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.