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- W2016202429 abstract "The photoelectrochemical behavior of chemically modified Ni/TiO2 nanocomposite films in aqueous 0.1 M NaNO3 electrolyte is described. Two types of such films were prepared, either starting with a Ni/TiO2 nanocomposite photoelectrode that was subsequently cycled in 0.01 M K3Fe(CN)6 + 0.1 M NaNO3 (type I) or with a Ni electrode derivatized in situ with nickel hexacyanoferrate (NHF) and TiO2 (type II). The photoactivity of both types of films was compared with the parent Ni/TiO2 film in 0.1 M NaNO3. Type I electrodes exhibited minimal photoactivity until potentials into the NHF II → III redox regime were accessed (>ca. 0.40 V). Thereafter, the anodic photocurrents were significantly higher than the parent Ni/TiO2 counterpart. Type II electrodes exhibited “bipolar” photoactivity, the switch from cathodic photo- to anodic photobehavior again occurring at potentials close to the NHF II → III redox location. These observations on type I and type II nanocomposite films stand in marked contrast to the usual photocurrent−voltage behavior of n-type semiconductor electrodes. The unusual photoeffects are interpreted within the framework of a model including charge transfer from the photoexcited TiO2 particles to the NHF redox sites within the nanocomposite film." @default.
- W2016202429 created "2016-06-24" @default.
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- W2016202429 date "1997-12-01" @default.
- W2016202429 modified "2023-10-18" @default.
- W2016202429 title "Chemically Modified Ni/TiO<sub>2</sub> Nanocomposite Films: Charge Transfer from Photoexcited TiO<sub>2</sub> Particles to Hexacyanoferrate Redox Centers within the Film and Unusual Photoelectrochemical Behavior" @default.
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- W2016202429 doi "https://doi.org/10.1021/jp9723224" @default.
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