Trends and Prospects of Bulk and Single‐Atom Catalysts for the Oxygen Evolution Reaction

Electrolytic hydrogen is expected to play a key role in the production of green fuels and chemicals, while contributing balancing consumption supply future electricity grid relying largely on intermittent renewable sources for energy production. However, oxygen evolution reaction (OER) major bottleneck boosting conversion efficiency due sluggish kinetics four-electron transfer process. Intensive research efforts are thus directed toward development advanced OER electrocatalysts. This review aims at bringing together recent advances bulk single-atom electrocatalysts (SACs) OER. Starting from established understanding mechanism, it offers an overview state-of-the-art materials OER, highlighting current directions shortcomings The final part addresses novel SACs, covering their performance as well synthetic routes characterization techniques that shine light geometric electronic configuration SACs. experimental findings complimented with theoretical insights density functional theory (DFT). article concludes summary along opportunities further improve activity SACs