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<p>Rational tuning electronic configuration of CoO is important for accelerating sluggish oxygen evolution reaction (OER) kinetics. This work reports a simultaneous incorporation of highly electronegative fluorine (F) and high-valence molybdenum (Mo) into CoO nanoneedles (denoted as FMo-CoO). The dual-doping strategy boosts Co<sup>3+</sup> content and compressive strain, which strengthens Co—O bond covalency and enables a lattice-oxygen-mediated (LOM) pathway during OER catalysis. Concurrently, the nanoneedle morphology coupled with F/Mo co-doping synergistically enhances surface properties, granting FMo-CoO exceptional superhydrophilicity and superaerophobicity. As a result, FMo-CoO achieves outstanding OER performance in alkaline media, requiring only overpotential of 287 mV at 10 mA/cm<sup>2</sup>. This work provides a novel method to boost the OER performance of CoO by anion and cation ions doping.</p>

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F and Mo Co-doped CoO Nanoneedle Arrays for Enhanced Oxygen Evolution Activity

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Yujie Liang,
  • Jiaying Zhang,
  • Xinyu Lao,
  • Zichenlu Wang,
  • Hong Sun,
  • Jingjing Wang,
  • Yingying Zheng,
  • Jiaqi Pan,
  • Chaorong Li,
  • Jun Cao

摘要

Rational tuning electronic configuration of CoO is important for accelerating sluggish oxygen evolution reaction (OER) kinetics. This work reports a simultaneous incorporation of highly electronegative fluorine (F) and high-valence molybdenum (Mo) into CoO nanoneedles (denoted as FMo-CoO). The dual-doping strategy boosts Co3+ content and compressive strain, which strengthens Co—O bond covalency and enables a lattice-oxygen-mediated (LOM) pathway during OER catalysis. Concurrently, the nanoneedle morphology coupled with F/Mo co-doping synergistically enhances surface properties, granting FMo-CoO exceptional superhydrophilicity and superaerophobicity. As a result, FMo-CoO achieves outstanding OER performance in alkaline media, requiring only overpotential of 287 mV at 10 mA/cm2. This work provides a novel method to boost the OER performance of CoO by anion and cation ions doping.