Phase Stability of Copper-Manganese Spinel Oxide within a Mixture of Metal Oxides

摘要

The present disclosure describes ZPGM material compositions including a CuMn2O4 spinel structure mixed with a plurality of support oxide powders to develop suitable ZPGM catalyst materials. Bulk powder ZPGM catalyst compositions are produced by physically mixing bulk powder CuMn2O4 spinel with different support oxide powders calcined at about 1000° C. XRD analyses are performed for bulk powder ZPGM catalyst compositions to determine Cu—Mn spinel phase formation and phase stability for a plurality of temperatures to about 1000° C. ZPGM catalyst material compositions including CuMn2O4 spinel mixed with La2O3, cordierite, and ceria-zirconia support oxides exhibit phase stability, which can be employed in ZPGM catalysts for a plurality of TWC applications, thereby leading to a more effective utilization of ZPGM catalyst materials with high thermal and chemical stability in TWC products.

主权项

1. A composition comprising a catalyst comprising CuMn2O4 spinel and an oxide powder selected from the group consisting of Nb2O5, SrO, BaO, La2O3, CeO2—ZrO2, cordierite, and mixtures thereof.