Fe-based Electrocatalysts for Oxygen Evolution Reaction: Progress and Perspectives

Electrocatalytic oxygen evolution reaction (OER) is a core reaction responsible for converting renewable electricity into storable fuels, yet it is kinetically challenging due to the complex proton-coupled multi-electron transfer process. Transition metal-based electrocatalysts provide the possibility for the realization of low-cost, high-activity and stable OER in alkaline solution, thus have attracted significant research interest in recent years. A fundamental understanding of composition-structure-activity relationships for these electrocatalysts is essential to guide the design of practical electrocatalysts for industrial applications. With more advanced ex- and in-situ techniques to determine the active sites, there has been increasing evidence revealing the critical role of Fe in the high performance of Fe-containing transition metal-based electrocatalysts. Here, we present a critical review of recent progress in Fe-containing electrocatalysts for OER, highlighting the significant role of Fe in enh...