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<p>Developing effective and structured nanomaterials with multifunctional applications has always been attractive in innumerable fields, especially in generating renewable energy and reducing environmental pollution. Here, the CeO<sub>2</sub> nanoparticles, developed through a simple, green, and cost-effective method, can be utilized as an efficient electrocatalyst for the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and the degradation of an antibiotic, ciprofloxacin. UV–vis spectroscopy, EDX, XPS, XRD, and TEM characterize the synthesized nanoparticles. The results showed that the synthesized nanoparticles of 16.09&#xa0;nm, with a band gap of 2.9&#xa0;eV, act as an efficient catalyst for ciprofloxacin removal, achieving 93.4% efficiency within 45&#xa0;min at a pH of 9.4. Also, the linear sweep voltammetry (LSV) measurements revealed that the electrocatalyst showed a superior performance toward OER and HER, with overpotentials of 396&#xa0;mV and 312&#xa0;mV, with Tafel slopes of 156.75 mVdec<sup>−1</sup> and 98.04 mVdec<sup>−1</sup>, respectively.</p> Graphical abstract <p></p>

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Investigation on catalytic OER/HER performance and degradation behavior using biosynthesized CeO2 nanoparticles

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • V. N. Anjana,
  • Majo Joseph,
  • V. N. Archana,
  • Beena Mathew,
  • Ebey P. Koshy

摘要

Developing effective and structured nanomaterials with multifunctional applications has always been attractive in innumerable fields, especially in generating renewable energy and reducing environmental pollution. Here, the CeO2 nanoparticles, developed through a simple, green, and cost-effective method, can be utilized as an efficient electrocatalyst for the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and the degradation of an antibiotic, ciprofloxacin. UV–vis spectroscopy, EDX, XPS, XRD, and TEM characterize the synthesized nanoparticles. The results showed that the synthesized nanoparticles of 16.09 nm, with a band gap of 2.9 eV, act as an efficient catalyst for ciprofloxacin removal, achieving 93.4% efficiency within 45 min at a pH of 9.4. Also, the linear sweep voltammetry (LSV) measurements revealed that the electrocatalyst showed a superior performance toward OER and HER, with overpotentials of 396 mV and 312 mV, with Tafel slopes of 156.75 mVdec−1 and 98.04 mVdec−1, respectively.

Graphical abstract