Effect of Nickel on CO Conversion Over Cordierite-Supported Bi-Metallic Pd-Ni Catalysts

This study focused on the preparation and characterization of Pd-Ni bimetallic catalysts supported on cerium-coated cordierite for carbon monoxide oxidation in a batch system. Using techniques such as XRD, FTIR, SEM/EDS, and BET, we confirmed successful metal loading and strong interactions between the metals and the support. The BET results showed that catalysts with balanced Pd and Ni ratios, especially Ni50, had larger surface areas, likely due to synergistic effects. Catalytic tests carried out at 300 °C demonstrated that these bimetallic catalysts performed nearly as well as the pure Pd catalyst in converting CO, while also benefiting from the inherent activity of the cerium-coated support. Overall, this study suggests that combining Pd with Ni can reduce the amount of precious metal needed without sacrificing efficiency, pointing to a more cost-effective solution for emission control applications.