Inside Cover: Rationalizing In Situ Active Repair in Hydrogen Evolution Photocatalysis via Non‐Invasive Raman Spectroscopy

In situ active repair and detection of hydrogen via ammonium persulfate (APS) and rotational Raman spectroscopy facilitates the responsible use of non-abundant transition metal complexes. The bridged heterodinuclear photocatalyst RuPtI2 used in photocatalytic hydrogen production can now be repaired via the simple addition of ammonium persulfate, as reported by Sven Rau, Boris Mizaikoff et al. in their Research Article (e202306287). Along with the innovative in situ detection of hydrogen via rotational Raman spectroscopy the applicability of active repair mechanisms for a wide range of reductive catalysts is demonstrated.