Metal-organic framework derived Co/Co3O4/carbon composite as a sensing platform for the detection of H2O2

Metal-organic frameworks (MOFs), with a particular focus on zeolite-imidazole frameworks (ZIFs), have garnered significant interest as potential templates for the fabrication of sensing materials. In this work, we fabricated a porous stick structure of S-Co 3 O 4 /Co/C through the two-step pyrolysis of stick-like ZIF-67 (ZIF-S). Various methodologies were utilized to investigate the structures and composition of the nanocomposites. The S-Co 3 O 4 /Co/C was further utilized as electrode components in electrocatalytic determination of H 2 O 2 . Thanks to the unique stick-like structure and the synergistic effects of Co 3 O 4 , Co, and carbon, the fabricated sensor showed wide linear range (0.5–4000; 4000–11,000 μM), high sensitivity (1.01; 0.90 μA μM −1 cm −2 ) and low detection limit (0.29 μM) for H 2 O 2 sensing. The study being presented is anticipated to offer a novel outlook on the possible utility of nanocomposites derived from MOFs in the realm of electrochemical sensing.