Revealing Effect of Surface Hydroxyl Variation on Charge Spatiotemporal Dynamics in Photocatalysis

imaging indicates that the surface hydroxyl-related charge-transfer sites align with reaction sites. This study reveals the critical role of surface defect states related to surface hydroxyl variation on charge separation and transport, which helps to understand the pivotal role of surface states in the entire photocatalytic process, also providing a valuable reference for most oxide semiconductor photocatalysts with intrinsic surface hydroxyl groups.