Electrochemical preparation method of nano porous palladium
A nanoporous and electrochemical technology, applied in the field of electrochemical preparation of nanoporous palladium, can solve problems such as poor working conditions, toxicity and irritation, and serious environmental pollution, and achieve the effect of reducing production costs
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Embodiment 1
[0022] (1) According to the ratio of 20% Pd by atomic percentage, and the rest is Al, put pure metal Al and Pd into a smelting furnace and heat to a molten state, and alloy them after sufficient stirring. Use argon to quickly blow out the molten liquid under a pressure of 0.1MPa, and chill it on a high-speed rotating copper roller with a cooling rate of 10 5 K / s, obtain a thin alloy strip with a thickness of 20-50 microns, a width of 2-5 mm, and a length of 1-10 cm;
[0023] (2) At 25°C, with the Al-Pd alloy as the working electrode, the platinum sheet as the counter electrode, the saturated calomel electrode as the reference electrode, and the 10wt% sodium chloride solution as the electrolyte, the overvoltage is 0.5V, and the electrochemical Dealloying treatment for 1 hour;
[0024] (3) Collect the reacted product, and rinse it repeatedly with distilled water until the electrolyte solution is completely washed (extensive pH test paper checks that the rinsed distilled water i...
Embodiment 2
[0026] (1) According to the ratio of 30% Pd by atomic percentage, and the rest is Al, put pure metal Al and Pd into a smelting furnace and heat them to a molten state, and alloy them after sufficient stirring. Use nitrogen to blow out the molten liquid rapidly under the pressure of 0.5MPa, and chill it on a high-speed rotating copper roller with a cooling rate of 10 3 K / s, obtain a thin alloy strip with a thickness of 20-40 microns, a width of 2-5 mm, and a length of 5-10 cm;
[0027] (2) At 60°C, with Al-Pd alloy as the working electrode, platinum wire as the counter electrode, a saturated silver chloride electrode as the reference electrode, 26wt% sodium chloride solution as the electrolyte, and an overvoltage of 1.0V, the electrode Chemical dealloying treatment for 0.5 hours;
[0028] (3) Collect the reacted product, and rinse it repeatedly with distilled water until the electrolyte solution is completely washed (extensive pH test paper checks that the rinsed distilled wat...
Embodiment 3
[0030] (1) According to the ratio of 40% Pd by atomic percentage, and the rest is Al, put pure metal Al and Pd into a smelting furnace and heat them to a molten state, and alloy them after sufficient stirring. The molten liquid is quickly blown out with nitrogen gas under a pressure of 1MPa, chilled on a high-speed rotating copper roller, and the cooling rate is 10 6 K / s, obtaining a thin alloy strip with a thickness of 20-40 microns, a width of 2-5 mm, and a length of 2-5 cm;
[0031] (2) Under 90 ℃, with Al-Pd alloy as working electrode, platinum plate as counter electrode, saturated silver chloride electrode as reference electrode, 25wt% potassium chloride solution as electrolyte, overvoltage is 1.0V, carry out electroplating Chemical dealloying treatment for 0.1 hour;
[0032] (3) Collect the reacted product, and rinse it repeatedly with distilled water until the electrolyte solution is completely washed (extensive pH test paper checks that the rinsed distilled water is n...
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