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Download fileControlled Periodic Illumination Enhances Hydrogen Production by over 50% on Pt/TiO2
journal contribution
posted on 2021-05-18, 18:04 authored by F. Sordello, F. Pellegrino, M. Prozzi, C. Minero, V. MaurinoEfficient solar water
photosplitting is plagued by large overpotentials
of the HER and OER. Even with a noble metal catalyst, the hydrogen
evolution reaction can be limited by the strong M–H bonding
over some metals, such as Pt, Pd, and Rh, inhibiting hydrogen desorption.
H absorption is regulated by the potential at the metal nanoparticles.
Through controlled periodic illumination of a Pt/TiO2 suspension,
we hypothesized a fast variation of the photopotential that induced
catalytic surface resonance on the metal, resulting in more than a
50% increase of the efficiency at frequencies higher than 80 Hz.