Novel preparation method for Co-MOF catalyst and application of catalyst

Abstract

The invention discloses a novel preparation method for a Co-MOF catalyst and an application of the catalyst. The novel preparation method comprises the steps of adopting an electrochemical method, at a reaction voltage of 15-25V, and taking metal elementary substance Co as a positive electrode; through a positive electrode dissolving method, enabling Co<2+> dissolved from the positive electrode and 2-MI in an electrolyte solution to be subjected to a coordination reaction to generate a sample; and washing and drying the sample to finally obtain a Co-MOF (ZIF-67) catalyst. Introduction of metal salt negative ion impurities can be avoided, so that the prepared sample is purified. The prepared Co-MOF (ZIF-67) catalyst is of a dodecahedron structure, has uniform granules, and has relatively high catalysis oxidization activity at a temperature of 230 DEG C.

Description

technical field [0001] The invention relates to the preparation and application of a MOFs catalyst material, in particular to a novel preparation method and application of a Co-MOF catalyst. Background technique [0002] Air pollution is an important problem facing today's society. CO in the air is one of the most widely distributed and abundant pollutants in the atmosphere, so it is particularly important to effectively remove CO. At present, CO is usually removed by catalytic oxidation. There are two main categories of developed CO oxidation catalysts: noble metal catalysts and non-noble metal catalysts. Noble metal catalysts have good activity, but noble metal materials are scarce and expensive, which limits the large-scale application of such catalysts. Therefore, more and more researchers have begun to study non-noble metal catalysts, such as common metal oxides and composite oxides such as Cu, Mn, Co, Fe, and Ni. The research on non-noble metal catalysts with Cu and...

AI Technical Summary

Problems solved by technology

Although this method has simple equipment, its reaction time is long, it needs to be carried out under certain temperature and pressure, and metal salt anion impurities are introduced, which limits the application of this method

The liquid phase diffusion method is easy to obtain high-quality crystals, but the reaction is time-consuming and requires the reactants to have good solubility at room temperature

The microwave radiation synthesis method can promote the nucleation rate and crystal growth rate of MOF, and the reaction time is short, but once the optimal reaction time is exceeded, the quality of the obtained product will decline

Although the stirring method is simple to operate, it will introduce metal salt anions like the hydrothermal method

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