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Direct Visualization of Spinel-Like Rhodium Aluminate (RhAlOx) to Understand its Role in Rh/Al2O3-Based Three-Way Catalysts

Many long-debated scientific research questions remain ambiguous for decades due to the lack of direct visualization of the atomic structure in the material. Hence, fundamental mechanisms could only be partially revealed and understood due to limited information, e.g., provided by averaging and/or indirect characterization methods. With the advent of aberration-corrected scanning / transmission electron microscopy (STEM), direct atomic-resolution observation of complex material structures is now feasible [1].