TITLE:
Dye Regeneration Kinetics of Sensitized Nickel Oxide Films under Illumination Investigated by Scanning Electrochemical Microscopy
AUTHORS:
Anshebo Getachew Alemu, Teketel Alemu
KEYWORDS:
Scanning Electrochemical Microscopy, Nickel Oxide, Regeneration Kinetics
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.11 No.4,
April
12,
2021
ABSTRACT: Scanning electrochemical microscopy (SECM) feedback mode has been used to investigate regeneration kinetics on P1 (4-(bis-{4-[5-(2,2-dicyanovinyl) thiophene-2-yl] pH-enyl} amino) benzoic acid) dye sensitized nickel oxide (NiO) electrodes in contact with reduced iodide liquid electrolyte in different electrolyte solvents. We were used acetonitrile, ethanol, methanol and propylene carbonate solvents for comparison under illumination of different wavelengths. We found significant variation of regeneration kinetics parameters such as regeneration rate constant (keff), the reduction rate constant (kred) and absorption cross-section (Φhv) in different illumination intensity and different solvents.