Voltammetric anodic stripping of silver from platinum electrodes consisting of an array of nm-sized voids

摘要: Abstract Silver voltammetric anodic stripping from stabilized rough platinum electrodes in 1 M H2SO4+co Ag2SO4 (5×10−4 M≤co≤10−3 M) and H2SO4 aqueous solutions, at 298 K, was investigated. The topography of these determined by scanning tunneling microscopy (STM). roughness factor, R, varied 10 to 71. analysis STM images showed that the structure consists an array nm-sized protrusions voids as a columnar structured surface. For each value average size volume were determined. features silver depend on R electrodeposited charge, QAg. QAg(vs), saturation QAg for voids, estimated. underpotential deposited occurs potential range where oxygen electroadsorption takes place. By using data derived imaging equations have been reactions, which reactant is confined behaviour system can be reproduced reasonably.