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<p>Developing ruthenium-based oxide catalysts capable of suppressing lattice oxygen participation in the catalytic reaction process is crucial for maintaining stable oxygen evolution reaction (OER) under acidic conditions. Herein, we delicately construct a RuO<sub>2</sub> nanoparticle-anchored LiCoO<sub>2</sub> nanosheet electrocatalyst (RuO<sub>2</sub>/LiCoO<sub>2</sub>), achieving dynamic optimization of RuO<sub>2</sub> during the reaction process and improving catalytic stability. Benefiting from the unique electrochemical delithiation characteristics of the LiCoO<sub>2</sub> support, the covalency of the Ru-O bond is effectively regulated during the OER process. The weakened Ru-O covalent bond inhibits the participation of lattice oxygen in the catalytic reaction and ensures the continuous operation of the Ru active sites. Moreover, the extended Ru-O bond in the optimized RuO<sub>2</sub>/LiCoO<sub>2</sub> catalyst reduces the formation energy barrier of the *OOH intermediates, accelerating the progress of the OER. As a result, the RuO<sub>2</sub>/LiCoO<sub>2</sub> catalyst requires only an overpotential of 150 ± 2 mV at 10 mA cm<sup>−2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub> and operates stably for 2000 h at 1 A cm<sup>−2</sup> in a proton exchange membrane water electrolysis. This work opens new avenues for designing efficient ruthenium-based catalysts.</p>

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Modulating the covalency of Ru-O bonds by dynamic reconstruction for efficient acidic oxygen evolution

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月13日

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  • Luqi Wang,
  • Sung-Fu Hung,
  • Sheng Zhao,
  • Yue Wang,
  • Suwan Bi,
  • Shaoxiong Li,
  • Jian-Jie Ma,
  • Chenchen Zhang,
  • Ying Zhang,
  • Linlin Li,
  • Tsung-Yi Chen,
  • Han-Yi Chen,
  • Feng Hu,
  • Yuping Wu,
  • Shengjie Peng

摘要

Developing ruthenium-based oxide catalysts capable of suppressing lattice oxygen participation in the catalytic reaction process is crucial for maintaining stable oxygen evolution reaction (OER) under acidic conditions. Herein, we delicately construct a RuO2 nanoparticle-anchored LiCoO2 nanosheet electrocatalyst (RuO2/LiCoO2), achieving dynamic optimization of RuO2 during the reaction process and improving catalytic stability. Benefiting from the unique electrochemical delithiation characteristics of the LiCoO2 support, the covalency of the Ru-O bond is effectively regulated during the OER process. The weakened Ru-O covalent bond inhibits the participation of lattice oxygen in the catalytic reaction and ensures the continuous operation of the Ru active sites. Moreover, the extended Ru-O bond in the optimized RuO2/LiCoO2 catalyst reduces the formation energy barrier of the *OOH intermediates, accelerating the progress of the OER. As a result, the RuO2/LiCoO2 catalyst requires only an overpotential of 150 ± 2 mV at 10 mA cm−2 in 0.5 M H2SO4 and operates stably for 2000 h at 1 A cm−2 in a proton exchange membrane water electrolysis. This work opens new avenues for designing efficient ruthenium-based catalysts.