Introduction
The Oxygen Evolution Reaction (OER) is the half-reaction during water electrolysis where water is split to release oxygen at the anode.
🔗 Read more
OER in Electrolysers – Nature Reviews Chemistry
🧠 What It Means
Occurs in electrolysis: 2H₂O → O₂ + 4H⁺ + 4e⁻
One of the most energy-intensive steps in water splitting.
Requires effective and stable catalysts (often iridium or nickel).
❗ Key Challenges
OER has slow kinetics and high overpotentials.
Electrode corrosion and catalyst degradation.
Cost and supply issues for rare catalyst materials.
🦁 Muzaffar’s Comment
“The OER is the bottleneck in green hydrogen — it’s the tough part of water splitting.”
🦉 Sameer’s Comment
“Want cheap green hydrogen? Then cracking the OER is mission critical.”
