Abstract
Mesoporous TiO2 nanocrystalline film was coated on fluorine-doped tin oxide electrode (mp-TiO2/FTO) by the doctor blade method, and Prussian blue film was electrodeposited on FTO (PB/FTO). A two-compartment H2O2-PFC with the structure of mp-TiO2/FTO (photoanode)|0.1 M KClO4 (pH 3)|Nafion (separator)|0.1 M KClO4 with 0.1 M H2O2 (pH 3)|PB/FTO (cathode) was constructed. Under UV-light irradiation, the two-compartment PFC provides short-circuit current (Jsc) = 1.14 mA cm−2 and open-circuit potential (Voc) = 952 mV much greater than the values of Jsc = 0.197 mA cm−2 and Voc = 607 mV for the one-compartment cell. Importantly, the electromotive force for the two-compartment H2O2-PFC exceeds the thermodynamic value of 534 mV calculated from the electrode potentials for the half-reactions.
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