A carbon nitride modified methanol electrocatalyst and its preparation method and application
An electrocatalyst, carbon nitride technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problems of slow mass transfer rate, poor conductivity of NiMnLDH, and the activity cannot meet commercial needs, and achieves a simple method, uniform morphology, The effect of cheap and easy to obtain electrocatalytic activity
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Embodiment 1
[0055] A preparation method of a carbon nitride-modified methanol electrocatalyst, comprising the following steps:
[0056] A. Mixing: At room temperature, 100 mg of urea and 100 mg of graphene were added to 50 mL of deionized water, and ultrasonically dispersed to uniformly disperse them. Dry at -40 °C and a vacuum of 0.5 Pa for 40 h; freeze-dried in air Internally calcined at 550°C for 2h; after cooling, the carbon nitride / graphene composite material is obtained;
[0057] B. Dispersion: Weigh 8 mg of carbon nitride / graphene composite material in 10 mL of a mixed solvent of ethylene glycol and water with a volume ratio of 1:1, and ultrasonically disperse it uniformly for 0.5 h;
[0058] C. Preparation: 0.0470g of nickel chloride hexahydrate and 0.0025g of manganese chloride tetrahydrate were added to a mixed solution of 10 mL of ethylene glycol and water (specific volume 1:1) at room temperature, and then the solution was gradually stirred under the action of stirring. Slowl...
Embodiment 2
[0068] A preparation method of a carbon nitride-modified methanol electrocatalyst, comprising the following steps:
[0069] A. Mixing: At room temperature, 50 mg of melamine and 50 mg of carbon black were added to 30 mL of deionized water and ultrasonically dispersed to make it evenly dispersed, dried at -50 °C and a vacuum of 10 Pa for 20 h, freeze-dried in an air atmosphere Calcined at 550℃ for 2h; after cooling, it is carbon nitride / carbon black composite material
[0070] B. Dispersion: Weigh 6 mg of carbon nitride / carbon black composite material in 10 mL of a mixed solvent of ethanol and water with a volume ratio of 1:1, and sonicate for 1 h to make it uniformly dispersed;
[0071] C. Preparation: 0.0580g nickel nitrate hexahydrate and 0.0025g manganese nitrate are added to a mixed solution of 10mL ethanol and water (specific volume 1:1) at room temperature, and then this solution is slowly added dropwise to step B under stirring 300mg of urea was added to the dispersion...
Embodiment 3
[0082] A preparation method of a carbon nitride-modified methanol electrocatalyst, comprising the following steps:
[0083] A. Mixing: At room temperature, 100 mg of dicyandiamide and 100 mg of carbon nanotubes were added to 60 mL of deionized water and ultrasonically dispersed to make them evenly dispersed, dried at -80 °C and a vacuum of 20 Pa for 15 h, and dried in air. Calcined at 600℃ for 2h in the atmosphere; after cooling, it is carbon nitride / carbon nanotube composites
[0084] B. Dispersion: Weigh 8 mg of carbon nitride / carbon nanotube composite material in 10 mL of a mixed solvent of methanol and water with a volume ratio of 1:1, and sonicate for 1 h;
[0085] C, preparation: at room temperature, add 0.0650g nickel sulfate hexahydrate and 0.0035g manganese sulfate monohydrate to a mixed solution of 10mL ethylene glycol and water (specific volume 1:1), then slowly drop this solution under the action of stirring To the dispersion of step B, add 180 mg of urea, and fin...
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