Preparation method of nano porous copper oxide loaded precious metal catalytic material

[0018] Example one

[0019] The raw material prepared by the molar ratio of 84.90% Al, 15.00% Cu and 0.10% Au is smelted into a uniform precursor alloy by arc heating to 800°C under vacuum, and then prepared into ingots by ordinary casting method; the alloy ingot is at 0.1MPa The melt is melted in a rapid quenching furnace under protective atmosphere and heated to 800℃, and the thin strip is prepared by the melt rapid quenching method; the thin strip is de-alloyed and corroded in the NaOH aqueous solution with a molar ratio of 10% for 10 hours, without obvious bubbles After that, it was repeatedly washed with deionized water and alcohol, cleaned and placed in a constant temperature drying oven at 40°C for 4 hours, and then roasted in an air atmosphere furnace at 600°C for 1 hour to prepare copper oxide supported gold nanoparticles nanoporous catalysts material. And it still has high structural stability and thermal stability after heat treatment at 600℃. After sintering, the size of the copper oxide is between 20-50 nanometers and the noble metal is firmly supported on the nanoporous copper oxide. Compared with nanoporous copper, the catalytic oxidation performance of CO is significantly improved.

[0020] Example two

[0021] The raw material prepared by the molar ratio of 79.70% Al, 20.00% Cu and 0.30% Au is heated to 850°C by arc melting in an argon atmosphere to form a uniform precursor alloy and then prepared into ingots by ordinary casting method; alloy casting The ingot is melted for the second time in a melt rapid quenching furnace under 0.1MPa protective atmosphere and heated to 850℃, and the thin strip is prepared by the melt rapid quenching method; the thin strip is dealloyed and corroded in a 5% NaOH aqueous solution with a molar ratio of 12 hours After there are no obvious bubbles, it is repeatedly washed with deionized water and alcohol. After cleaning, it is placed in a constant temperature drying oven at 40°C for 4 hours; and then baked in an air atmosphere furnace at 600°C for 1 hour to prepare copper oxide-loaded nano Gold particle nanoporous catalytic material. And the obtained nanocomposite material still has high structural stability and thermal stability after heat treatment at 750°C. The microstructure of the nanoporous catalytic material in this example can be found in figure 1 ,From figure 1 It can be seen that the size of the copper oxide after baking is between 30-50 nanometers and the noble metal is firmly supported on the nanoporous copper oxide. From figure 2 It can be seen that, compared with nanoporous copper, the catalytic oxidation performance of CO is significantly improved.

[0022] Example three

[0023] The raw material prepared by the molar ratio of 84.00% Al, 15.00% Cu and 1.00% Au is heated to 800°C with an electric arc in an argon atmosphere of 0.1MPa, and then smelted into a uniform precursor alloy and then prepared into ingots by ordinary casting method; alloy casting The ingot is melted for the second time in a melt rapid quenching furnace with a protective atmosphere of 0.1MPa and heated to 800°C, and a thin strip is prepared by the melt rapid quenching method. The thin strip was dealloyed and corroded in a 1% molar KOH aqueous solution for 6 hours. After there were no obvious bubbles, it was repeatedly washed with deionized water and alcohol. After cleaning, it was placed in a constant temperature drying oven at 40°C and dried for 4 hours. After roasting in an air atmosphere furnace at 750°C for 1 hour, a copper oxide-supported gold nanoparticle nanoporous catalytic material is prepared; the obtained nanoporous copper oxide-supported gold particle catalytic material has significantly enhanced CO catalytic oxidation performance compared with porous copper oxide. And it still has high structural stability and thermal stability after heat treatment at 600℃. After calcination, the size of the copper oxide is between 20-60 nanometers and the precious metal is firmly supported on the nanoporous copper oxide, and the size of the nano-gold particles remains below 10 nanometers. Compared with nanoporous copper, the catalytic oxidation performance of CO is significantly improved.