NON-COPPER BINARY SPINELS FOR TWC AND THEIR OXYGEN STORAGE CAPACITY

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Zero-Rare Earth Metal (ZREM) and Zero-platinum group metals (ZPGM) compositions of varied binary spinel oxides are disclosed as oxygen storage material (OSM) to be used within TWC systems. The ZREM-ZPGM OSM systems comprise binary non-Cu spinel oxides of Co-Fe, Fe-Mn, Co-Mn, or Mn-Fe such as Co0.2Fe2.8O4, FeMn2O4, CoMn2O4, and Mn0.5Fe2.5O4. The oxygen storage capacity (OSC) property associated with the non-Cu ZREM-ZPGM OSM systems is determined employing isothermal OSC oscillating condition testing. Further, the OSC test results compare the OSC properties of a ZREM-ZPGM reference OSM system including a Cu-Mn binary spinel oxide and PGM reference catalysts including Ce-based OSMs. The non-Cu spinel oxides ZREM-ZPGM OSM systems exhibit significantly improved OSC properties compared to Ce-based OSM PGM reference systems.