Abstract
Abstract Hydrogen peroxide (H2O2) sensing and oxygen reduction reaction (ORR) has considered to be a highly desirable in the areas of sensing and energy production. In recent years, researchers focus on the replacement of noble metal-based electrocatalyst used for the ORR and H2O2 sensing by low-cost materials. In this current work, we have synthesized carbon black supported LaMnO3 (LMO@C) via dry particle coating method and studied its electrocatalytic activity towards ORR and H2O2 sensing. The characterization of synthesized LMO@C was performed by using field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy techniques. Furthermore, the synergistic effect between LMO and carbon was established through electrochemical measurements. In case of ORR, our prepared LMO@C composite possess longer life-time (89.8%) than 20 wt% Pt/C (77.6%). In another case, this electrocatalyst (LMO@C) owns wide working range, low limits of detection and high sensitivity for the determination of H2O2. The experimental data of LMO@C towards the electrochemical sensing of H2O2 and ORR demonstrates its potential applications in the construction of sensors and energy generation devices.
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