Doped Hematite Nanorods to Enhance Photoelectrochemical Ability for Oxygen Evolution Reaction

Dixit, Harsha (2018) Doped Hematite Nanorods to Enhance Photoelectrochemical Ability for Oxygen Evolution Reaction. Masters thesis, Indian Institute of Science Education and Research Kolkata.

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Abstract

Photoelectrochemical water splitting is a promising method to capture,store and convert solar energy into useful forms of energy. Hematite (α-Fe₂O₃), due to its favorable band position and appropriate band gap is a promising candidate for such energy conversion. However, the poor conductivity and high charge recombination rate, limit the practical application of hematite in solar water splitting. Herein, we describe the fabrication of α-Fe₂O₃ nanorodsphotoanode with metallic and non metallic codoping using Ti-P and Ti-N. A saturation photocurrent of 1.80mA/cm² under air mass 1.5G illumination. We have futher analysed the change in photocurrent trend with front and back illumination and studied their kinetics using hole scavenging experiments and found that metallic and non metallic codoping exhibit interesting properties that are not observed neither in metallic, nor in non-metallic doping.

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