Noble metal oxide catalyst, and preparation and application thereof

A technology of noble metal oxides and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, nitrous oxide capture, etc., can solve the problem that the catalyst has no activity, etc., and achieve the preparation method Simple and easy to implement, improve reaction efficiency, and maintain stable activity

Active Publication Date: 2015-09-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Noble metal oxide catalyst, and preparation and application thereof
  • Noble metal oxide catalyst, and preparation and application thereof
  • Noble metal oxide catalyst, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 5%RuO 2 / P25-TiO 2 Preparation of ruthenium oxide catalyst:

[0037] At room temperature, measure RuCl 3 Solution (30.91gRu / L) 2.55mL, NaOH solution (1mol / L) was added dropwise to adjust the pH value of the solution to 3, and then 1.5009g P25-TiO 2 Pour in the carrier, continue to stir for 4 hours, let it stand for aging for 6 hours, dry it at 110°C for 10 hours after fully washing, and finally roast it in air at 300°C for 4 hours to obtain 5% RuO 2 / P25-TiO 2 Ruthenium oxide finished catalyst;

Embodiment 2

[0039] 20%RuO 2 / P25-TiO 2 Preparation of ruthenium oxide catalyst:

[0040] Measure RuCl 3 Solution (30.91gRu / L) 12.1mL, placed in a 60°C water bath, NaOH solution (3mol / L) was added dropwise to adjust the pH value of the solution to 4, and then 1.501gP25-TiO 2 Pour the carrier into the mixture, continue to stir for 6 hours, let it stand for aging for 6 hours, wash it thoroughly, dry it at 110°C for 8 hours, and finally roast it at 300°C for 4 hours in a 10% oxygen / nitrogen mixture to obtain 20% RuO 2 / P25-TiO 2 Ruthenium oxide finished catalyst;

Embodiment 3

[0042] 15%IrO 2 / P25-TiO 2 Preparation of iridium oxide catalyst:

[0043] Measure H 2 IrCl 6 Solution (Ir weight fraction 19.8wt.%) 0.8913g, NaOH solution (3mol / L) was added dropwise to adjust the pH value of the solution to 5, and then 1.001g P25-TiO 2 Pour in the carrier, continue to stir for 8 hours, let stand for aging for 6 hours, dry at 110°C for 12 hours after fully washing, and finally roast at 500°C for 4 hours in a 10% oxygen / argon gas mixture to obtain 15% IrO 2 / P25-TiO 2 Iridium oxide finished catalyst;

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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...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01D53/86B01D53/56
CPCY02C20/10
Inventor 黄延强林清泉李林王爱琴张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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