Solar water splitting materials that generate the most current need Pt-group elements (PGEs). The replacement of PGEs is in principle possible with photoanodes consisting of hematite (-Fe2O3), a photochemically stable earth-abundant mineral phase that is also non-toxic, inexpensive, and readily obtainable in chemically pure form. However, the maximum possible current density of ~12 mA cm-2 at 0.6 VRHE required to make the use of hematite solar photoanodes viable is yet to be achieved. The project's guiding hypothesis is that water reorientation near the active site is a significant source of overpotential (0.5-0.6 V from experiment) for water oxidation.
|Effective start/end date||9/1/22 → 8/31/25|
- Department of Energy (DE-SC0023342)
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