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Supported platinum-palladium-gold ternary alloy nano-catalyst as well as preparation method and application thereof

A nano-catalyst and ternary alloy technology, which is applied in electrical components, battery electrodes, circuits, etc., can solve the problems of restricting the commercialization of fuel cells, limited platinum reserves, and high prices, so as to improve the anti-poisoning effect, improve the utilization rate, The effect of improving performance

Inactive Publication Date: 2017-05-31
KUSN INNOVATION INST OF NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, platinum as an electrocatalyst has limited reserves and is expensive, which restricts the commercialization of fuel cells.

Method used

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  • Supported platinum-palladium-gold ternary alloy nano-catalyst as well as preparation method and application thereof
  • Supported platinum-palladium-gold ternary alloy nano-catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like Figure 1 ~ Figure 2 Shown, the preparation method of supported platinum-palladium-gold ternary alloy nano-catalyst comprises the following steps:

[0031] S01, measure 1.3mL PdCl 2 The HCl solution in the beaker, wherein the HCl solution is 0.5mol / L, the prepared PdCl 2 The solution is 5wt%; then slowly add a certain amount of ammonia water under magnetic stirring until the system is colorless, continue to stir for 30min, and set aside;

[0032] S02, weigh 0.5g pretreated carbon support in another beaker, add 2mL H 2 PtCl 6 and 0.9mLH 2 AuCl 6 The aqueous solution, the aqueous solution after preparation contains 2wt% H 2 PtCl 6 and 5 wt% H 2 AuCl 6 , ultrasonically dispersed in a low-temperature ultrasonic machine at 2°C for 40 minutes;

[0033] S03, add the solution in S01 to S02, and disperse at room temperature for 30 minutes;

[0034] S04, put the mixed solution of S03 on a magnetic stirrer at a temperature of 40° C. and evaporate until there is no ...

Embodiment 2

[0045] like Figure 1 ~ Figure 2 Shown, the preparation method of supported platinum-palladium-gold ternary alloy nano-catalyst comprises the following steps:

[0046] S01, measure 2mL PdCl 2 The HCl solution in the beaker, wherein the HCl solution is 0.1mol / L, the prepared PdCl 2 The solution is 3wt%; then slowly add a certain amount of ammonia water under magnetic stirring until the system is colorless, continue to stir for 30min, and set aside;

[0047] S02, weigh 0.5g pretreated 50g / m 2 Specific surface carbon support in another beaker, add 1.5mLH 2 PtCl 6 and 0.8mLH 2 AuCl 6 The aqueous solution, the aqueous solution after preparation contains 1wt% H 2 PtCl 6 and 2wt%H 2 AuCl 6 , ultrasonically dispersed in a low-temperature ultrasonic machine at 10°C for 40 minutes;

[0048] S03, add the solution in S01 to S02, and disperse for 40min at room temperature;

[0049] S04, put the mixed solution of S03 on a magnetic stirrer at a temperature of 80° C. and evaporate...

Embodiment 3

[0060] like Figure 1 ~ Figure 2 Shown, the preparation method of supported platinum-palladium-gold ternary alloy nano-catalyst comprises the following steps:

[0061] S01, measure 1.6mL PdCl 2 The HCl solution in the beaker, wherein the HCl solution is 0.1mol / L, the prepared PdCl 2 The solution is 3wt%; then slowly add a certain amount of ammonia water under magnetic stirring until the system is colorless, continue to stir for 30min, and set aside;

[0062] S02, weigh 0.5g pretreated carbon carrier in another beaker, add 2.2mL H 2 PtCl 6 and 1.0mLH 2 AuCl 6 The aqueous solution, the aqueous solution after preparation contains 1wt% H 2 PtCl 6 and 2wt%H 2 AuCl 6 , ultrasonically disperse in a low-temperature ultrasonic machine at 0-1°C for 50 minutes;

[0063] S03, add the solution in S01 to S02, and disperse at room temperature for 50 minutes;

[0064] S04, the mixed solution of S03 is magnetically stirred and evaporated at a temperature of 60°C on a magnetic stirre...

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Abstract

The invention discloses a supported platinum-palladium-gold ternary alloy nano-catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: S01, measuring a proper amount of HCl solution of PdCl2 in a beaker, slowly adding a certain amount of ammonia water under stirring conditions until the system is colorless, and continuously stirring for at least 30 minutes for later use; S02, weighing a certain amount of pretreated carbon support in another beaker, adding a proper amount of aqueous solution of H2PtCl6 and H2AuCl6, and uniformly dispersing in a low-temperature ultrasonic machine; S03, adding the solution in S01 into the beaker in S02, and uniformly dispersing at room temperature so as to obtain carbon mud; and S04, stirring and evaporating the carbon mud in S03 until obvious liquid does not exist in the carbon mud. The method is easy to operate, does not have any surfactant and is free from pollution and environmentally friendly, and the catalyst prepared by the method is stable in performance and high in repeatability and can be produced in batches.

Description

technical field [0001] The invention relates to a supported platinum-palladium-gold ternary alloy nano catalyst and a preparation method and application thereof, belonging to the technical field of fuel cells. Background technique [0002] Due to the burning of fossil fuels, global warming is accelerating, and the air quality in many cities around the world is declining. However, hydrogen energy is clean and pollution-free, which makes the energy policies of various countries turn to hydrogen energy. A fuel cell is an efficient and environmentally friendly power generation device that can directly convert the chemical energy stored in fuel and oxidant into electrical energy. The electrocatalyst of the fuel cell plays the role of the electrochemical reaction "factory" and is the core key material of the battery. In order for fuel cells to become a real commodity, many issues such as performance, cost, stability, durability, and environmental adaptability must be solved, amon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCH01M4/921Y02E60/50
Inventor 黄林刘文明陈佳倪锦吴明星刘建国吴聪萍邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV
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