Nafion effect on the lead dioxide electrodeposition kinetics

Investigation on electro-catalytic oxidation properties of carbon nanotube–Ce-modified PbO2 electrode and its application for degradation of m-nitrophenol

“…However, its application is limited in the actual treatment of industrial wastewater due to the high operating cost caused by its low current efficiency (Zhou et al, 2005). So, researchers have attempted to modify the PbO 2 electrode by different methods, and it has been proven that the reasonable modification methods can improve the electro-catalytic oxidation activity of the PbO 2 anode and enable it to be more efficient during electro-catalytic oxidation process (Yang et al, 2012;Tong et al, 2008;Velichenko et al, 2007;Andrade et al 2007;Wang et al, 2010).…”

Anodic deposition of lead dioxide at Nafion® covered gold electrode

“…In his studies of the effect of dissolved Nafion® [32] and the effect of other fluorine containing compounds [33] on PbO 2 electrodeposition, Velichenko identified at least two types of interactions which might exist between Nafion® and lead compounds and affect electrodeposition kinetics and the properties of the resulting layers. Apart from the bulk effects caused by the interaction of positive lead ions with Nafion® polyanionin bulk electrolyte, he found that the adsorption of polyelectrolyte on PbO 2 occurs not only due to the electrostatic attraction of polyanion to the positively charged surface of PbO 2 but also the existence of some specific interactions.…”

“…Up to our knowledge, no results describing PbO 2 deposition at gold electrode covered by Nafion® layer exist in the literature. There were, however, a couple of papers dealing with PbO 2 electrodeposition from the solutions of Pb(II) ion in the presence of dissolved Nafion® [32,33]. The results of these investigations were very interesting and showed that the presence of Nafion® did not hinder the electrodeposition process but rather facilitated it.…”

Electrodeposition of PbO2–TiO2 Nanocomposite Materials from Suspension Electrolytes

“…Since the exponent at the wavelength for the investigated sols was 4.0 the Rayleigh equation was used in the calculations. Since the crystal lattice of the anatase modification is usually formed during the production of a titanium hydroxide sol the refractive index (2.550) and density (3.95 g/cm 3 ) of anatase were used in the calculations. The refractive index of the aqueous medium was taken as 1.332.…”

“…Here, without changing the main characteristics of PbO 2 , it is possible to increase its electrochemical activity considerably by modification with various ions [2], surfactants, polyelectrolytes [3], and particles of oxides from the suspension electrolytes [4][5][6][7][8][9][10][11]. The last case is of greatest interest not only because the electrocatalytic characteristics can be substantially improved through the formation of a composite coating but also because the internal stresses of the deposits are reduced, making it possible to create a dimensional stable anode with a satisfactory service life.…”