Inside Back Cover: Selective Reduction of Aqueous Protons to Hydrogen with a Synthetic Cobaloxime Catalyst in the Presence of Atmospheric Oxygen (Angew. Chem. Int. Ed. 37/2012)

The economical splitting of water into the fuel H 2 and the by‐product O 2 requires inexpensive catalysts that operate in aqueous solution and in the presence of O 2 . In their Communication on page 9381 ff., E. Reisner et al. show that a synthetic cobalt catalyst evolves H 2 electro‐ and photocatalytically under the highly demanding conditions of pH‐neutral water and under atmospheric O 2 . The picture shows the preference of the cobalt catalyst for aqueous protons, and the evolution of H 2 bubbles upon irradiation with visible light in air.