Method for preparing porous nickel-based amorphous alloy material

Abstract

The invention provides a method for preparing porous nickel-based amorphous alloy material. The method combines a chemical reduction method with an in-situ precipitation pore-forming agent generation method. The prepared alloy material is in porous structure, has the specific surface area of 300-700 m<2>/g and the pore volume of 0.5-1.5 cm<3>/g, and the prepared amorphous alloy consists of Ni and B or Ni, B and element M; and the element M is one or multiple elements of Cu, Mo, P and Co. The method comprises the following steps: (1) solution is prepared; (2) alloy and pore-forming agent precipitation are produced through in-situ generation; and (3) prickling pore-forming is carried out, and the porous nickel-based amorphous alloy material is finally obtained. The amorphous alloy material prepared by the method has the characteristics that the aperture ratio is controllable, the pore structure and pore distribution are uniform, and the specific surface area is large. According to the amorphous alloy material prepared by the method, the specific surface area can reach more than 650 m<2>/g, the pore volume can be more than 1 cm<3>/g, the pore diameter distribution is uniform (3-4 nm), and the pore diameter is controllable.

Description

technical field [0001] The invention relates to a method for preparing a porous nickel-based amorphous alloy material. Background technique [0002] Amorphous alloys have a structure of long-range disorder and short-range order in atomic arrangement, and it has the characteristics of isotropy, uniform distribution of active sites, high coordination unsaturation of active atoms, and unique electronic state, showing very high catalytic activity. , especially in unsaturated hydrogenation has excellent performance. When the material is used as a catalyst, it should have a high specific surface area, and a high specific surface area will allow more active sites to interact with the substrate. Therefore, in the research of amorphous alloy catalysts, one of the main problems to be solved is how to improve Specific surface area of ​​amorphous alloy catalytic materials. There have been related reports on the research work on improving its specific surface area. [0003] CN1262147 ...

AI Technical Summary

Problems solved by technology

[0007] The preparation of amorphous alloy catalytic materials by the loading method can significantly increase the specific surface area of ​​the prepared material by means of the large specific surface of the carrier itself; but due to the fast reaction speed of the chemical reduction method, and in the process of preparing the supported amorphous alloy, The carrier and the reaction solution are simply mixed together, it is difficult to ensure that the amorphous alloy material obtained by reduction will be loaded on the carrier, even if it is loaded on the carrier, its uniform dispersion is also difficult to achieve. In addition, the amorphous alloy and The firmness between supports is also the main factor affecting the use of catalysts

In addition, the current research results on directly increasing the specific surface area of ​​amorphous alloy materials show that the specific surface area of ​​the prepared material is still low, which is far from meeting the requirements for improving catalytic performance.

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