<p>Single−atom catalysts (SACs) have attracted significant attention in the field of electrocatalytic energy conversion owing to their unique catalytic properties and exceptionally high metal−atom utilization efficiency. This review systematically summarizes recent synthesis strategies for SACs, and critically analyzes the advantages and limitations of each approach. With respect to catalyst characterization, advanced techniques, such as aberration−corrected scanning transmission electron microscopy (AC−STEM) and X − ray absorption fine structure (XAFS), are highlighted for their crucial roles in elucidating atomic dispersion, coordination environments and electronic structures. Furthermore, the performance and applications of SACs in key electrocatalytic reactions are comprehensively reviewed, including the oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and other representative reactions. Finally, current challenges and future research directions are discussed, offering insights into the reasonable design of high−performance SACs and their progress towards practical applications.</p> Graphical abstract <p> This review comprehensively analyzes diverse synthesis strategies and characterization techniques for SACs and outlines their applications in key electrocatalytic reactions, with the aim of providing valuable insights for rationally designing high−performance SACs and accelerating their transition to practical use.</p>

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Recent advances in synthesis strategies and electrocatalytic applications of single−atom catalysts

  • Liang Chen,
  • Qing Zeng,
  • Yun Peng,
  • Chenxi X. Xu,
  • Yucan Zhu,
  • Gangyong Li,
  • Jiale Sun,
  • Wei Wang,
  • Zhaohui Hou

摘要

Single−atom catalysts (SACs) have attracted significant attention in the field of electrocatalytic energy conversion owing to their unique catalytic properties and exceptionally high metal−atom utilization efficiency. This review systematically summarizes recent synthesis strategies for SACs, and critically analyzes the advantages and limitations of each approach. With respect to catalyst characterization, advanced techniques, such as aberration−corrected scanning transmission electron microscopy (AC−STEM) and X − ray absorption fine structure (XAFS), are highlighted for their crucial roles in elucidating atomic dispersion, coordination environments and electronic structures. Furthermore, the performance and applications of SACs in key electrocatalytic reactions are comprehensively reviewed, including the oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and other representative reactions. Finally, current challenges and future research directions are discussed, offering insights into the reasonable design of high−performance SACs and their progress towards practical applications.

Graphical abstract

This review comprehensively analyzes diverse synthesis strategies and characterization techniques for SACs and outlines their applications in key electrocatalytic reactions, with the aim of providing valuable insights for rationally designing high−performance SACs and accelerating their transition to practical use.