​Utilization of solar energy also requires efficient and low cost energy storage, for dark hours. Optimizing the performance of hematite photoelectrodes for the production of solar fuels by water oxidation is done via engineering of structural and spatiotemporal heterogeneities, and profound studies and understanding of the photoelectrochemical reaction mechanism. The aim is to suggest methods to overcome the rate determining step and accelerate the overall reaction rate. Integrating photovoltaic devices as the power source of photoelectrochemical devices will lead to better utilization of the solar spectrum and combining energy conversion and storage.

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Selected relevant publications
• ​V. Ramakrishnan et al., Competitive photo-oxidation of water and hole scavengers on hematite photoanodes: Photoelectrochemical and operando Raman spectroelectrochemistry study, ACS catalysis, 13 (2023), 540–549 https://doi.org/10.1021/acscatal.2c02849
• B. Scherrer et al., Defect segregation and its effect on the photoelectrochemical properties of Ti-doped hematite photoanodes for solar water splitting, Chemistry of Materials, 32 (2020), 1031-1040 https://doi.org/10.1021/acs.chemmater.9b03704
• Y. Y. Avital et al., Two-site H2O2 photo-oxidation on haematite photoanodes, Nature Communications 9 (2018), 4060 https://doi.org/10.1038/s41467-018-06141-0