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Palladium alloy catalyst, preparation method and applications thereof

A technology of catalyst and palladium alloy, which is applied in the field of palladium alloy catalyst and its preparation, can solve the problems of high cost and unsatisfactory electrocatalyst catalytic activity, and achieve the effects of reducing economic cost, high catalytic activity and stability, and improving stability

Inactive Publication Date: 2017-07-28
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a palladium alloy catalyst and its preparation method, to solve the technical problems of unsatisfactory catalytic activity and high cost of existing electrocatalysts

Method used

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  • Palladium alloy catalyst, preparation method and applications thereof

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preparation example Construction

[0026] Correspondingly, the embodiment of the present invention also provides a method for preparing the above-mentioned palladium alloy catalyst. The process of the preparation method is as follows figure 1 shown, including the following steps:

[0027] S01. Preparation of mixed materials containing palladium salts and base metal salts: mixing palladium salts, base metal salts, reducing agents and stabilizers / surfactants to form mixed materials;

[0028] S02. Performing a hydrothermal reduction reaction on the mixed material: performing a solid-liquid separation after performing a hydrothermal reduction reaction on the mixed material to obtain a mixture containing palladium and a base metal;

[0029] S03. Annealing the mixture containing palladium and base metal: annealing the mixture of palladium and base metal in a protective atmosphere to obtain alloy nanoparticles of palladium and base metal;

[0030] S04. Performing acid etching treatment on the alloy nanoparticles of ...

Embodiment 1

[0045] This embodiment provides a palladium alloy catalyst, the palladium alloy catalyst is alloy nanoparticles formed of palladium and copper elements, and the surface of the alloy nanoparticles has a porous structure.

[0046] Its preparation method is as follows:

[0047] S11: Weigh 0.03mmol of palladium chloride, 0.03mmol of copper acetylacetonate, 100mg of CTAB, 10ml of oleylamine and mix thoroughly by ultrasonication for half an hour;

[0048] S12: hydrothermally reacting at a temperature of 180° C. for 7 hours, and centrifuging and drying the product;

[0049] S13: Under the protection of argon, anneal at 250°C for 2 hours;

[0050] S14: Etching the product with acetic acid for 6 hours to obtain a porous PdCu alloy catalyst.

Embodiment 2

[0052] This embodiment provides a palladium alloy catalyst, the palladium alloy catalyst is alloy nanoparticles formed of palladium and copper elements, and the surface of the alloy nanoparticles has a porous structure.

[0053] Its preparation method is as follows:

[0054] S21: Weigh 0.03mmol of sodium chloropalladate, 0.03mmol of copper acetylacetonate, 100mg of PVP, and 10ml of oleylamine by ultrasonication for half an hour and mix well;

[0055] S22: heat water at a temperature of 180° C. for 12 hours, and centrifuge and dry the product;

[0056] S23: Annealing at 300°C for 2 hours under argon protection;

[0057] S24: Etching the product with acetic acid for 8 hours to obtain a porous PdCu alloy catalyst.

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Abstract

The present invention discloses a palladium alloy catalyst, a preparation method and applications thereof, wherein the palladium alloy catalyst is alloy nanoparticles formed from a palladium element and a base metal element, and the surface of the alloy nanoparticles has a porous structure. According to the present invention, by introducing the base metal into the palladium metal, the palladium metal content is effectively reduced, the economic cost of the palladium alloy catalyst is effectively reduced, the palladium metal provides the synergistic effect with the base metal, and the palladium alloy catalyst can have high catalytic activity and high stability through the porous structure on the surface; and with the method, the advantages of effectively-reduced catalyst production cost, energy source saving, environment protection and mass-production can be provided.

Description

technical field [0001] The invention belongs to the technical field of metal electrocatalysts, and in particular relates to a palladium alloy catalyst and its preparation method and application. Background technique [0002] In today's increasingly serious environmental and energy problems, reducing energy consumption and protecting the environment have become the top priority. Due to slow response, many processes and harsh conditions, traditional manufacturing requires more energy consumption and pollutes the environment. In view of this, it has become a problem to find an economical and environmentally friendly catalyst. The key to solving. [0003] A catalyst is a substance that can reduce the activation energy of a reaction, and its essence is to promote the progress of the reaction by breaking chemical bonds. Fuel cells are high-efficiency and green new power generation devices. Among them, direct methanol fuel cells using methanol as fuel and direct formic acid fuel ...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/92
CPCH01M4/626H01M4/921Y02E60/10Y02E60/50
Inventor 孙蓉盛家利康佳慧符显珠
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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