Mesoporous platinum palladium cobalt alloy nanosphere for catalyzing oxidation reaction of formic acid and preparation method of mesoporous platinum palladium cobalt alloy nanosphere
A technology of formic acid oxidation and nanospheres, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as cumbersome synthesis steps, and achieve simple synthesis methods, mild reaction conditions and high yields. Effect
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Embodiment 1
[0037] A method for preparing a mesoporous platinum-palladium-cobalt alloy nanosphere that catalyzes the oxidation reaction of formic acid, said method comprising the steps of:
[0038] 1) chloroplatinic acid, sodium chloropalladate and cobalt chloride solution with a concentration of 20mM, hydrochloric acid solution with a concentration of 6M and ascorbic acid solution with a concentration of 0.1M;
[0039] 2) Mix 2.4mL of chloroplatinic acid, 0.8mL of sodium chloropalladate and 0.8mL of cobalt chloride solution, then add 0.05mL of hydrochloric acid solution, then add 0.04g of F127; finally add 4mL of ascorbic acid solution ,well mixed;
[0040] 3) After the solution is fully mixed, place it in a water bath and heat it to 40° C., react for 4 hours, wash, centrifuge, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.
[0041] The SEM figure of the obtained platinum palladium cobalt mesoporous nanospheres is shown in figure 1 . The TEM picture of the o...
Embodiment 2
[0044] A kind of preparation method of the mesoporous platinum-palladium alloy nanosphere of catalytic formic acid oxidation reaction, described method comprises the steps:
[0045] 1) chloroplatinic acid and sodium chloropalladate solutions with a concentration of 20mM, hydrochloric acid solution with a concentration of 6M and ascorbic acid solution with a concentration of 0.1M are prepared respectively;
[0046] 2) Mix 3mL of chloroplatinic acid and 1mL of sodium chloropalladate solution, then add 0.05mL of hydrochloric acid solution prepared in advance, then add 0.04g of F127, and ultrasonically dissolve it completely; finally add 4mL of ascorbic acid solution;
[0047] 3) After the solution is uniformly mixed, place it in an ultrasonic cleaner and heat it to 40° C., react for 4 hours, wash with ultrapure water, collect the product by centrifugation, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.
[0048] It can be seen from the SEM image that wh...
Embodiment 3
[0050] A method for preparing a mesoporous platinum-palladium-cobalt alloy nanosphere that catalyzes the oxidation reaction of formic acid, said method comprising the steps of:
[0051] 1) chloroplatinic acid, sodium chloropalladate and cobalt chloride solution with a concentration of 10mM, hydrochloric acid solution with a concentration of 1M and ascorbic acid solution with a concentration of 0.02M;
[0052] 2) Mix 2.4mL of chloroplatinic acid, 0.8mL of sodium chloropalladate and 0.8mL of cobalt chloride solution, then add 0.01mL of hydrochloric acid solution, then add 0.01g of F127; finally add 1mL of ascorbic acid solution ,well mixed;
[0053] 3) After the solution is fully mixed, place it in a water bath and heat it to 25° C., react for 1 hour, wash, centrifuge, and dry to obtain mesoporous platinum-palladium-cobalt alloy nanospheres.
[0054] During the reaction, the concentration of chloroplatinic acid, sodium chloropalladate and cobalt chloride solution is very low, s...
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