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In-suit loaded type foam microporous precious metal catalyst, and preparation method thereof

A precious metal catalyst, supported technology, used in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. , to reduce costs

Active Publication Date: 2018-09-04
嘉兴长维新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the microstructure of the foam microporous noble metal catalyst is in the shape of three-dimensional "bridged" foam micropores, and generally exists in the form of strips or blocks, there is no good dispersibility, so it is difficult to obtain a catalyst similar to that of noble metal nanoparticles. The method used is loaded on the above carrier
In addition, since bulk or strip-shaped foamed microporous noble metal catalyst materials are generally brittle, it is difficult to process them into specific physical shapes and better mechanical structure stability without a carrier according to the needs of practical applications. catalyst material, thus greatly limiting its further wide application

Method used

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  • In-suit loaded type foam microporous precious metal catalyst, and preparation method thereof
  • In-suit loaded type foam microporous precious metal catalyst, and preparation method thereof
  • In-suit loaded type foam microporous precious metal catalyst, and preparation method thereof

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example

[0051] This embodiment provides an example of preparing a foam microporous nickel-platinum catalyst supported in situ, and the preparation method includes the following steps:

[0052] (1) The molecular formula of the selected formula is Zr 45 Ti 15 Ni 22 Pt 8 al 10 According to the formula, the raw materials are weighed, and the alloy melt is obtained after melting. The alloy melt is prepared by the crucible melt drawing method with a diameter of 120 μm and a length of about 50 m. The amorphous phase content is 95% Zr 45 Ti 15 Ni 22 Pt 8 al 10 alloy wire, and further weave the alloy wire into a mesh.

[0053] (2) at room temperature, clip 0.25 gram of Zr prepared in step (1) 45 Ti 15 Ni 22 Pt 8 al 10 Alloy wire mesh, which is submerged in 1L hydrofluoric acid aqueous solution with a concentration of 0.015mol / L for dealloying reaction. During the reaction, Zr, Ti, Al, and most of Ni at the reaction interface will react with hydrofluoric acid and become ions into ...

Embodiment 2

[0059] This embodiment provides an example of preparing a foam microporous gold-platinum alloy catalyst supported in situ, and the preparation method includes the following steps:

[0060] (1) The molecular formula of the selected formula is Zr 55 Ni 24 Au 7 Pt 7 Y 7 According to the formula, the raw materials are weighed, and the alloy melt is obtained after melting, and the alloy melt is prepared by the crucible-type melt drawing method to prepare the Zr 55 Ni 24 Au 7 Pt 7 Y 7 alloy wire, and further weave the alloy wire into a mesh.

[0061] (2) at room temperature, clip 0.3 gram of Zr prepared in step (1) 55 Ni 24 Au 7 Pt 7 Y 7 Alloy wire mesh, which is immersed in 2L of hydrofluoric acid aqueous solution with a concentration of 0.2mol / L for dealloying reaction. During the reaction, Zr, Y, and most of Ni at the reaction interface will react with hydrofluoric acid and become ions into the solution, while the remaining Au, Pt, and a small amount of Ni will form...

Embodiment 3

[0063] Present embodiment provides an example of the foam microporous gold-palladium alloy catalyst that prepares alloy wire (network) support, and this preparation method comprises the steps:

[0064] (1) The molecular formula of the selected formula is Zr 50 co 26 Au 7 PD 7 al 10 According to the formula, the raw materials are weighed, the alloy melt is obtained after melting, and the alloy melt is prepared by the crucible-type melt drawing method to prepare Zr with a diameter of 80 μm and a length of about 100 m. 50 co 26 Au 7 PD 7 al 10 alloy wire.

[0065] (2) at room temperature, clip 0.3 gram of Zr prepared in step (1) 50 co 26 Au 7 PD 7 al 10 Alloy wire, which is immersed in 1L of hydrofluoric acid aqueous solution with a concentration of 0.02mol / L for dealloying reaction. During the reaction, Zr, Al, and most of Co at the reaction interface will react with hydrofluoric acid and become ions into the solution, while the remaining Au, Pd, and a small amount...

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Abstract

The invention discloses an in-suit loaded type foam microporous precious metal catalyst, and a preparation method thereof. According to the preparation method, an amorphous alloy wire with a cross section area of S0 (or a woven product of the amorphous alloy wire) is taken as a precursor, and is immersed in an acid solution for corrosion of the amorphous alloy at certain depth of the external surface of the amorphous alloy wire through dealloying reaction so as to obtain a nanometer porous precious metal catalytic layer, and at the same time, a amorphous wire core with a cross section area ofS(S<S0) is maintained as a structure support, so that the in-suit loaded type foam microporous precious metal catalyst with a foam microporous precious metal annular external shell catalytic layer andan internal amorphous wire core composite structure. The preparation method is low in cost, is simple in operation, and is controllable, and is capable of producing the precious metal catalyst material with an excellent structure and excellent performance.

Description

technical field [0001] The invention relates to the technical field of nanometer metal materials, in particular to an in-situ supported foam microporous noble metal catalyst and a preparation method thereof. Background technique [0002] A noble metal catalyst is a noble metal material that can change the rate of a chemical reaction without itself participating in the final product of the reaction. Since the d electron orbitals of noble metal elements are not filled, the surface is easy to adsorb reactants, and the strength is moderate, which is conducive to the formation of intermediate "active compounds", so it has high catalytic activity, and also has high temperature resistance, oxidation resistance, corrosion resistance, etc. Comprehensive excellent properties, is currently the most important catalyst material. [0003] In practical applications, in order to ensure the performance of the catalyst and reduce the amount of noble metal used as much as possible, the most e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J35/10
CPCB01J23/892B01J23/894B01J23/8946B01J35/33B01J35/60
Inventor 潘登赵远云付振闯
Owner 嘉兴长维新材料科技有限公司
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