Noble metal oxide catalyst, and preparation and application thereof

Abstract

The invention relates to preparation and an application of a high-activity noble metal oxide catalyst. Active components of the catalyst comprise oxides of noble metals Ru, Ir and Rh, and a carrier is TiO2 or TiO2 modified SiO2, Al2O3, SnO2 cheap oxides. Through adjusting and changing the composition of different crystal forms of TiO2, strong interaction of the active noble metal oxides and TiO2 is improved, the dispersion degree of the noble metal oxides is significantly improved, and thus high-dispersion noble metal oxide catalyst with TiO2 or the TiO2 modified cheap oxides as the carrier is obtained. The method has the advantages of simple and easy implementation, convenient industrial production, extremely good repeatability and the like; prepared noble metal oxide particles are smaller in particle diameter and uniform in size. The catalyst has lower initial reaction temperature and high reaction stability in an N2O decomposition reaction, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a TiO 2 or TiO 2 The invention discloses a preparation method of a modified cheap oxide-loaded nano-noble metal oxide catalyst, using noble metal oxides (ruthenium oxide, iridium oxide, rhodium oxide) as active components, and applying it to the decomposition reaction of nitrous oxide. Background technique [0002] Nitrous oxide (N 2 O) is a major greenhouse gas, which has caused great damage to the environment on which human beings depend. Therefore, it is necessary to seek to effectively eliminate N in the atmosphere. 2 O has attracted great attention from scientists; and, N 2 O can be used as a new type of green propellant, and its superior performance has aroused great interest of scientists in the aerospace field. Therefore, in the past few decades, scientists have done a lot of research work, until now, the research and development of decomposed N 2 Highly...

AI Technical Summary

Problems solved by technology

Although our research group reported that H 2 Ir / TiO prepared by high temperature reduction 2 / Al 2 o 3 Catalyst (CN201010522923.5), the active component of which is metallic Ir and the catalyst has no activity at temperatures below 250°C

So far, noble metal oxides (ruthenium oxide, iridium oxide, rhodium oxide) have been used as active components loaded on TiO 2 or TiO 2 Modified cheap oxide composite support applied to N 2 O decomposition reaction has not been reported yet

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