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Biomimetic [AV-Er2O3-doped δ-Bi2O3]-stacked nanoplates: an efficient electrocatalyst for OER/HER and electrode material for supercapacitor application

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Abstract

Current investigation explores the role of the phyto-metabolites of the Amaranthus viridis for development of the energy-active nanocomplex. The green route adopted for synthesis of doped nanocomplexes signifies economic viability and ecological convivial. Biomimetically prepared nanoparticles synthesized in different doping concentrations exhibited bandgap in the range of 2.5 to 3.2 eV. Average crystallite sizes of 13.97, 19.64, 16.11, and 11.16 nm were determined through XRD for the doped concentrations of 2.5, 5, 7.5, and 10%, respectively. Synthesized doped nanoparticles exhibit porous sheet-like morphology. The synthesized material was then explored for HER and OER potential through linear sweep voltammetry and electrochemical impedance spectroscopy studies. Overpotential value of 154 mV was obtained for hydrogen evolution reaction and 445 mV for oxygen evolution reaction. Furthermore, highest capacitance of 287 F/g was obtained at 2 mV/s through cyclic voltammetry.

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Acknowledgements

The authors of this work are highly grateful to the Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, 46000, Rawalpindi, Pakistan, and the Queen Mary University of London, the United Kingdom for providing the technical facilities needed for the completion of this work. Also, the authors want to acknowledge the Higher Education Commission, Pakistan for resource provisioning. The authors extend their appreciation to Researchers Supporting Project number RSP2023R165, King Saud University, Riyadh, Saudi Arabia.

Funding

The Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, 46000, Rawalpindi, Pakistan, and the Higher Education Commission, Pakistan, provided the financial facilities needed for the completion of this work.

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Authors and Affiliations

  1. Materials and Environmental Chemistry Lab, Lab E-21, Department of Environmental Sciences, Fatima Jinnah Women University, The Mall, 46000, Rawalpindi, Pakistan

    Sundus Azhar, Khuram Shahzad Ahmad & Shaan Bibi Jaffri

  2. School of Biological & Chemical Sciences, Queen Mary University of London, London, UK

    Isaac Abrahams

  3. Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA

    Tenzin Ingsel & Ram K. Gupta

  4. Department of Zoology, College of Science, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia

    Daoud Ali

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Azhar, S., Ahmad, K.S., Abrahams, I. et al. Biomimetic [AV-Er2O3-doped δ-Bi2O3]-stacked nanoplates: an efficient electrocatalyst for OER/HER and electrode material for supercapacitor application. Ionics 29, 2485–2500 (2023). https://doi.org/10.1007/s11581-023-05002-1

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