Supported noble metal catalysts with performance of resisting high-temperature sintering and preparing method thereof

A noble metal catalyst, sintering performance technology, applied in the field of catalysis, can solve the problem of deactivation of supported noble metal catalysts
CN108452809AActive Publication Date: 2018-08-28CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2018-08-28

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Abstract

The invention provides a supported noble metal catalyst with the performance of resisting high-temperature sintering and a preparing method thereof, and belongs to the technical field of catalysis. The supported noble metal catalyst comprises a second carrier, first carriers dispersed on the surface of the second carrier, a spinel stabilizer Mal2O4 located between the first carrier layer and the second carrier layer, active components dispersed on the surfaces of the first carriers and a silicon dioxide coating layer coating the surface of the second carrier; the second carrier is Al2O3, doping vario-property Al2O3 or hexaaluminate; the first carriers are nano particles of TiO2, CeO2, ZrO2, CexZr(1-x)O2 or modified CexZr(1-x)O2; the active components are noble metal Au, Pt, Pd, Rh, Ir or Ru. The invention further provides a preparing method of the supported noble metal catalyst with the performance of resisting high-temperature sintering. The supported noble metal catalyst can still maintain a high catalytic activity after being subjected to heat treatment under the condition of 800 DEG C to 1,100 DEG C.
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Description

technical field

[0001] The invention belongs to the technical field of catalysis, and in particular relates to a supported noble metal catalyst with high temperature sintering resistance and a preparation method thereof. Background technique

[0002] Supported noble metal catalysts are widely used in many fields such as the elimination of volatile organic pollutants, petroleum refining, and automobile exhaust purification due to their excellent catalytic performance. Although noble metal nanoparticles show excellent catalytic performance and unique size effect in many reactions, due to the presence of a large number of low-coordination metal atoms on the surface of small-sized nanoparticles, they have high surface energy, so nanoparticles can It is very easy to sinter and grow, which leads to the reduction of the catalytic activity of the catalyst or the selectivity of the target product. Therefore, the commercial application of supported noble metal catalysts for high-temp...

Claims

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