Photoelectrochemical Behavior of Sn‐Doped α‐Fe2O3 Photoanode with Different Reducer |
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Authors: | Jiajia Cai Yinglei Liu Song Li Meiqi Gao Gaowu Qin |
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Affiliation: | Key Lab for Anisotropy and Texture of Materials, School of Material Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China |
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Abstract: | Hematite has been considered as one of the most promising photoanode candidates for solar water‐splitting. However, its photoelectrochemical (PEC) efficiency is largely constrained by its sluggish oxygen evolution reaction. In this work, the photoelectrochemical performance of hematite was investigated in electrolytes containing different sacrificial agent. The photocurrent densities, onset potential, charge transfer resistance, Helmholtz capacitance at semiconductor liquid junctions (SCLJs), and their correlations were systematically studied. It was found that the onset potential is around the CH peak potential and is related to the photovoltage. The surface states pinning the Fermi levels of the hematite photoanode are related to the adsorbed water molecules regardless of the sacrificial agents in the electrolyte. |
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Keywords: | hole scavenger hematite water splitting photoelectrochemistry |
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