The limiting role of iodide oxidation in cis-Os(dcb)2(CN)2/TiO2 photoelectrochemical cells

Article Abstract:

Regenerative photoelectrochemical cells cis-Ru(dcb)2(CN)2 that are anchored to nanocrystalline TiO2 are able to convert photons to electrons quantitatively. This characteristic is not possessed by the analogous Os(II) sensitizer. Time-resolved absorbance and reflectance measurements show that the lower photocurrent efficiency is due to the sluggish iodide oxidation rate of the cis-OsIII(dcb)2(CN)2+TiO2. Therefore, iodide oxidation is the rate-limiting step in the sensitization of nanocrystalline TiO2.

Oxidation-reduction reactions, Chemical reaction, Rate of, Chemical kinetics, Iodides, Photoelectric cells

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Ion-selective membranes involved in pattern-forming processes

Article Abstract:

The ability of simple inorganic reactions such as NaOH+CuCl2, NaOH+AgNO3 and CuCl2+K3[Fe-(CN)6] to form various complex precipitation patterns is presented. The results suggested that one of these surfaces is permeable, while the other one is an ion-selective membrane that restrains the diffusion of the first reagent's reacting ion, preventing the reactions from proceeding ahead of the membrane.

All Other Miscellaneous General Purpose Machinery Manufacturing, Ion Exchange Membranes, General industrial machinery, not elsewhere classified, Analysis, Spectra, Chemical synthesis, Precipitation (Chemistry), Ion-permeable membranes

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Simultaneous oscillations of surface stress and potential in the course of galvanostatic oxidation of formic acid

Article Abstract:

Experiment results on the periodic changes of the deformation of a platinum electrode in the case of galvanostatic oscillation of formic acid in perchloric acid are presented. The bending beam method offers a powerful way to gain a better understanding of electrochemical oscillation phenomena.

Oxidation reduction reactions, Formic acid

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