A new MWCNT–Fe<sub>2sub>O<sub>3sub>–Prussian blue hybrid electrode is developed.
Improved in electroanalytical performance over the conventionally prepared PB systems.
Synergistic effect of Fe<sub>2sub>O<sub>3sub>, MWCNT and PB was noticed.
Used as a selective sensor to detect H<sub>2sub>O<sub>2sub> in milk, cosmetic and clinical samples.