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Microwave Effects on Co-Pi Cocatalysts Deposited on α-Fe2O3 for Application to Photocatalytic Oxygen Evolution
Masato M Maitani1, Takuya Yamada1, Hisanori Mashiko1
1Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 2-12-1 Ookayama, Meguro, Tokyo 152-8550, Japan.
Abstract:
We analyze the effects of microwave applied in the process of photoelectrochemical deposition of cobalt-based cocatalysts, Co-Pi, onto well-orientated flat α-Fe2O3 thin films, which were fabricated by pulsed laser deposition. As compared with conventional heating, microwave significantly affects the morphology, chemical composition, and photocatalytic activity of Co-Pi/α-Fe2O3 composite. A significant enhancement in photocurrent related to photocatalytic water oxidation is achieved by the Co-Pi catalyst prepared under microwave irradiation. This, along with its interfacial electron-transfer properties, is studied by means of electrochemical impedance spectroscopy.
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