In this paper studies of overvoltage and capacitance measurements at silver cathodes in aqueous perchloric acid at room temperature are described. Capacitances were deduced from open-circuit potential decay measurements. The increase of overvoltage and the growth of the measured capacitances in the course of electrolysis are attributed to a growing pseudocapacitance component. This is anal...

Electrochemical synthesis followed by heat-treatment is a facile and easy method for preparation of nanostructured metal oxides. Herein we report nanostructured Mn5O8 prepared through pulse cathodic deposition followed by heat-treatment for the first time. For the preparation of Mn5O8 nanorods, pulse cathodic electrodeposition was first done from 0.005M Mn(NO3)2 at the current density of 5 mA c...

2,3~7o,e 2,3r/o,a bulk concentration diffusion coefficient Faraday constant exp (r?/~7o,c) -exp (-r?/r~o,~) exp (r//~7o,e) exp ( r~/~o,a) exchange current density current density limiting current density limiting current density under spherical diffusion control number of electrons number of nuclei (cm 2) radius of growing nucleus radius of critical nucleus radius of growing nucleus at which de...

in this work, a tracer study on pore initiation in anodic alumina in oxalic acid was performed. effects of some experimental parameters such as applied electrical potential, electrolyte composition and heat pretreatment were evaluated. electrochemical and morphological experiments were performed using potentiostatic anodizing and scanning electron microscopy (sem) techniques, respectively. effe...

1. MODELING 1.1 Physical properties Table 1 lists the kinetic parameters assumed for the simplified, one-dimensional model of a photoelectrochemical cell in which the hydrogen-evolution reaction (HER) is catalyzed by platinum at the cathode and the oxygen-evolution reaction (OER) is catalyzed by iridium oxide at the anode. Table 1: List of kinetic parameters for OER and HER Parameter Descriptio...