Simultaneous NO and CO Removal through Bimetallic Redox Pairs Composed of Mesoporous Indium Oxide

Designing new catalytic materials with bi- or trimetallic cores for higher catalytic performance is a key aspect of current research. The current research describes the effect of an indium-based composite catalyst, synthesized through the glycine combustion route, for the conversion of toxic CO and NO into nontoxic ones. Among the prepared materials, the cobalt–copper-composed indium oxide catalyst exhibited the highest performance in detoxifying CO and NO. The notable improvement in the redox nature of the mesoporous catalyst displayed the CO–O₂ conversion at 160 °C and NO–CO conversion at 220 °C, respectively. The insertion of Co along with Cu tends to enhance the redox pair as attributed to the synergistic interplay among Co^2+/3+–Cu^1+/2+, as evidenced through the TPR profile. The presented trimetallic core of indium, copper, and cobalt facilitates high surface properties, highlighting the importance of precise effectiveness in catalyst design in NO and CO conversion.