Photocatalytic Production of Hydrogen by Disproportionation of One‐Electron‐Reduced Rhodium and Iridium–Ruthenium Complexes in Water

One at a time: A rhodium aqua complex and a heterodinuclear iridium–ruthenium complex (see picture) act as effective catalysts for the photocatalytic two-electron reduction of protons. Hydrogen is produced with the aid of a photosensitizer and an electron donor by disproportionation of the corresponding one-electron-reduced metal complexes. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.