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Integrated porous palladium-gold alloy catalyst and preparation method thereof

A gold-palladium alloy and monolithic technology, which is applied in the field of monolithic porous gold-palladium alloy catalysts, and achieves the effects of good mass transfer, heat transfer and electrical conductivity, easy recovery and reuse, and simple preparation method.

Inactive Publication Date: 2014-11-05
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After searching, it has not been reported that the monolithic porous gold-palladium alloy catalyst is prepared by corroding gold-palladium-silver alloy by dealloying method

Method used

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  • Integrated porous palladium-gold alloy catalyst and preparation method thereof
  • Integrated porous palladium-gold alloy catalyst and preparation method thereof
  • Integrated porous palladium-gold alloy catalyst and preparation method thereof

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Embodiment Construction

[0008] A monolithic porous gold-palladium alloy catalyst, characterized in that: comprising a gold-palladium-silver alloy core and a porous gold-palladium alloy film with a thickness of 0.1 to 40 μm, the porous gold-palladium alloy film evenly covers the gold-palladium-silver alloy core For the outer layer, the diameter of the gold-palladium-silver alloy core is 1-800 μm, and the mass ratio of gold, palladium, and silver in the gold-palladium-silver alloy core is (25-50): (25-50): 25; the porous gold The palladium alloy film is a porous structure with small holes distributed continuously on the channel wall, the width of the channel is 0.1-10 μm, the diameter of the small holes is 1-500 nm, and the gold content of the porous gold-palladium alloy film is 20-500 nm. 99at.%, palladium content is 80~1at.%.

[0009] Preferably in the present invention, the diameter of the gold-palladium-silver alloy core is 80-120 μm, and the mass ratio of gold, palladium, and silver in the gold-pa...

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Abstract

The invention relates to an integrated porous palladium-gold alloy catalyst, and belongs to the technical field of chemical catalysts. A layer of copper is formed on the surface of a gold-palladium-silver alloy wire by means of electro-deposition, a copper coating and internal gold-palladium-silver alloy are alloyed after high-temperature annealing, and then are freely or electrochemically corroded by strong electrolyte solution, the prepared catalyst consists of a gold-palladium-silver alloy core and a porous gold-palladium alloy membrane with the thickness ranging from 0.1 micrometer to 40 micrometers, the porous gold-palladium alloy membrane uniformly covers an outer surface layer of the gold-palladium-silver alloy core, and the diameter of the gold-palladium-silver alloy core ranges from 1 micrometer to 800 micrometers. A preparation method is simple and is applicable to various types of catalytic reaction including electro-catalysis and gas-phase catalysis. The surface of the porous palladium alloy catalyst prepared by the method is of a porous structure, the porous structure and metal components can be regulated and controlled, and integrated porous palladium-gold alloy catalyst are excellent in mass transfer, heat transfer and conductive performances and is recycled easily.

Description

technical field [0001] The invention relates to an integral porous gold-palladium alloy catalyst, which is applied to the electrocatalytic oxidation of methanol, ethanol, glucose, etc., and the gas-phase catalytic oxidation of benzyl alcohol, ethanol, etc., and belongs to the technical field of chemical catalysts. Background technique [0002] In recent years, gold-palladium bimetallic catalysts have been widely used in various catalytic reactions, especially for the catalytic oxidation of alcohols, showing good catalytic effect. H. Remita et al. prepared a nanostructure with gold as the core and porous palladium as the outer layer by the template method and found that this gold-palladium nanostructure has a good catalytic effect on the electrocatalytic oxidation of ethanol (Chem. Mater. 2009 21:3677–3683). A. Baiker et al. prepared gold-palladium alloy nanoparticles by the sol method and proved that the material has a good catalytic effect on the liquid-phase oxidation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52B01J35/10C07C47/54C07C45/38C25D5/50C25D5/48C25F3/14C23F1/02
Inventor 许效红沈浏鎏邢新峰
Owner SHANDONG UNIV
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