Microwave assisted growth of stannous ferrite microcubes as electrodes for potentiometric nonenzymatic H2O2 sensor and supercapacitor applications

- Facile microwave approach is employed for synthesizing SnFe2O4 microcubes.
- SnFe2O4 electrodes exhibited excellent supercapacitor and H2O2 sensing performance.
- Specific capacitance of SnFe2O4 electrodes was three times higher than Fe2O3.
- Lower limit of H2O2 detection and sensitivity: 41 nM and 2.7 mV μM−1 μg−1.
- SnFe2O4 microcubes are excellent materials for electrochemical applications

Electrochemical sensors and supercapacitors are two noteworthy applications of electrochemistry. Herein, we report the synthesis of SnFe2O4 microcubes and Fe2O3 nanorods through a facile microwave assisted technique which are employed in fabricating the electrodes for nonenzymatic hydrogen peroxide (H2O2) sensor and supercapacitor applications. SnFe2O4 microcubes exhibited an enhanced specific capacitance of 172 Fg−1 at a scan rate of 5 mVs−1 in comparison to Fe2O3 nanorods (70 Fg−1). Furthermore, the H2O2 sensing performance of the fabricated SnFe2O4 electrodes through chronopotentiometry studies in 0.1 M PBS solution (at pH 7) with a wide linear range revealed a good sensitivity of 2.7 mV μM−1 μg−1 with a lowest detection limit of 41 nM at a signal-to-noise ratio of 3. These results indicate that SnFe2O4 microcubes are excellent materials for the cost effective design and development of efficient supercapacitors as well as nonenzymatic sensors.

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