Equilibria between Peroxo and Hydroperoxo Species in the Titanosilicates: An In Situ High‐Resolution XANES Investigation

Abstract

Water is the key factor: For titanium-silicalite-1 in aqueous H2O2, the driving force that governs the equilibrium between the uncolored end-on η1-titanium–hydroperoxo complex and the yellow-colored side-on η2-Ti-peroxo complex (see picture) is the amount of water present in the system, as proven by in situ X-ray absorption near edge structure spectroscopy performed at 77 K.