OER stands for oxygen evolution reaction, which is a half-reaction that occurs during the electrolysis of water to produce oxygen

 OER stands for oxygen evolution reaction, which is a half-reaction that occurs during the electrolysis of water to produce oxygen: 

Explanation

During electrolysis, water is split into hydrogen and oxygen using electricity. The oxygen evolution reaction (OER) is the reaction that occurs at the anode to produce oxygen. 

Importance

OER is a limiting reaction in the process of generating molecular oxygen. It plays a crucial role in processes like water oxidation in photosynthesis and electrocatalytic oxygen evolution. 

Electrocatalysts

OER catalysts are based on Ru- or Ir-oxides. Ir oxide-based catalysts are highly active and stable, but iridium is a scarce and expensive metal. Co-based catalysts are also attractive for OER because they are low cost and have high OER activity. 

Strategies for improving OER catalysts

Strategies for improving OER catalysts include:

Optimizing factors that influence stability 

Forming a protection layer 

Cathodic treatment 

Self-healing 

Dynamic stabilization 

Constructing superaerophobic nanoarray