Tailoring the performance of a photocatalyst by design is challenge in the field of renewable synthetic fuels. In this work, the authors demonstrate how polymorphic heterostructures comprised of two indium oxide based photocatalysts, with distinct structures yet continuously adjustable fractions of the same composition, enable optimization of the activity and selectivity of CO2 hydrogenation to CO and CH3OH. Interfaces formed between cubic and rhombohedral polymorphs with distinct electronic band structures, vacancies, and defects enable the charge generation, separation, and lifetimes of photogenerated electron-hole pairs to be finely tuned.
See full article at Energy and Environmental Science.
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