Catalytic Activity of Thallium on Electrochemical Degradation of Metronidazole from Aqueous Solutions

Anticorrosive coating based on poly(vinyl acetate) formed by electropolymerization on the copper surface

“…The polarization resistance ( R p ) was determined from the linear diagram shown in Figure (b) plotted in the potential range very close to the corrosion potential (±30 mV). The slopes of straight lines represent 1/ R p . According to equations inserted in Figure (b), it is noted that the copper coated with PVAC has the highest polarization resistance, which denotes polymer inhibition capacity.…”

“…The organic films with inhibitory properties interpose at the material/electrolyte interface reducing the oxidation processes, thereby restricting the corrosion upon metals‐environment contact. In addition, these can have an electrocatalytic effect on the decomposition reactions of some compounds which pollute the industrial environments and wastewaters, being used to prepare specific electrodes for decontamination of the respective media …”

Copper corrosion inhibitors based on polyvinyl alcohol and silver nanoparticles

“…Some literature studies have reported that a porous layer of adsorbed CuCl is formed on the copper surface, demonstrating the diffusion of Clthrough the layer and also the formation of Cu 2+ during electro-dissolution [20]. At higher potential values two peaks can be observed corresponding to other oxidation reactions [27], as follows: Cu to Cu 2+ (0.34 V), Cu to Cu + (0.52 V) and CuCl to [CuCl] + (0.54 V); ii) in the presence of PVA, the current density values is slightly changing until 0.3 V with the potential increasing assigning the curve shape to a relatively passive state copper. After 0.3 V, the copper becomes relatively active probably due to the PVA desorption from the surface.…”

“…The reference electrode of Ag/AgCl sat was coupled through a Luggin capillary. The methodology and equipment were also presented in our previous studies [23][24][25][26][27][28].…”

“…The potentiodynamic polarization applied on copper in 0.1 mol L -1 HCl solution without and with inhibitors ( Figure 2a) designed three different potentiodynamic polarization curves which provide the following information: i) In the absence of PVA, the copper oxidation is starting around 0.0 V, when the CuCl is formed at 0.13 V; it is followed by successive reactions resulting in different chloride species such as [CuCl 1+z ] z- [27] and Cu + oxidation to Cu 2+ takes place at 0.16 V [27]. Some literature studies have reported that a porous layer of adsorbed CuCl is formed on the copper surface, demonstrating the diffusion of Clthrough the layer and also the formation of Cu 2+ during electro-dissolution [20].…”