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<p>This study introduces a high-performance electrode coated with MnO<sub>x</sub> compounds to enhance the HER reaction. The active and precipitated MnO<sub>x</sub> species facilitate interconnected electron transport throughout the Ti electrodes. The tailored MnO<sub>x</sub> electrodes exhibited a significant reduction in R<sub>ct</sub> (69.7%), superior C<sub>dl</sub> (31.6%), and a notably lower Nyquist ring compared to traditional Ti electrodes, confirming their excellent electrocatalytic performance in Cl<sup>−</sup> and NaCl production. Additionally, LSV and PDP analysis demonstrated that the MnO<sub>x</sub> electrodes achieved a 53.9% decrease in Tafel slopes (from 139&#xa0;mV/decade to 64&#xa0;mV/decade), lower activity potentials, and robust corrosion resistance (99.4%), indicating faster kinetics and higher efficiency. High-resolution FESEM and contact angle images revealed that the MnO<sub>x</sub> electrodes possess uniform porous networks and semi-super hydrophilic function, optimizing H<sub>2</sub> release and expanding the interfacial area for electron transfer. Finally, the Ti electrodes with advanced MnO<sub>x</sub> coatings can serve as reliable, cost-effective, and efficient candidates for use as regenerating electrodes in electrocatalytic industries. Moreover, the novel MnO<sub>x</sub>/rGO composites are versatile materials used as catalysts in chemical reactions, effective electrodes in energy storage devices, sensitive gas sensors, and for water treatment to remove contaminants.</p>

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Tailoring durable MnOx-based electrodes for high-performance electrocatalytic function for next-generation electrocatalysis applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月21日

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  • Hashem Tayeba,
  • Roya Kiani-Anbouhi,
  • Neda Royaei

摘要

This study introduces a high-performance electrode coated with MnOx compounds to enhance the HER reaction. The active and precipitated MnOx species facilitate interconnected electron transport throughout the Ti electrodes. The tailored MnOx electrodes exhibited a significant reduction in Rct (69.7%), superior Cdl (31.6%), and a notably lower Nyquist ring compared to traditional Ti electrodes, confirming their excellent electrocatalytic performance in Cl− and NaCl production. Additionally, LSV and PDP analysis demonstrated that the MnOx electrodes achieved a 53.9% decrease in Tafel slopes (from 139 mV/decade to 64 mV/decade), lower activity potentials, and robust corrosion resistance (99.4%), indicating faster kinetics and higher efficiency. High-resolution FESEM and contact angle images revealed that the MnOx electrodes possess uniform porous networks and semi-super hydrophilic function, optimizing H2 release and expanding the interfacial area for electron transfer. Finally, the Ti electrodes with advanced MnOx coatings can serve as reliable, cost-effective, and efficient candidates for use as regenerating electrodes in electrocatalytic industries. Moreover, the novel MnOx/rGO composites are versatile materials used as catalysts in chemical reactions, effective electrodes in energy storage devices, sensitive gas sensors, and for water treatment to remove contaminants.