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Exploring hydrogen evolution in perovskite LaFeO3 and composites with spinel ferrite CoFe2O4

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Abstract

Most of the world's hydrogen is now being produced by the gasification of coal and steam methane that produces hazardous gases like CO2, CO, etc. To find the green solution for hydrogen generation, the present work deals with the synthesis of eco-friendly catalyst based on perovskite oxides LaFeO3 (LFO) and spinel oxide CoFe2O4 (CFO) composites to drive hydrogen evolution reaction (HER). The effect of magnetic character on hydrogen evolution reaction (HER) activity has been evaluated in 0.5 M H2SO4. The composite samples show high catalytic activity with low onset potentials. They Tafel slope values at 10 mA/cm2 for LFO and LFO- CFO composites with 70:30 and 60:40 ratio are found to be 37.38, 41.74 and 77.14 mV dec−1. LFO shows efficient hydrogen production at small value of overpotential at a higher kinetic reaction rate. EIS reveals the kinetics of the catalyst with respect to the Tafel slope values. The anisotropy constant for LFO–CFO (60/40) sample is obtained to be 86 times higher than LFO. Thus, presented work provides not only an opportunity to better understand the catalytic mechanism, but also a guide HER activity through magnetic-compound.

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Acknowledgements

Jitesh Pani acknowledges Department of Science and Technology, Government of India for providing research grant under the INSPIRE fellowship (IF200298). HB acknowledge for the financial support from Department of Science and Technology, New Delhi (SERB-DST (file no EEQ/2022/001055; through Diary No./Finance No. RS-1129-GoI-SERB). JP, and HB would like to thanks the Director, NIT Warangal for his constant encouragement.

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  1. Manasa Velaga and Jitesh Pani contributed equally to this work.

Authors and Affiliations

  1. Department of Physics, School of Advanced Sciences, VIT-AP University, Beside AP Secretariat, Guntur, 522237, Andhra Pradesh, India

    Manasa Velaga & B. Manmadha Rao

  2. Department of Physics, National Institute of Technology, Warangal, Telangana, 506004, India

    Jitesh Pani & Hitesh Borkar

  3. Department of Physics, Amolakchand Mahavidyalaya, Yavatmal, 445001, Maharashtra, India

    Vishwajit M. Gaikwad

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MV—Conceptualization, Experimental Findings, Methodology, Data curation. MV and JP—Writing, data curation, original draft. BMR—Validation, Review data curation, resources, review and editing. VMG—Visualization and data curation magnetic characterization. HB—reviewed and edited manuscript resources project administration.

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Velaga, M., Pani, J., Rao, B.M. et al. Exploring hydrogen evolution in perovskite LaFeO3 and composites with spinel ferrite CoFe2O4. J Mater Sci: Mater Electron 35, 980 (2024). https://doi.org/10.1007/s10854-024-12719-w

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