A kind of pd/mgf composite material and its preparation and application
A composite material, mesoporous graphene technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of large size of Pd nanoparticles, low carrier mass transfer rate, interference with catalytic activity, etc. Beneficial for fast electron transfer and high conductivity
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Embodiment 1
[0045] 1) Add 0.2g MCM-22 to the mixed solution containing 0.145g sucrose, 10μl concentrated sulfuric acid and 0.6ml water, stir evenly, after standing for 6h, pre-carbonize at 160°C for 18h, then add 0.087g sucrose, A mixed solution of 6 μl of concentrated sulfuric acid and 0.6ml of water was stirred evenly, left to stand for 6 hours, and then pre-carbonized at 160°C for 18 hours to obtain a solid powder.
[0046] 2) Put the solid powder in the step (1) into a tube furnace, and take it out after calcining at 800° C. for 2 h through Ar to obtain the MCM-22 / mesoporous graphene foam composite material, put 2.5L NaOH (4mol / L ) solution, stirred at 70° C. for 6 h, centrifuged, washed with water until neutral, and freeze-dried to obtain mesoporous graphene foam (MGF) powder.
[0047] 3) Add 0.3 mL K to 2.5 mL mesoporous graphene foam aqueous solution (20 mg / mL) dispersed uniform 2 PdCl 4 aqueous solution (0.15mol / L), after ultrasonication for 30min, add 0.5mL NaOH (1mol / L) and Na...
Embodiment 2
[0050] 1) Add 1.3g of MCM-22 to a mixed solution containing 0.9g of sucrose, 60μl of concentrated sulfuric acid and 3ml of water, stir evenly, and after standing for 6h, pre-carbonize at 180°C for 12h, then add 0.5g of sucrose, 30μl A mixed solution of concentrated sulfuric acid and 3ml of water was stirred evenly, left to stand for 6 hours, and then pre-carbonized at 100°C for 18 hours to obtain a solid powder.
[0051] 2) Put the solid powder in the step (1) into a tube furnace, and take it out after calcining at 800° C. for 2 h through Ar to obtain the MCM-22 / mesoporous graphene foam composite material, put 2.5L NaOH (4mol / L ) solution, stirred at 60° C. for 2 h, centrifuged, washed with water until neutral, and freeze-dried to obtain mesoporous graphene foam (MGF) powder.
[0052] 3) Add 0.06mL K to the uniformly dispersed 0.5mL mesoporous graphene foam aqueous solution (20mg / mL 2 PdCl 4 aqueous solution (0.15mol / L), after ultrasonication for 30min, add 0.1mL NaOH (2mol / ...
Embodiment 3
[0055] 1) Add 1g of MCM-22 to a mixed solution containing 0.8g of sucrose, 50μl of concentrated sulfuric acid and 3ml of water, stir evenly, let stand for 5h, pre-carbonize at 160°C for 18h, then add 0.4g of sucrose, 30μl of concentrated A mixed solution of sulfuric acid and 3ml of water was stirred evenly, left to stand for 5 hours, and then pre-carbonized at 160°C for 18 hours to obtain a solid powder.
[0056] 2) Put the solid powder in the step (1) into a tube furnace, and take it out after calcining at 1100° C. for 2 h through Ar to obtain the MCM-22 / mesoporous graphene foam composite material, put 1.5L NaOH (4mol / L ) solution, stirred at 60° C. for 6 h, centrifuged, washed with water until neutral, and freeze-dried to obtain mesoporous graphene foam (MGF) powder.
[0057] 3) Then add 0.6mL K to the uniformly dispersed 5mL mesoporous graphene foam aqueous solution (20mg / mL) 2 PdCl 4 aqueous solution (0.15mol / L), after ultrasonication for 30min, add 0.1mL NaOH (1mol / L) a...
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