Unraveling the Surface Reactivity of Pristine and Ti Doped Hematite with Water
Résumé
Water adsorption and dissociation on undoped and Ti doped hematite thin films were investigated using near ambient pressure photoemission and DFT calculations. A fine understanding of doping effects is of prime importance in the framework of photoanodes efficiency in aqueous conditions. By comparison to pure Fe 2 O 3 surface, the Ti(2%)-Fe 2 O 3 surface shows a lower hydroxylation level. We demonstrate that titanium induces wide structural modifications of the surface, preventing from reaching the full hydroxylation.
Domaines
Chimie
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