“…Metal oxide nanoparticles have gained significant research interest due to their low cost, high sensitivity, light weight, large surface area, and fast electron transfer kinetics. 21,22 When strategically combined with other metals or metal oxides, metal oxide nanoparticles exhibit enhanced electro-catalytic performance, offering improved electronic interactions, electrochemical stability, and conductivity. 23 In this study, we synthesized a bimetallic oxide nanocomposite of CeO 2 and ZrO 2 to exploit the synergistic effects and achieve enhanced electrocatalytic activity for picomolar-range CPH detection.…”