Stability of Doped-Zirconia as Support Oxide for Copper-Manganese Zero-PGM Catalysts
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United States of America Patent
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app pub date -
Oct 1, 2015
filing date -
Oct 1, 2015
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Abstract
The present disclosure describes bulk powder Zero-PGM material compositions including a CuMn2O4 spinel structure supported on doped zirconia support oxides powders, including Ba, Sr, and Ti at different dopant loadings produced by different conventional synthetic methods. BET-surface area and XRD analysis are performed for a plurality of doped zirconia support oxides to compare the thermal stability, before and after deposition of Cu—Mn spinel. Additionally, bulk powder ZPGM catalyst compositions are subjected to a steady-state isothermal sweep test to determine NO conversion capabilities. The selected support oxide material compositions are capable of providing increased surface areas for improved thermal stability leading to a more effective utilization of ZPGM catalyst materials with enhanced NO conversion and improved thermal stability for TWC applications.
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