Hydrogen peroxide biosensor based on microperoxidase-11 immobilized in a silica cavity array electrode

► Hydrogen peroxide biosensor based on silica cavity array electrode was constructed. ► The electron transfer of MP-11 was investigated through electrochemical method. ► The linear range for Hydrogen peroxide determination was from 2×10−6 to 6×10−4 M. ► The detection limit was 4×10−7 M.