A kind of self-optimized alloy catalyst and its preparation method and application

Abstract

The invention belongs to the field of alloy catalysts, and specifically discloses a self-optimizing alloy catalyst as well as its preparation method and application. The preparation method of the present invention comprises the following steps: (1) vacuum smelting Ag simple substance, Cu simple substance and Al simple substance to obtain Ag X Cu Y al Z Alloy, wherein X+Y+Z=100, X:Y:Z=(15-30):(0.1-1):(69-84.9); (2) strip the alloy to make an alloy strip; (3) Alloy strips are removed with acid to obtain the initial state catalyst; (4) The initial state catalyst is electrochemically treated to make Cu segregate on the Ag surface, and the catalyst can be obtained. The alloy catalyst prepared by the invention is a kind of catalytic material with self-optimization function, stable catalytic performance, high current density and high catalytic efficiency after optimization, suitable for mass production and beneficial to industrial application.

Description

technical field [0001] The invention belongs to the field of alloy catalysts, and in particular relates to a self-optimizing alloy catalyst and its preparation method and application. Background technique [0002] The catalytic activity and stability of catalysts are two core issues in the field of catalysis. In the catalytic reaction of alloy catalysts, as the reaction time increases, the catalytic performance of the catalyst will generally decrease to varying degrees, especially involving nanoscale catalysts. , because of its high surface free energy, although it can have high-efficiency catalytic performance in a short period of time, it is extremely easy to condense as the working time increases, resulting in a decline in catalytic performance. [0003] CN101722009B discloses a nano-Au catalyst and its preparation method and application. It specifically discloses Au and additives supported on a mixed oxide mainly composed of copper oxide. The additives are selected from ...

AI Technical Summary

Problems solved by technology

The Ag / Cu double alloy catalyst of this technical solution has excellent thermal conductivity, electrical conductivity and high catalytic activity. As the reaction time increases, both Ag and Cu nanoparticles are extremely prone to agglomeration and sintering, and the catalytic performance continues to decline.

[0005] Therefore, the prior art still needs a catalyst that can solve the problem of poor catalyst stability and significantly reduced catalytic activity after long-term use.

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