Opportunities and Challenges in Precise Synthesis of Transition Metal Single-Atom Supported by 2D Materials as Catalysts toward Oxygen Reduction Reaction

Transition metal single-atom catalysts (SACs) are currently a hot area of research in the field of electrocatalytic oxygen reduction reaction (ORR). In this review, the recent advances in transition metal single-atom supported by 2D materials as catalysts for ORR with high performance are reported. Due to their large surface area, uniformly exposed lattice plane, and adjustable electronic state, 2D materials are ideal supporting materials for exploring ORR active sites and surface reactions. The rational design principles and synthetic strategies of transition metal SACs supported by 2D materials are systematically introduced while the identification of active sites, their possible catalytic mechanisms as well as the perspectives on the future of transition metal SACs supported by 2D materials for ORR applications are discussed. Finally, according to the current development trend of ORR catalysts, the future opportunities and challenges of transition metal SACs supported by 2D materials are summarized.

Automated summary

This review highlights the recent advances in transition metal single-atom catalysts supported by 2D materials for electrocatalytic oxygen reduction reaction (ORR). It discusses the advantages of 2D materials as supporting materials, the identification of active sites, possible catalytic mechanisms, and future perspectives in the field. Additionally, it summarizes the future opportunities and challenges of transition metal single-atom catalysts supported by 2D materials based on the current development trend of ORR catalysts.