(769g) Designed Synthesis of Co3O4 Total Oxidation Catalysts
In our work, a statistical design and analysis platform was used to develop cobalt oxide based oxidation catalysts prepared via one pot metal salt reduction, a widely used and versatile synthesis technique. An emphasis was placed upon understanding the effects of synthesis conditions, such as heating regimen and Co2+ concentration on the metal salt reduction mechanism as well as the resultant nanomaterial properties, such as size, crystal structure, and crystal faceting. This was accomplished by carrying out XRD, TEM, and FTIR studies on synthesis intermediates and products. Additionally, high-throughput experimentation was employed to study and optimize the performance of Co3O4 oxidation catalysts over a wide range of synthesis and reaction conditions using a 16-channel fixed bed reactor equipped with a parallel infrared imaging system. Specifically, Co3O4 nanomaterials of varying properties were evaluated for their performance as CO oxidation and hydrocarbon oxidation catalysts. Figure-of-merits including light-off temperature, activation energy, and stability, which were measured and mapped back to the aforementioned catalyst properties and synthesis conditions. Statistical analysis methods were used to elucidate significant property-activity relationships as well as the design rules relevant in the synthesis of active catalysts.
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