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<p>Recent studies on the electrocatalytic oxygen transfer from water to organic compounds have gained significant attention due to their sustainability and selectivity. However, the direct coactivation of inert hydrocarbons and water typically requires high oxidation potentials, leading to oxygen evolution reactions and low Faradaic efficiencies. Herein, a Ni-activated tungsten-oxygen covalency anode is designed for the efficient oxygen transfer from water to benzylic C(sp<sup>3</sup>)–H bonds via a Ni-regulated interfacial water structure between the anode and electrolyte. Both experimental and theoretical results reveal the critical role of W–O covalency sites with Ni-heteroatoms for boosting efficient oxygen transfer via breaking the dense interfacial hydrogen bond network and inhibiting the undesired oxygen evolution reactions, facilitating the coactivation of oxygen species and C(sp<sup>3</sup>)–H bonds. Thus, a Faradaic efficiency of &gt; 56% in a water-involved system has been achieved. This work provides important insight into designing electrocatalytic systems for inert C–H oxidation.</p>

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Regulating interfacial water for oxygen transfer to benzylic C(sp3)–H bonds via Ni-activated tungsten-oxygen covalency

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月4日

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  • Bing-Liang Leng,
  • Xiu Lin,
  • Hou-Yan Dong,
  • Qi-Yuan Li,
  • Shi-Nan Zhang,
  • Jie-Sheng Chen,
  • Xin-Hao Li

摘要

Recent studies on the electrocatalytic oxygen transfer from water to organic compounds have gained significant attention due to their sustainability and selectivity. However, the direct coactivation of inert hydrocarbons and water typically requires high oxidation potentials, leading to oxygen evolution reactions and low Faradaic efficiencies. Herein, a Ni-activated tungsten-oxygen covalency anode is designed for the efficient oxygen transfer from water to benzylic C(sp3)–H bonds via a Ni-regulated interfacial water structure between the anode and electrolyte. Both experimental and theoretical results reveal the critical role of W–O covalency sites with Ni-heteroatoms for boosting efficient oxygen transfer via breaking the dense interfacial hydrogen bond network and inhibiting the undesired oxygen evolution reactions, facilitating the coactivation of oxygen species and C(sp3)–H bonds. Thus, a Faradaic efficiency of > 56% in a water-involved system has been achieved. This work provides important insight into designing electrocatalytic systems for inert C–H oxidation.