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The n-GaAs/Fe3+ system as an experimental example

Article Abstract:

Research was conducted to examine the electrochemical impedance spectrum of the n-GaAs/Fe3+ system in 1 M H2SO4 aqueous solution based on the theoretical impedance expression for charge transfer through surface states. Results based on current density vs potential and Mott-Schottky measurements both at n- and p-GaAs electrodes reveal that charge transfer through surface states is the most plausible reaction mechanism for the Fe3+ to Fe2+ reduction. Findings also reveal that the Fe3+ reduction rate at n-GaAs is strongly influenced by the electrode pretreatment used.

Oxidation-reduction reaction, Oxidation-reduction reactions, Semiconductors, Charge transfer, Electrodes, Impedance (Electricity), Gallium arsenide semiconductor devices, Gallium arsenide semiconductors

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Bulk heterojunction photoelectrochemical cells consisting of oxotitanyl phthalocyanine nanoporous films and [[I.sub.3].sup -]/[I.sup. -] redox couple

Article Abstract:

The construction of photoelectrochemical cells consisting of oxotitanyl phthalocyanine (TiOPc) nanoporous films and [[I.sub.3].sup -]/[I.sup. -] redox couple on an indium-tin oxide coated glass plate (ITO) by the micellar disruption technique is described and their deposition behavior studied. Results reveal that the deposition is governed by the diffusion of the pigment particles from the dispersion bulk to the ITO surface and that the packing density of the films is kept constant during their growth.

Tin compounds, Photochemistry

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Photoanodic dissolution of n-Inp: an electrochemical impedance study

Article Abstract:

The electrochemical impedance of the n-InP photonode in 1.2 M HCl, investigating the potential range between almost complete recombination and almost complete photoanodic dissolution are studied. The result indicates that the electrochemical impedance spectroscopy provides information on the mechanism and the kinetics of photodissolution reactions.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Phosphorus & Compounds, Elemental Phosphorus, Electrochemistry, Phosphorus

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