Single-atom catalysts for electrocatalytic oxygen evolution reaction

In recent years, a series of noble metals and transition metal-based single-atom catalysts (SACs) have been explored for electrochemical oxygen evolution reaction (OER). The unique structural and electronic features of the SACs facilitate the OER with maximum atomic utilization. As a result, a high turnover frequency is achieved with SACs. In this chapter, we have summarized the fundamentals of the SACs and their design strategies for electrochemical OER. The detailed characterization of the SACs and its utilization in OER has been discussed with suitable examples. The principles and reaction mechanism of electrochemical OER with SACs have been discussed looking at the structure of the active catalyst and reaction intermediates.