Invention Grant
- Patent Title: Methodology for the effective stabilization of tin-oxide-based oxidation/reduction catalysts
- Patent Title (中): 用于氧化锡基氧化还原催化剂有效稳定的方法
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Application No.: US10956515Application Date: 2004-09-28
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Publication No.: US07985709B2Publication Date: 2011-07-26
- Inventor: Jeffrey D. Jordan , David R. Schryer , Patricia P. Davis , Bradley D. Leighty , Anthony N. Watkins , Jacqueline L. Schryer , Donald M. Oglesby , Suresh T. Gulati , Jerry C. Summers
- Applicant: Jeffrey D. Jordan , David R. Schryer , Patricia P. Davis , Bradley D. Leighty , Anthony N. Watkins , Jacqueline L. Schryer , Donald M. Oglesby , Suresh T. Gulati , Jerry C. Summers
- Applicant Address: US DC Washington
- Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
- Current Assignee Address: US DC Washington
- Agent Andrea Z. Warmbier; Helen M. Galus
- Main IPC: B01J23/00
- IPC: B01J23/00 ; B01J21/00 ; B01J20/00

Abstract:
The invention described herein involves a novel approach to the production of oxidation/reduction catalytic systems. The present invention serves to stabilize the tin oxide reducible metal-oxide coating by co-incorporating at least another metal-oxide species, such as zirconium. In one embodiment, a third metal-oxide species is incorporated, selected from the group consisting of cerium, lanthanum, hafnium, and ruthenium. The incorporation of the additional metal oxide components serves to stabilize the active tin-oxide layer in the catalytic process during high-temperature operation in a reducing environment (e.g., automobile exhaust). Moreover, the additional metal oxides are active components due to their oxygen-retention capabilities. Together, these features provide a mechanism to extend the range of operation of the tin-oxide-based catalyst system for automotive applications, while maintaining the existing advantages.
Public/Granted literature
- US20050079115A1 Methodology for the effective stabilization of tin-oxide-based oxidation/reduction catalysts Public/Granted day:2005-04-14
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