Bimetallic zeolitic imidazolate frameworks-derived bar-shaped structure for electrochemical determination of H2O2

Unique nanostructures of bimetallic materials derived from zeolitic imidazolate frameworks (ZIFs) are promising candidates for electrochemical sensor applications. In this study, different bimetallic bar-shaped ZIFs (B-ZIFs) were synthesized by replacing some cobalt ions with different metals ions (Ni 2+ , Ce 2+ , Cu 2+ , Mn 2+ , or Fe 3+ ). Then their derivatives were prepared via carbonization, respectively. Upon conducting thorough material characterizations and assessment of the electrochemical properties, the most suitable candidate for electrode modification was identified as bar-shaped Co/Cu-based carbon materials (B-Co/Cu/Cs). This choice facilitated the construction of an innovative electrochemical sensor tailored for the determination of H 2 O 2 . The furnished B-Co/Cu/Cs-based sensor showed good linearity for H 2 O 2 analysis within concentrations ranged from 0.5-4000 μM and 4000–11000 μM, with a detection limit of 0.44 μM. All these results suggested that the prepared material would be a competitive candidate for the non-enzymatic H 2 O 2 sensing.