stir vigorously at room temperature (20-25°C) 12-24h; place the mixture in a vacuum drying oven (80-100°C) and dry (2-4h); place the dried mixture in a tube furnace, and pyrolyze it for 2-4h under a nitrogen atmosphere (heating The rate is 5°C / min, the temperature is raised to 1000°C), cooled to room temperature to obtain a black solid; acidify the obtained black solid with sulfuric acid or hydrochloric acid (2-6mol / L, 80mL) at 80-100°C for 12-24h to remove The active metal iron and its oxides in the material; then the acid-washed material is centrifuged, washed (until the pH value of the washing liquid reaches 7) and dried in a vacuum drying oven (80-100°C) (8-12h) The dried product is subjected to secondary high-temperature pyrolysis for 2-4h (the heating rate is 5° C. / min, and the temperature is...
Embodiment 3
[0042] Dissolve 0.04mol 2-benzimidazolyl acetonitrile in 10mL ethanol (95%) solution to form a transparent solution A; Stir vigorously for 12-24h; place the mixture in a vacuum oven (80-100°C) and dry (2-4h); place the dried mixture in a tube furnace, and pyrolyze it for 2-4h under a nitrogen atmosphere (The heating rate is 5°C / min, the temperature is raised to 1000°C), cooled to room temperature to obtain a black solid; use sulfuric acid or hydrochloric acid (2-6mol / L, 80mL) to acidify the obtained black solid at 80-100°C for 12-24h To remove the active metal iron and its oxides in the material; then centrifuge and wash the acid-washed material (until the pH value of the washing liquid reaches 7) and dry it in a vacuum drying oven (80-100°C) (8- 12h); the dried product is subjected to secondary high-temperature pyrolysis for 2-4h (heating rate is 5°C / min, and the temperature is raised to 1000°C), cooled to room temperature, and a Fe-N-C single-atom catalyst with a nitrogen co...
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