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Published on: October 23, 2018
Faradaic oxygen evolution from SrTiO3 under nano- and femto-second pulsed light excitation
D J Aschaffenburg1, X Chen, T Cuk
1Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, USA.
Abstract:
During photocatalytic water oxidation, n-SrTiO3(100) demonstrated near 100% Faradaic efficiency for O2 evolution with nano- (30 ns) and femto- (150 fs) second pulsed laser excitation of the band gap, despite surface rearrangements attributed to the high peak power (300 MW cm-2). Therefore, these results establish a methodology for tracking intermediates of the water oxidation cycle at the n-SrTiO3(100) surface from the picosecond time scales of charge transfer through to the millisecond time scales of O2 evolution.
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