Comparing photoelectrochemical water oxidation, recombination kinetics and charge trapping in the three polymorphs of TiO.

In this article we present the first comparative study of the transient decay dynamics of photo-generated charges for the three polymorphs of TiO. To our knowledge, this is the first such study of the brookite phase of TiO over timescales relevant to the kinetics of water splitting. We find that the behavior of brookite, both in the dynamics of relaxation of photo-generated charges and in energetic distribution, is similar to the anatase phase of TiO.