Single-Atom Supported Catalysts and Beyond

Tuning electronic configurations of active components in supported metal catalysts can be achieved via strong metal-support interaction (SMSI) between loaded metal species and support, which has a profound effect on catalytic efficiency. Distinct from conventional supports, single-atom catalysts, due to their rich unsaturated coordination metal sites and versatile electronic states, are employed as supports to load active metal species, which can manipulate the SMSI and thereby regulate catalytic performance. Although single-atom supported catalysts have demonstrated remarkable advance in catalytic capabilities, this field is still in its infancy with a large room for improvement. Here, definition, classification, and state-of-the-art characterization techniques of single-atom supported catalysts are summarily demonstrated. The enhancement mechanisms influenced by site-specific strong metal-support interaction within single-atom supported catalysts including electronic interactions and synergistic catalysis are highlighted to present their potentials and advantages for catalysis community. Moreover, various single-atom supported catalysts with advanced components are summarized to discuss the relationships between components and catalytic properties. Finally, challenges and perspectives of single-atom supported catalysts for directions of future development are provided.