Photocatalytic Partial Water Dissociation by Protonated Carbon Nitride for Hydrogenation Reactions

reacts with dioxane, yielding value-added dioxane-2-ol and prolonging the lifetime of hydrogen atoms for hydrogenation. A high quantum efficiency of ∼6% can be realized under visible light irradiation for the selective hydrogenation of aromatic bromides and aldehydes with high conversion. This approach is scalable in a flow system, revealing financial and environmental potential for hydrogenation and deuteration at a practical level.