Open AccessControlled Periodic Illumination Enhances Hydrogen Production by over 50% on Pt/TiO2
Author(s) -
Fabrizio Sordello,
Francesco Pellegrino,
Marco Prozzi,
Claudio Minero,
Valter Maurino
Publication year - 2021
Publication title -
acs catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.898
H-Index - 198
ISSN - 2155-5435
DOI - 10.1021/acscatal.1c01734
Subject(s) - catalysis , noble metal , hydrogen production , metal , hydrogen , desorption , nanoparticle , materials science , photochemistry , absorption (acoustics) , inorganic chemistry , chemistry , chemical engineering , nanotechnology , chemical physics , adsorption , metallurgy , organic chemistry , engineering , composite material
Efficient 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/TiO 2 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.