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bulk and then further move through the
external circuit to the counter Pt electrode to
reduce protons. This suggests that water is
decomposed by visible light into oxygen and
hydrogen, without the application of any
external voltage, according to
Eq. 6.31
. This is
an innovative breakthrough and is referred to
as the Honda-Fujishima effect [117].
(6.31)
Photoelectrochemical cells have the advantage
of producing oxygen and hydrogen in addition
to electrical energy. However, there have been
few examples of applications of such
photoelectrolysis to organic reactions to date.
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