Influence of Type of Support Oxide on Stability of Copper-Manganese Zero-PGM Catalyst
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United States of America Patent
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Issued Date -
Dec 10, 2015
app pub date -
Jun 5, 2014
filing date -
Jun 5, 2014
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Abandoned
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Abstract
Variations of metal oxide materials used as support oxide for Cu—Mn spinel powder for ZPGM TWC applications are disclosed. Bulk powder catalyst samples of Cu—Mn spinel structure on MgAl2O4, Al2O3-9% BaO, Al2O3—SrO, Al2O3—CeO, CeO2—ZrO2 support oxides and among others are prepared using incipient wetness method. BET-surface area analysis is performed for selected support oxides before and after deposition of Cu—Mn spinel to analyze thermal stability. XRD analysis is performed for bulk powder catalyst samples to investigate Cu—Mn spinel phase formation, and phase stability for a plurality of temperatures to about 1000° C. Activity measurements under isothermal steady state sweep test condition may be performed under rich condition to lean condition for different aging temperature at about 800° C. and about 1000° C. Catalytic activity of samples may be compared to analyze the influence that selected support oxides may have on thermal stability and TWC performance of ZPGM materials for a plurality of TWC applications.
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