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<p>In the realm of innovative materials for sustainable energy applications, the synergistic integration of metal oxides has the potential to revolutionize catalytic processes. In the pursuit of effective energy conversion, this study meticulously fabricated and evaluated binary ZrO<sub>2</sub>–Co<sub>3</sub>O<sub>4</sub> oxides in different ratios (Zr<sub><i>y</i></sub>:Co<sub>1−<i>y</i></sub> where <i>y</i> = 0.1, 0.3, 0.7, 0.9) for electrocatalytic water oxidation. Through comprehensive characterization and electrochemical studies, the excellent activity of the optimized Zr<sub>0.1</sub>:Co<sub>0.9</sub> oxide catalyst was uncovered. Our findings revealed that this composite exhibited a high current density of 658&#xa0;mA&#xa0;cm<sup>−2</sup> at a potential of 1.76&#xa0;V vs. RHE. This robust catalyst demonstrated an overpotential of 260&#xa0;mV to achieve a current density of 10&#xa0;mA&#xa0;cm<sup>−2</sup>. Moreover high stability of catalyst was evident even after 48&#xa0;h. The optimized catalysts with low zirconium content provided better active sites for enhanced efficiency. This research highlighted the synergistic effect of these metal oxides, offered significant potential for developing high-performance catalysts for water oxidation.</p> Graphical abstract <p></p>

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Revolutionizing electrocatalytic synergy: optimized ZrO2–Co3O4 composites for high-efficiency oxygen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Alvera Mahnoor,
  • Fareeha Marriam,
  • Khadija Munawar,
  • Khurram Shahzad Munawar,
  • Muhammad Adeel Asghar,
  • Javed Iqbal,
  • Ali Haider,
  • Syed Mustansar Abbas,
  • Muhammad Adil Mansoor

摘要

In the realm of innovative materials for sustainable energy applications, the synergistic integration of metal oxides has the potential to revolutionize catalytic processes. In the pursuit of effective energy conversion, this study meticulously fabricated and evaluated binary ZrO2–Co3O4 oxides in different ratios (Zry:Co1−y where y = 0.1, 0.3, 0.7, 0.9) for electrocatalytic water oxidation. Through comprehensive characterization and electrochemical studies, the excellent activity of the optimized Zr0.1:Co0.9 oxide catalyst was uncovered. Our findings revealed that this composite exhibited a high current density of 658 mA cm−2 at a potential of 1.76 V vs. RHE. This robust catalyst demonstrated an overpotential of 260 mV to achieve a current density of 10 mA cm−2. Moreover high stability of catalyst was evident even after 48 h. The optimized catalysts with low zirconium content provided better active sites for enhanced efficiency. This research highlighted the synergistic effect of these metal oxides, offered significant potential for developing high-performance catalysts for water oxidation.

Graphical abstract