Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
Publication date: 28th August 2024
Halide perovskites have great water and pH stability and a very high photovoltaic power conversion efficiency, making them an excellent photocatalyst for water oxidation. The primary method for boosting solar-to-hydrogen conversion efficiency is to control electron-hole recombination, charge transfer, and oxygen evolution kinetics. Photocatalytic activity has recently been found to be enhanced by the application of electron spin. Here, we demonstrate the increase in photocurrent density in water oxidation by 16 % by applying an external magnetic field of 2000 G parallel to the surface of Cs2RuX6 (X: Cl, Br) photoanodes. A systematic investigation has been carried out to explain the augmentation of the activity. Electrochemical Impedance Spectroscopy (EIS) analysis implies that inducing a magnetic field influences surface catalytic activity and accelerates the oxygen evolution reactions. Observations in the conduction on the pellet subjected to magnetic fields of different strengths reveal a reduction in bulk resistance, which relates to improved charge transfer. Our investigations show that magnetic field assistance can enhance the PEC water-splitting activity of halide perovskites.
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