A method for preparing metal-nitrogen-doped carbon catalytic materials using metal ionic liquids
A technology of nitrogen-doped carbon and catalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. High cost and other issues, to achieve good catalytic activity and selectivity, wide application range, and low cost effects
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Embodiment 1
[0040] The synthesis of embodiment 1, Ni / C-N material
[0041] The precursor used in the synthesis of Ni / C-N materials is a metal ionic liquid, the ionic liquid used is 1-butyl-3-methylimidazolium chloride [Bmim]Cl, and the nickel ion salt used is anhydrous NiCl 2 , the two are mixed and heated to obtain a metal ionic liquid [Bmim] 2 [NiCl 4 ], as shown in Formula II-1, and then the metal ionic liquid is pyrolyzed at high temperature to obtain Ni / C-N material. Specific steps are as follows:
[0042]
[0043] Add 1-butyl-3-methylimidazolium chloride salt and nickel chloride into a round bottom flask at a molar ratio of 1:1, stir at 70°C for 24 hours, and then perform multiple extractions with a small amount of dichloromethane Separation, and then use a vacuum rotary evaporator to rotate the extract at 50°C to remove dichloromethane and most of the water, and then place it in a vacuum drying oven to remove the remaining moisture. The drying temperature is 80°C. After dryi...
Embodiment 2
[0048] The synthesis of embodiment 2, Ni / C-N material
[0049] The precursor used in the synthesis of Ni / C-N materials is a metal ionic liquid, the ionic liquid used is 1-butyl-3-methylimidazolium bromide [Bmim]Br, and the nickel ion salt used is anhydrous NiBr 2 , the two are mixed and heated to obtain a metal ionic liquid [Bmim] 2 [NiBr 4 ], as shown in Formula II-2, and then the metal ionic liquid is pyrolyzed at high temperature to obtain Ni / C-N material. Specific steps are as follows:
[0050]
[0051] Add 1-butyl-3-methylimidazolium bromide and anhydrous nickel bromide into a round-bottomed flask at a molar ratio of 1:1, stir and react at 70°C for 24 hours, and then use a small amount of dichloromethane to Repeated extraction and separation, and then use a vacuum rotary evaporator to rotate the extract at 50°C to remove dichloromethane and most of the water, and then place it in a vacuum drying oven to remove the remaining moisture. The drying temperature is After...
Embodiment 3
[0054] The synthesis of embodiment 3, Ni / C-N material
[0055] The precursor used in the synthesis of Ni / C-N materials is a metal ionic liquid, the ionic liquid used is 1-butyl-3-methylimidazolium iodide [Bmim]I, and the nickel ion salt used is anhydrous NiI 2 , the two are mixed and heated to obtain a metal ionic liquid [Bmim] 2 [NiI 4 ], as shown in formula II-3, and then the metal ionic liquid is pyrolyzed at high temperature to obtain Ni / C-N material. Specific steps are as follows:
[0056]
[0057] Add 1-butyl-3-methylimidazolium iodide salt and anhydrous nickel iodide into a round-bottomed flask at a molar ratio of 1:1, stir and react at 70°C for 24 hours, and then use a small amount of dichloromethane to Repeated extraction and separation, and then use a vacuum rotary evaporator to rotate the extract at 50°C to remove dichloromethane and most of the water, and then place it in a vacuum drying oven to remove the remaining moisture. The drying temperature is After ...
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