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<p>Hydrogen production via water splitting has emerged as a viable strategy to address environmental degradation and energy crises, offering a sustainable route to clean energy. ZnFe-layered double hydroxides (LDHs) are regarded as promising electrocatalysts for overall water splitting due to their high activity and stability, yet their practical application is limited by poor electrical conductivity. Herein, we fabricate sulfur-doped ZnFe-LDH (S-ZnFe-LDH) ultrathin nanosheets on nickel foam as a bifunctional electrocatalyst. The S-ZnFe-LDH electrode exhibits good performance, requiring overpotentials of only 245 mV for the oxygen evolution reaction (OER) at 50&#xa0;mA cm<sup>− 2</sup> and 142 mV for the hydrogen evolution reaction (HER) at 10&#xa0;mA cm<sup>− 2</sup>, along with good durability. When assembled into a two-electrode electrolyzer, it achieves 50&#xa0;mA cm<sup>− 2</sup> at a low cell voltage of 1.80&#xa0;V. In this work, Zn acts as a dynamically sacrificial species whose leaching kinetics are precisely regulated by S, creating and stabilizing catalytically vital cation vacancies. This S-induced stabilization effect effectively prevents the structural collapse typically associated with such cation leaching. This work provides a valuable reference for designing efficient electrocatalysts for integrated water splitting.</p> Graphical Abstract <p></p>

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S-doped ZnFe-LDH Catalyst as an Efficient Bifunctional Electrocatalyst for Overall Water Splitting

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Zhongxiao Chen,
  • Dan Wang,
  • Feiyu Wang,
  • Wenchang Wang,
  • Chunping Dong,
  • Yuyang Zhou,
  • Xueling Shan,
  • Zhidong Chen

摘要

Hydrogen production via water splitting has emerged as a viable strategy to address environmental degradation and energy crises, offering a sustainable route to clean energy. ZnFe-layered double hydroxides (LDHs) are regarded as promising electrocatalysts for overall water splitting due to their high activity and stability, yet their practical application is limited by poor electrical conductivity. Herein, we fabricate sulfur-doped ZnFe-LDH (S-ZnFe-LDH) ultrathin nanosheets on nickel foam as a bifunctional electrocatalyst. The S-ZnFe-LDH electrode exhibits good performance, requiring overpotentials of only 245 mV for the oxygen evolution reaction (OER) at 50 mA cm− 2 and 142 mV for the hydrogen evolution reaction (HER) at 10 mA cm− 2, along with good durability. When assembled into a two-electrode electrolyzer, it achieves 50 mA cm− 2 at a low cell voltage of 1.80 V. In this work, Zn acts as a dynamically sacrificial species whose leaching kinetics are precisely regulated by S, creating and stabilizing catalytically vital cation vacancies. This S-induced stabilization effect effectively prevents the structural collapse typically associated with such cation leaching. This work provides a valuable reference for designing efficient electrocatalysts for integrated water splitting.

Graphical Abstract