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<p>The anodic oxygen evolution reaction (OER) poses a formidable kinetic bottleneck in electrochemical energy conversion. Here, we present three-dimensional porous CuNiCoIrRu high-entropy alloy aerogel synthesized via a facile one-pot co-reduction route. By synergizing compositional complexity with an interconnected conductive network, the catalyst achieves an ultralow overpotential of 203&#xa0;mV at 10&#xa0;mA&#xa0;cm<sup>−2</sup> in alkaline environment, along with a mass activity 176 and 16.1 times higher than IrO<sub>2</sub> and RuO<sub>2</sub>, respectively. In a full water-splitting cell paired with Pt/C, it requires a lower cell voltage than IrO<sub>2</sub>- or RuO<sub>2</sub>-based counterparts. The as-synthesized catalyst also demonstrates outstanding stability over 80000&#xa0;s, offering a promising high-performance, durable OER electrocatalyst for sustainable energy conversion systems.</p>

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A robust CuNiCoIrRu high-entropy alloy aerogel as a superior electrocatalyst for alkaline water oxidation

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Su Yan,
  • Lin Guan,
  • Yangguang Zhu,
  • Xiao Wang,
  • Gang Ao,
  • Da Zhang,
  • Lijin Xu

摘要

The anodic oxygen evolution reaction (OER) poses a formidable kinetic bottleneck in electrochemical energy conversion. Here, we present three-dimensional porous CuNiCoIrRu high-entropy alloy aerogel synthesized via a facile one-pot co-reduction route. By synergizing compositional complexity with an interconnected conductive network, the catalyst achieves an ultralow overpotential of 203 mV at 10 mA cm−2 in alkaline environment, along with a mass activity 176 and 16.1 times higher than IrO2 and RuO2, respectively. In a full water-splitting cell paired with Pt/C, it requires a lower cell voltage than IrO2- or RuO2-based counterparts. The as-synthesized catalyst also demonstrates outstanding stability over 80000 s, offering a promising high-performance, durable OER electrocatalyst for sustainable energy conversion systems.