A diesel oxidation catalyst and a preparation method and application thereof

By loading Pt onto CeO2 nanorods and controlling its coordination environment to form single-atom Pt species, the problems of high cost and insufficient durability of noble metal catalysts are solved, achieving efficient oxidation of CO and C3H6, and showing good potential for industrial application.

CN122298402APending Publication Date: 2026-06-30INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
Filing Date
2026-03-31
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing diesel engine exhaust gas treatment technologies, precious metal catalysts are expensive and lack durability and sulfur resistance in complex exhaust gas environments, making it difficult to effectively reduce the amount of precious metals used while maintaining catalytic activity.

Method used

CeO2 nanorods were used as a support, and Pt was loaded by impregnation. Tetraammineplatinum nitrate was used as a precursor to control the coordination environment of Pt, form single-atom Pt species, enhance the Pt-CeO2 interface interaction, and improve catalytic activity.

Benefits of technology

It achieves maximum utilization of precious metals, the catalyst exhibits excellent CO and C3H6 oxidation activity, the synthesis process is simple, and it has good prospects for industrial application.

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Abstract

This invention provides a diesel oxidation catalyst, its preparation method, and its application. The preparation method includes: impregnating a CeO2 support in a Pt-containing precursor solution; after impregnation, subjecting the solid product to a first calcination to obtain Pt / CeO2; the Pt-containing precursor solution includes platinum tetraamminenitrate and a solvent. This invention uses the noble metal Pt as the main active component and CeO2 nanorods as the support. Pt is loaded onto the CeO2 support using an impregnation method. By regulating the coordination environment of single-atom Pt through the noble metal precursor, the prepared catalyst exhibits excellent CO and C3H6 oxidation activity. Furthermore, the catalyst synthesis process is simple and maximizes the utilization of noble metal atoms, showing promising prospects for industrial application.
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