Hydroxyl‐Promoted C─C Coupling for Selective Methane Conversion into Ethane on Cerium Oxide Photocatalyst

with approximately 97% selectivity over an extended operation period (>200 h), surpassing previous noble-metal-free photocatalytic systems. This work provides critical insights into the role of hydroxyl-modified local environment in methane valorization, paving the way for the development of sustainable and efficient catalytic systems.