Fe2O3 and Fe2O3/Ni(OH)2 photoanodes for highly efficient photoelectrochemical water splitting and urea oxidation

International audienceIn this manuscript, we propose to produce and characterize a photoelectrodes based on hematite Fe 2 O 3 /Ni(OH) 2 , without hazardous chemical substances (non-CMR substances) and no ozone emanation in handmade photocell. Fe 2 O 3 and Fe 2 O 3 / Ni(OH) 2 photoanodes were synthesis by hydrothermal method, and were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energydispersive X-ray analysis (EDX), and ultraviolet-visible (UV-Vis) analysis. The photoelectrochemical (PEC) performances of the Fe 2 O 3 and Fe 2 O 3 /Ni(OH) 2 films was examined by linear sweep voltammetry techniques, cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy analysis, which confirm that the highest photocurrent about 0.344 mA/cm 2 at 0.5 V vs Hg/HgO was obtained for the Fe 2 O 3 /Ni(OH) 2 photoanode in 0.1 M urea than 0.09 mA/cm 2 without urea. Result provided in this work can provide an imperative guideline for the design of efficient photocatalysis application using Fe 2 O 3 /Ni(OH) 2 for photoelectrochemical urea conversation