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Method for preparing hollow PtPd nano material with cuprous oxide as template

A technology of cuprous oxide and nanomaterials, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of severe redox reaction, rough surface of the final product, inability to accurately copy the shape of the template, etc., and achieve the effect of precise composition control

Active Publication Date: 2016-05-04
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under heating conditions, chloroplatinic acid and sodium chloropalladate and Cu 2 The redox reaction of O is very violent, resulting in an extremely rough surface of the final product, which cannot accurately replicate Cu 2 Morphology of O-template

Method used

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  • Method for preparing hollow PtPd nano material with cuprous oxide as template
  • Method for preparing hollow PtPd nano material with cuprous oxide as template
  • Method for preparing hollow PtPd nano material with cuprous oxide as template

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The method for preparing hollow PtPd nanomaterials using cuprous oxide as a template in Example 1 includes the following steps:

[0030] (1) Disperse 10 mg of cubic structure cuprous oxide uniformly in 10 ml of water ultrasonically, add 20 mM H under stirring at 20°C 2 PtCl 6 Aqueous solution and 33mM Na 2 PdCl 4 Aqueous solution to make the atomic ratio Pt / Pd in ​​the reaction solution 4:1, PtCl 6 2 -And PdCl 4 2 -The molar ratio of the sum to cuprous oxide is 1.4:1, and the reaction is stirred at this temperature for 60 minutes;

[0031] (2) Move the reaction system of step (1) into a heating device and heat it to 60°C at a heating rate of 1°C / min, and continue the reaction at this temperature for 120 minutes;

[0032] (3) After the reaction is completed, the product is centrifuged at 5000 rpm for 5 minutes, 20% ammonia is added to complex to remove the cuprous oxide nucleus, and then 0.1 mol / L nitric acid is added to react at 25°C to remove the copper produced by the disprop...

Embodiment 2

[0034] The method for preparing hollow PtPd nanomaterials using cuprous oxide as a template in Example 2 includes the following steps:

[0035] (1) Disperse 10 mg of cubic structure cuprous oxide uniformly in 10 ml of water ultrasonically, add 20 mM H under stirring at 22°C 2 PtCl 6 Aqueous solution and 33mM Na 2 PdCl 4 Aqueous solution to make the atomic ratio Pt / Pd in ​​the reaction solution 4:1, PtCl 6 2 -And PdCl 4 2 -The molar ratio of the sum to the cuprous oxide is 2.0:1, and the reaction is stirred at this temperature for 50 minutes;

[0036] (2) Move the reaction system of step (1) into a heating device and heat it to 62°C at a heating rate of 2°C / min, and continue the reaction at this temperature for 100 minutes;

[0037] (3) After the reaction is completed, the product is centrifuged at 8000 rpm for 4 min, 25% ammonia water is added to complex to remove the cuprous oxide nucleus, and then 0.2 mol / L nitric acid is added to react at 20°C to remove the copper produced by the d...

Embodiment 3

[0039] The method for preparing hollow PtPd nanomaterials using cuprous oxide as a template in Example 3 includes the following steps:

[0040] (1) Disperse 10 mg of cubic structure cuprous oxide uniformly in 10 ml of water ultrasonically, and add 20 mM H under stirring at 25°C 2 PtCl 6 Aqueous solution and 33mM Na 2 PdCl 4 Aqueous solution to make the atomic ratio Pt / Pd in ​​the reaction solution 4:1, PtCl 6 2 -And PdCl 4 2 -The molar ratio of the sum to cuprous oxide is 2.3:1, and the reaction is stirred at this temperature for 30 minutes;

[0041] (2) Move the reaction system of step (1) into a heating device and heat it to 65°C at a heating rate of 3°C / min, and continue the reaction at this temperature for 90 minutes;

[0042] (3) After the reaction is completed, the product is centrifuged at 10,000 rpm for 3 minutes, 25% ammonia is added to complex to remove the cuprous oxide nucleus, and then 0.5 mol / L nitric acid is added to react at 10°C to remove the copper produced by the di...

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Abstract

The invention discloses a method for preparing a hollow PtPdnano material with cuprous oxide as a template. The method comprises the following steps that (1) the cuprous oxide is uniformly dispersed into water, an aqueous solution containing PtCl<6><2-> and PdCl<4><2-> is added under the stirring condition at the temperature of 20-25 DEG C, and a stirring reaction is conducted for 30-60 minutes at the temperature; (2) the reaction system in the step (1) is moved into a heating device and heated to the temperature of 60-65 DEG C at the heating speed of 1-3 DEG C / min, and the reaction continues to be conducted for 90-120 minutes at the temperature; and (3) after the reaction is finished, cuprous oxide cores are removed, and the hollow PtPd nano material is obtained. According to the hollow PtPd nano material obtained through the method, the shape of the cuprous oxide template is accurately duplicated, the atomic ratio Pt / Pd of the nano PtPd nano material is made to be close to the atomic ratio Pt / Pd of the reaction solution, the requirement for the stoichiometric ratio of reactants is met, and accurate component controlling is achieved.

Description

Technical field [0001] The invention relates to the technical field of hollow nanomaterials, in particular to a method for preparing hollow PtPd nanomaterials using cuprous oxide as a template. Background technique [0002] Hollow nanomaterials have a large specific surface area and a rich pore structure, and small constituent units can accommodate a large number of guest molecules or molecules with larger sizes, making them unique in practical applications. Hollow PtPd nanomaterials combine the advantages of hollow structure and precious metal nanoparticles. They have the properties of low density, large specific surface area, high stability and surface permeability. Compared with the unit Pt catalyst, they have more catalytic active sites and more The strong resistance to chloride ion poisoning and the greatly improved electrocatalytic activity make it have special application prospects in biochemistry, catalysis, materials science and other fields. It is reported that cubic h...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/0549B22F1/054
Inventor 田亮亮陈艳玲杨聪伍沈平夏楷东
Owner CHONGQING UNIV OF ARTS & SCI
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