A web of poly(bisbenzimidazolatocopper(II)) around multiwalled carbon nanotubes for the electrochemical detection of hydrogen peroxide

The present work focuses on the electrochemical determination of hydrogen peroxide (H2O2), using a poly(bisbenzimidazolatocopper(II)) coordinated multiwalled carbon nanotube modified glassy carbon electrode (MWCNT/(BIM-Cu2+)n@GCE). The physical characterization techniques point to the coordination of the polymer web around the MWCNT. The electrode matrix developed was employed for the electrochemical estimation of H2O2. The polymer works better in the presence of MWCNT as it acts as conducting spokes, which is seminal for the successful electrochemical sensing of H2O2. To the best of our knowledge, this type of coordination polymer web sensing peroxide is reported for the first time. In the amperometric sensing, the electrode exhibited an H2O2 detection limit of 7.8×10-7 M and a sensitivity of 5 nA/μM. The effectiveness of the electrode was further proved via interference study and applying to H2O2 sensing in real samples.