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<p>The production of hydrogen as a clean energy source through water splitting is one of the essential steps to deal with the problems of global warming. Here, we present a novel approach utilizing iron (Fe) screw pitch cylindrical electrodes coated with cobalt titanate (CoTiO<sub>3</sub>) perovskite nanoparticles, which was synthesized using a microwave-assisted wet chemical method. The Fe screw pitch of electrode mitigates bubble accumulation on electrode surfaces due to the sharp edges. Hence, electro-catalytic activity is enhanced by using coated CoTiO<sub>3</sub> nanoparticles on its electrode surface. Notably, low overpotentials of 66&#xa0;mV and 77&#xa0;mV are required for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, to achieve a current density of 10&#xa0;mA/cm<sup>2</sup>, and low Tafel slopes of 34.81&#xa0;mV/dec and 31.73&#xa0;mV/dec are obtained for HER and OER, respectively. Impressively, a hydrogen conversion efficiency of 61.27% is obtained over 500&#xa0;h of electrochemical water splitting with minimal fluctuation (± 5%). These findings demonstrate a promising avenue for the mass production of hydrogen energy, using earth available materials, and assure high current density and long-term durability for industrial applications.</p>

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Enhancement of hydrogen and oxygen evolution through durable water splitting using CoTiO3 perovskite as a bifunctional electrocatalyst

  • 期刊论文

  • 发表日期：

    2025年2月11日

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  • Suhriday Barman,
  • Partha Pratim Sahu

摘要

The production of hydrogen as a clean energy source through water splitting is one of the essential steps to deal with the problems of global warming. Here, we present a novel approach utilizing iron (Fe) screw pitch cylindrical electrodes coated with cobalt titanate (CoTiO3) perovskite nanoparticles, which was synthesized using a microwave-assisted wet chemical method. The Fe screw pitch of electrode mitigates bubble accumulation on electrode surfaces due to the sharp edges. Hence, electro-catalytic activity is enhanced by using coated CoTiO3 nanoparticles on its electrode surface. Notably, low overpotentials of 66 mV and 77 mV are required for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, to achieve a current density of 10 mA/cm2, and low Tafel slopes of 34.81 mV/dec and 31.73 mV/dec are obtained for HER and OER, respectively. Impressively, a hydrogen conversion efficiency of 61.27% is obtained over 500 h of electrochemical water splitting with minimal fluctuation (± 5%). These findings demonstrate a promising avenue for the mass production of hydrogen energy, using earth available materials, and assure high current density and long-term durability for industrial applications.