Core-shell structure pd@pt/c or pdm@pt/c catalyst and its preparation
A core-shell structure and catalyst technology, applied in structural parts, nanotechnology for materials and surface science, electrical components, etc., can solve problems such as difficult to achieve mass production, complex and harsh preparation conditions, etc., and achieve electrochemical stability Excellent, pure product, effect of reducing dosage
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Embodiment example 1
[0038] 1. Weigh 50mg of Pd / C into a three-neck flask (Pd content is 70wt%), add 60ml of water, and ultrasonicate for 1h to obtain the mixed solution B;
[0039] 2. Under the action of magnetic stirring, pass Ar gas into the Pd / C mixture for 40mins, and then replace it with H 2 / Ar(H 2 content is 50%) mixed gas for 15 hours;
[0040] 3. Inject Ar gas into the above mixture again for 50 minutes;
[0041] 4. Weigh 14mg K 2 PtCl 4 , dissolved in 33ml of water to form a solution A (K 2 PtCl 4 The molar volume concentration of ~1×10 -3 mol / L) and then to K 2 PtCl 4 Introduce Ar gas into the solution for 40 minutes;
[0042] 5. Put K 2 PtCl 4 The solution is added to the above Pd / C mixed solution to form a mixed solution C (the molar ratio of Pd and Pt is 1:0.1), and the reaction is stirred for 2 hours under an Ar gas atmosphere;
[0043] 6. Suction filter the obtained reaction product, wash 4 times with ultrapure water, and dry in a vacuum oven at 60° C. for 4 hours to o...
Embodiment example 2
[0046] 1. Weigh 50mg of PdM / C into a three-neck flask (Pd content is 20wt%), add 100ml of water, and ultrasonicate for 30min to obtain the mixed solution B;
[0047] 2. Under the action of magnetic stirring, pass Ar gas into the PdM / C mixture for 30 minutes, and then replace it with H 2 / Ar(80%) mixed gas for 15h;
[0048] 3. Introduce Ar gas into the above solution again for 30 minutes;
[0049] 4. Weigh 52.5mg Na 2 PtCl 6 Hexahydrate, dissolved in 10ml of water to form solution A (Na 2 PtCl 6 The molar volume concentration of ~9×10 -3 mol / L) and then to Na 2 PtCl 6 Introduce Ar gas into the solution for 30 minutes;
[0050] 5. Na 2 PtCl 6 The solution was added to the above PdM / C mixed solution to form a mixed solution C (the molar ratio of Pd and Pt was 1:1), and the reaction was stirred for 2 hours under an Ar gas atmosphere;
[0051] 6. Suction filter the obtained reaction product, wash 4 times with ultrapure water, and dry in a vacuum oven at 80° C. for 4 hour...
Embodiment example 3
[0054] 1. Weigh 100mg of Pd / C into a three-neck flask (Pd content is 5wt%), add 50ml of water, and ultrasonicate for 30min to obtain the mixed solution B;
[0055] 2. Under the action of magnetic stirring, pass Ar gas into the Pd / C mixture for 30 minutes, and then replace it with H 2 , last for 15h;
[0056] 3. Introduce Ar gas into the above solution again for 30 minutes;
[0057] 4. Weigh 18mg Na 2 PtCl 4 , dissolved in 0.5ml of water to form solution A (Na 2 PtCl 4 The molar volume concentration of ~9×10 -2 mol / L) and then to Na 2 PtCl 4 Introduce Ar gas into the solution for 30 minutes;
[0058] 5. Na 2 PtCl 4 The solution is added to the above Pd / C mixed solution to form a mixed solution C (the molar ratio of Pd and Pt is 1:1), and the reaction is stirred for 2 hours under an Ar gas atmosphere;
[0059] 6. Suction filter the obtained reaction product, wash 4 times with ultrapure water, and dry in a vacuum oven at 80° C. for 4 hours to obtain a Pd@Pt / C catalyst....
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