A kind of multi-level structure composite material and its preparation and application
A technology of composite materials and crystal water, which is applied in the direction of structural parts, fuel cell half-cells, primary battery half-cells, electrical components, etc. Stability and other issues, to achieve good application prospects, long charge and discharge cycle life, and low Pt content
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Embodiment 1
[0044] (1) Dissolve 1 g of glucose, 1 g of urea, and 20 g of sodium chloride in 75 mL of deionized water, mix well, freeze-dry at -50°C for 36 hours, and grind for 20 minutes; Raise the temperature to 300°C for 1 hour at a heating rate of min, continue to heat up to 800°C for carbonization for 2 hours, wash with water, and dry in a vacuum oven to obtain nitrogen-doped carbon nanosheets, denoted as N-CN;
[0045] (2) 0.033mmol CoCl 2 ·6H 2 O and 0.1 mmol H 2 PtCl 6 ·6H 2 O was added to 10 mL of deionized water, then 90 mg of N-CN nanosheets were added, and stirred at room temperature for 4 h to ensure that Co 2+ and Pt 4+ The ions were adsorbed to the pores of the N-CN nanosheets, and finally 20 mL of sodium borohydride solution (30 mmol / L) was added dropwise to react for 4 hours at 0°C, washed, and vacuum-dried to obtain CoPt / N-CN;
[0046] (3) Disperse the CoPt / N-CN in step (2) into 20 mL of deionized water, and ultrasonicate for 5 minutes to obtain a dispersion; dissol...
Embodiment 2
[0053] (1) Dissolve 1g of glucose, 1g of urea and 20g of sodium chloride in 75mL of deionized water, freeze-dry at -50°C for 36h, and grind for 20min; Heat up to 300°C for 1 hour, continue to heat up to 800°C for 2 hours, wash with water, and dry in a vacuum oven to obtain nitrogen-doped carbon nanosheets, denoted as N-CN;
[0054] (2) 0.033mmol NiCl 2 ·6H 2 O and 0.1 mmol H 2 PtCl 6 ·6H 2 O was added to 10 mL of deionized water, then 90 mg of N-CN nanosheets were added, and stirred at room temperature for 4 h to ensure that Ni 2+ and Pt 4+ Ions were adsorbed to the pores of the N-CN nanosheets, and finally 20 mL of sodium borohydride solution (30 mmol / L) was added dropwise, reacted at 0°C for 4 hours, washed, and dried in vacuum to obtain NiPt / N-CN;
[0055] (3) Disperse the NiPt / N-CN in step (2) into 20 mL of deionized water, and sonicate for 5 minutes to obtain a dispersion; dissolve 1 mmol of nickel nitrate hexahydrate and 0.4 mmol of ascorbic acid into 10 mL of deio...
Embodiment 3
[0057] (1) Dissolve 1 g of glucose, 1 g of urea, and 20 g of sodium chloride in 75 mL of deionized water, freeze-dry at -50°C for 36 hours, and grind for 20 minutes. Raise the temperature to 300°C for 1 hour, continue to heat up to 800°C for 2 hours, wash with water, and dry in a vacuum oven to obtain nitrogen-doped carbon nanosheets, denoted as N-CN;
[0058] (2) 0.033mmol FeCl 3 ·6H 2 O and 0.1 mmol H 2 PtCl 6 ·6H 2 O was added to 10 mL of deionized water, then 90 mg of N-CN nanosheets were added, and stirred at room temperature for 4 h to ensure that Fe 3+ and Pt 4+ Ions were adsorbed to the pores of the N-CN nanosheets, and finally 20 mL of sodium borohydride solution (30 mmol / L) was added dropwise, reacted at 0°C for 4 hours, washed, and dried in vacuum to obtain FePt / N-CN;
[0059] (3) Disperse the FePt / N-CN in step (2) into 20 mL of deionized water, and obtain a dispersion by ultrasonication for 5 min; dissolve 1 mmol of ferric nitrate hexahydrate and 0.4 mmol of ...
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