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Preparation method of hollow PtPd nanometer material

A nanomaterial, hollow technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of uneven hollow PtPd nanomaterials, inability to accurately replicate template morphology, local fragmentation, and increased surface roughness

Inactive Publication Date: 2016-05-04
重庆稳稳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, another problem in the preparation of hollow PtPd nanomaterials using cuprous oxide as a template is: adding aqueous solutions of chloroplatinic acid and sodium chloropalladate to Cu 2 When in O water suspension, the Cu that first contacts chloroplatinic acid and sodium chloropalladate will be caused due to the inhomogeneity of the reactant in the system. 2 O is overcoated, causing inhomogeneity in the reaction, and thus the inhomogeneity of the final hollow PtPd nanomaterials, manifested by the inability to accurately replicate the template morphology, a large number of local fragments, and increased surface roughness.

Method used

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  • Preparation method of hollow PtPd nanometer material
  • Preparation method of hollow PtPd nanometer material
  • Preparation method of hollow PtPd nanometer material

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Experimental program
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Embodiment 1

[0033] The preparation method of the hollow PtPd nanometer material of embodiment 1, comprises the following steps:

[0034] (1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of ethanol, and add 20 mM of H 2 PtCl 6 ethanol solution and 33mM Na 2 PdCl 4 Ethanol solution, so that the atomic ratio Pt / Pd in ​​the system is 4:1, PtCl 6 2 - and PdCl 4 2 - The molar ratio of the sum to cuprous oxide is 1.4: 1, and the mixture is ultrasonically stirred and mixed for 90 minutes at 20° C.;

[0035] (2) Add the mixed solution obtained in step (1) dropwise to 10 times the volume of water at a rate of 12ml / min, and stir and react at 20°C for 60min;

[0036] (3) Move the reaction system in step (2) into a heating device and heat it to 60°C at a heating rate of 1°C / min, and continue to react at this temperature for 120min;

[0037] (4) After the reaction is completed, the product is centrifuged at 5000 rpm for 5 min, and 20% ammonia water is added for...

Embodiment 2

[0039] The preparation method of the hollow PtPd nanometer material of embodiment 2, comprises the following steps:

[0040](1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of methanol, and add 20 mM H 2 PtCl 6 methanol solution and 33 mM Na 2 PdCl 4 Methanol solution, so that the atomic ratio Pt / Pd in ​​the system is 4:1, PtCl 6 2 - and PdCl 4 2 - The molar ratio of the sum to cuprous oxide is 2.0: 1, and ultrasonically stirred and mixed for 70min at 22°C;

[0041] (2) Add the mixed solution obtained in step (1) dropwise to 12 times the volume of water at a rate of 15ml / min, and stir and react at 22°C for 50min;

[0042] (3) Move the reaction system of step (2) into the heating device and heat it to 62°C at a heating rate of 2°C / min, and continue to react at this temperature for 100min;

[0043] (4) After the reaction is completed, the product is centrifuged at 8,000 rpm for 4 min, and 25% ammonia water is added to complex and remove ...

Embodiment 3

[0045] The preparation method of the hollow PtPd nano material of embodiment 3, comprises the following steps:

[0046] (1) Ultrasonically disperse 10 mg of cuprous oxide with a cubic structure in 10 ml of ethylene glycol, and add 20 mM of H under stirring conditions. 2 PtCl 6 Ethylene glycol solution and 33mM Na 2 PdCl 4 Ethylene glycol solution, so that the atomic ratio Pt / Pd in ​​the system is 4:1, PtCl 6 2 - and PdCl 4 2 - The molar ratio of the sum to cuprous oxide is 2.3: 1, and the mixture is ultrasonically stirred and mixed for 60min at 25°C;

[0047] (2) Add the mixed solution obtained in step (1) dropwise to 15 times the volume of water at a rate of 20ml / min, and stir and react at 25°C for 30min;

[0048] (3) Move the reaction system in step (2) into a heating device and heat it to 65°C at a heating rate of 3°C / min, and continue to react at this temperature for 90min;

[0049] (4) After the reaction is completed, the product is centrifuged at 10,000 rpm for 3...

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Abstract

The invention discloses a preparation method of a hollow PtPd nanometer material, comprising the following steps: (1) uniformly dispersing cuprous oxide to low mass molecule alcohol, adding a low mass molecule alcohol solution containing PtCl6(2-) and PdCl4(2-) while stirring, and carrying out ultrasonic stirring and mixing; (2) dripping a mixed solution obtained in step (1) to water, and carrying out stirring reaction for 30-60min at the temperature of 20-25 DEG C; (3) transferring a reaction system in the step (2) to a heating device and heating to 60-65 DEG C at the heating rate of 1-3 DEG C / min, and continuing to react for 90-120min at current temperature; and (4) removing a cuprous oxide core after reaction is completed so as to obtain the hollow PtPd nanometer material. The hollow PtPd nanometer material prepared by adopting the method can meet the stoichiometric ratio of reactants, and can uniformly and precisely copy the morphology of a cuprous oxide template.

Description

technical field [0001] The invention relates to the technical field of hollow nanomaterials, in particular to a method for preparing hollow PtPd nanomaterials. Background technique [0002] Hollow nanomaterials have a large specific surface area, rich pore structure, and small constituent units, which can accommodate a large number of guest molecules or larger molecules, making them have unique properties in practical applications. Hollow PtPd nanomaterials combine the advantages of hollow structure and noble metal nanoparticles, and have properties such as low density, large specific surface area, high stability, and surface permeability. Compared with unit Pt catalysts, they have more catalytic active sites and more Strong anti-chloride ion poisoning ability and greatly improved electrocatalytic activity make it have special application prospects in the fields of biochemistry, catalysis, and material science. It is reported that cubic hollow PtPd nanomaterials have better...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/0549B22F1/054
Inventor 田亮亮伍沈平李璐杨聪陈艳玲夏楷东
Owner 重庆稳稳科技有限公司
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