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<p>Heterogeneous single-atom systems demonstrate potential to break performance limitations of single-atom catalysts through synergy interactions. The synergy in heterogeneous single atoms strongly dependes on their anchoring sites. Herein, we reveal the site-specific synergy in heterogeneous single atoms for oxygen evolution. The Ru<sub>T</sub>Ir<sub>V</sub>/CoOOH is fabricated by anchoring Ru single atoms onto three-fold facial center cubic hollow sites and Ir single atoms onto oxygen vacancy sites on CoOOH. Moreover, Ir<sub>T</sub>Ru<sub>V</sub>/CoOOH is also prepared by switching the anchoring sites of single atoms. Electrochemical measurements demonstrate the Ru<sub>T</sub>Ir<sub>V</sub>/CoOOH exhibits enhanced OER performance compared to Ir<sub>T</sub>Ru<sub>V</sub>/CoOOH. In-situ spectroscopic and mechanistic studies indicate that Ru single atoms at three-fold facial center cubic hollow sites serve as adsorption sites for key reaction intermediates, while Ir single atoms at oxygen vacancy sites stabilize the *OOH intermediates via hydrogen bonding interactions. This work discloses the correlation between the synergy in heterogeneous single atoms and their anchoring sites.</p>

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Site-specific synergy in heterogeneous single atoms for efficient oxygen evolution

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月15日

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  • Peiyu Ma,
  • Jiawei Xue,
  • Ji Li,
  • Heng Cao,
  • Ruyang Wang,
  • Ming Zuo,
  • Zhirong Zhang,
  • Jun Bao

摘要

Heterogeneous single-atom systems demonstrate potential to break performance limitations of single-atom catalysts through synergy interactions. The synergy in heterogeneous single atoms strongly dependes on their anchoring sites. Herein, we reveal the site-specific synergy in heterogeneous single atoms for oxygen evolution. The RuTIrV/CoOOH is fabricated by anchoring Ru single atoms onto three-fold facial center cubic hollow sites and Ir single atoms onto oxygen vacancy sites on CoOOH. Moreover, IrTRuV/CoOOH is also prepared by switching the anchoring sites of single atoms. Electrochemical measurements demonstrate the RuTIrV/CoOOH exhibits enhanced OER performance compared to IrTRuV/CoOOH. In-situ spectroscopic and mechanistic studies indicate that Ru single atoms at three-fold facial center cubic hollow sites serve as adsorption sites for key reaction intermediates, while Ir single atoms at oxygen vacancy sites stabilize the *OOH intermediates via hydrogen bonding interactions. This work discloses the correlation between the synergy in heterogeneous single atoms and their anchoring sites.