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<p>Recent developments have brought the Nickel-Molybdenum oxide hybrid system into the spotlight as a scalable and earth-abundant functional oxide electrocatalyst for the hydrogen evolution reaction via electrochemical water splitting. Herein, we examine the photoelectrochemical activity of NiO/MoO<sub>2</sub> hybrid nanostructure as an in situ grown thin film on fluorine-doped tin oxide (FTO), using a facile hydrothermal method while varying the weight percentage (wt%) of Ni as a pioneering attempt. Our findings reveal a captivating behavior of NiO/MoO<sub>2</sub> hybrid with metallic characteristics, alongside an observed photocathodic response indicated by a negative photocurrent, attributed to the synergistic effect. Moreover, the as-synthesized NiO/MoO<sub>2</sub> hybrid, H<sub>2</sub>-annealed at 500ºC, achieved a fourfold improvement in average PEC performance from 5 µA/cm<sup>2</sup> to 20 µA/cm<sup>2</sup> compared to the NiO/MoO<sub>2</sub> hybrid/FTO under illumination. Overall, the result indicates Nickel oxide plausibly forming localized surface states, enabling light absorption without affecting the bulk properties.</p> Graphical Abstract <p></p>

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NiO/MoO2 hybrid nanostructure on rigid substrates with enhanced photocathodic properties

  • 期刊论文

  • 发表日期：

    2026年1月16日

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  • Anju P. Manoj,
  • Pravisha V. Pradeep,
  • Manish Verma,
  • Neena S. John,
  • Vivek Ramakrishnan

摘要

Recent developments have brought the Nickel-Molybdenum oxide hybrid system into the spotlight as a scalable and earth-abundant functional oxide electrocatalyst for the hydrogen evolution reaction via electrochemical water splitting. Herein, we examine the photoelectrochemical activity of NiO/MoO2 hybrid nanostructure as an in situ grown thin film on fluorine-doped tin oxide (FTO), using a facile hydrothermal method while varying the weight percentage (wt%) of Ni as a pioneering attempt. Our findings reveal a captivating behavior of NiO/MoO2 hybrid with metallic characteristics, alongside an observed photocathodic response indicated by a negative photocurrent, attributed to the synergistic effect. Moreover, the as-synthesized NiO/MoO2 hybrid, H2-annealed at 500ºC, achieved a fourfold improvement in average PEC performance from 5 µA/cm2 to 20 µA/cm2 compared to the NiO/MoO2 hybrid/FTO under illumination. Overall, the result indicates Nickel oxide plausibly forming localized surface states, enabling light absorption without affecting the bulk properties.

Graphical Abstract