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<p>Addressing the growing demand for high-performance energy solutions, this work introduces a hydrothermally synthesized UIO-66/NH₂/Fe₂O₃ composite that combines the structural resilience of a zirconium-based metal-organic framework with the electrochemical richness of iron oxide. The specific novelty lies in the in-situ growth strategy that leverages the amino functionality of UIO-66/NH₂ to anchor Fe₂O₃ nanoparticles, creating an intimately coupled heterojunction with enhanced interfacial charge transfer. This work reports in-situ UiO‑66‑NH₂/Fe₂O₃ heterojunction with dual high-performance supercapacitor and HER functionality, enabled by synergistic electron transfer and ion diffusion. The synergy between the Fe₂O₃ component’s redox activity and the MOF’s stable porous network yields an electrode material with exceptional charge storage capabilities, evidenced by a remarkable specific capacity of 1632.48&#xa0;C/g at 1&#xa0;A/g. When conFig. d as the positive electrode in an asymmetric supercapacitor (ASC) paired with an activated carbon (AC) negative electrode, the device achieves a compelling balance of power and energy. It delivers a specific capacity of 252&#xa0;C/g at 1&#xa0;A/g, along with a maximum energy density of 89 Wh/kg and a power density of 1280&#xa0;W/kg. Beyond its impressive power metrics, the ASC exhibits superior longevity, retaining 90% of its capacity and operating with 96% Coulombic efficiency through 10,000 cycles. For alkaline HER electrocatalysis, the UIO-66/NH₂/Fe₂O₃ composite demonstrates high catalytic activity with a low overpotential of 95.83 mV at a geometric current density of 10&#xa0;mA cm⁻² and a favorable Tafel slope of 58.42 mV dec⁻¹. This work not only demonstrates a facile route to a high-performance composite but also positions UIO-66/NH₂/Fe₂O₃ as a transformative dual-purpose material for the next generation of asymmetric supercapacitors and alkaline hydrogen production electrocatalysis.</p>

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A Dual-Purpose Electrode Designed with UiO-66/NH2/Fe2O3 for Asymmetric Supercapacitor Energy Storage and Alkaline Hydrogen Production

  • 期刊论文

  • 发表日期：

    2026年4月27日

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  • O. Madkhali

摘要

Addressing the growing demand for high-performance energy solutions, this work introduces a hydrothermally synthesized UIO-66/NH₂/Fe₂O₃ composite that combines the structural resilience of a zirconium-based metal-organic framework with the electrochemical richness of iron oxide. The specific novelty lies in the in-situ growth strategy that leverages the amino functionality of UIO-66/NH₂ to anchor Fe₂O₃ nanoparticles, creating an intimately coupled heterojunction with enhanced interfacial charge transfer. This work reports in-situ UiO‑66‑NH₂/Fe₂O₃ heterojunction with dual high-performance supercapacitor and HER functionality, enabled by synergistic electron transfer and ion diffusion. The synergy between the Fe₂O₃ component’s redox activity and the MOF’s stable porous network yields an electrode material with exceptional charge storage capabilities, evidenced by a remarkable specific capacity of 1632.48 C/g at 1 A/g. When conFig. d as the positive electrode in an asymmetric supercapacitor (ASC) paired with an activated carbon (AC) negative electrode, the device achieves a compelling balance of power and energy. It delivers a specific capacity of 252 C/g at 1 A/g, along with a maximum energy density of 89 Wh/kg and a power density of 1280 W/kg. Beyond its impressive power metrics, the ASC exhibits superior longevity, retaining 90% of its capacity and operating with 96% Coulombic efficiency through 10,000 cycles. For alkaline HER electrocatalysis, the UIO-66/NH₂/Fe₂O₃ composite demonstrates high catalytic activity with a low overpotential of 95.83 mV at a geometric current density of 10 mA cm⁻² and a favorable Tafel slope of 58.42 mV dec⁻¹. This work not only demonstrates a facile route to a high-performance composite but also positions UIO-66/NH₂/Fe₂O₃ as a transformative dual-purpose material for the next generation of asymmetric supercapacitors and alkaline hydrogen production electrocatalysis.