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Author Nagy, G. ♦ Schiller, R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword DIRECT ENERGY CONVERSION ♦ INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ MATERIALS SCIENCE ♦ HYDROGEN ♦ DIFFUSION ♦ SODIUM TUNGSTEN BRONZE ♦ PHOTOCHEMISTRY ♦ AQUEOUS SOLUTIONS ♦ ATOM TRANSPORT ♦ CATHODES ♦ CHARGE CARRIERS ♦ CHEMICAL REACTION KINETICS ♦ ELECTROCHEMISTRY ♦ IRON ♦ NITRATES ♦ OXYGEN ♦ PHOTOCURRENTS ♦ ALKALI METAL COMPOUNDS ♦ CHALCOGENIDES ♦ CHEMISTRY ♦ CURRENTS ♦ DISPERSIONS ♦ ELECTRIC CURRENTS ♦ ELECTRODES ♦ ELEMENTS ♦ KINETICS ♦ METALS ♦ MIXTURES ♦ NEUTRAL-PARTICLE TRANSPORT ♦ NITROGEN COMPOUNDS ♦ NONMETALS ♦ OXIDES ♦ OXYGEN COMPOUNDS ♦ RADIATION TRANSPORT ♦ REACTION KINETICS ♦ REFRACTORY METAL COMPOUNDS ♦ SODIUM COMPOUNDS ♦ SODIUM OXIDES ♦ SOLUTIONS ♦ TRANSITION ELEMENT COMPOUNDS ♦ TRANSITION ELEMENTS ♦ TUNGSTEN COMPOUNDS ♦ TUNGSTEN OXIDES ♦ Fuel Cells- Materials, Components, & Auxiliaries ♦ Electrochemistry ♦ Photochemistry ♦ Materials- Properties
Abstract The cathodic photoeffect on hydrogenated sodium tungsten bronzes was studied in acid solutions under potentiostatic conditions. Solute effect proved the accompanying chemical reactions in the liquid phase to be brought about by hydrogen atoms. Kinetic analysis of the photocurrent showed that photoproduction and second-order recombination of the charge carriers in the solid are followed by reversible reduction of H/sup +/ at the interface. Finally H-atoms react with solutes like O/sub 2/, NO/sub 3//sup -/, Fe/sup 3+/, Fe(CN)/sub 6//sup 3-/, or tetranitromethane. The kinetics of charge carrier formation and of chemical reactions seem to be only weakly coupled, and the entire process can be described in terms of homogeneous kinetics showing diffusion and migration to be kinetically unimportant.
Educational Use Research
Learning Resource Type Article
Publisher Date 1988-12-01
Publisher Place United States
Journal J. Electrochem. Soc.
Volume Number 135
Issue Number 12
Organization Central Research Institute for Physics, Budapest (HU)


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