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<p>Electrochemical water splitting stands out to be a productive and eco-friendly way to produce hydrogen from water with the usage of electrodes made of expensive noble metals as the only bottleneck for the complete utilization of this technology. To break this barrier, in our work, BaNi<sub>0.7</sub>Co<sub>0.3</sub>O<sub>3</sub>@NiFe LDH hierarchical heterostructure was synthesized via solution combustion method and studied for its adequacy as a HER electrocatalyst in electrochemical water splitting. The as-synthesized hierarchical heterostructure material showcased a very low overpotential of 241 mV @ -10&#xa0;mA cm<sup>− 2</sup>. A Tafel slope of 145 mVdec<sup>− 1</sup> and large ECSA of 1.11&#xa0;cm<sup>− 2</sup> for the hierarchical heterostructure signifies its accelerated reaction kinetics compare to its individual counterparts. BaNi<sub>0.7</sub>Co<sub>0.3</sub>O<sub>3</sub>@NiFe LDH hierarchical heterostructure was absolutely stable with zero degradation and showed improved HER activity by 20 mV @ -10&#xa0;mA cm<sup>− 2</sup> (220 mV) at the end of 24&#xa0;h continuous hydrogen production. The enhanced electrocatalytic activity accompanied by the change in morphology of the material into needle shaped nanostructures suggests that the hierarchical heterostructure can be a very promising cost effective HER electrode for alkaline water electrolysis.</p> Graphical abstract <p></p>

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Multi-active-site perovskite ceramic layered double hydroxides for high-performance hydrogen evolution in alkaline electrolysis

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Junita J,
  • Jayalakshmi D,
  • Deepapriya S,
  • John D Rodney,
  • Byung Chul Kim,
  • Jauhar RO. MU,
  • Ramalinga Viswanathan Mangalaraja,
  • Masashi Kato

摘要

Electrochemical water splitting stands out to be a productive and eco-friendly way to produce hydrogen from water with the usage of electrodes made of expensive noble metals as the only bottleneck for the complete utilization of this technology. To break this barrier, in our work, BaNi0.7Co0.3O3@NiFe LDH hierarchical heterostructure was synthesized via solution combustion method and studied for its adequacy as a HER electrocatalyst in electrochemical water splitting. The as-synthesized hierarchical heterostructure material showcased a very low overpotential of 241 mV @ -10 mA cm− 2. A Tafel slope of 145 mVdec− 1 and large ECSA of 1.11 cm− 2 for the hierarchical heterostructure signifies its accelerated reaction kinetics compare to its individual counterparts. BaNi0.7Co0.3O3@NiFe LDH hierarchical heterostructure was absolutely stable with zero degradation and showed improved HER activity by 20 mV @ -10 mA cm− 2 (220 mV) at the end of 24 h continuous hydrogen production. The enhanced electrocatalytic activity accompanied by the change in morphology of the material into needle shaped nanostructures suggests that the hierarchical heterostructure can be a very promising cost effective HER electrode for alkaline water electrolysis.

Graphical abstract