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- Title
ELECTROSYNTHESIS AND CHARACTERIZATION OF LEAD DIOXIDE-PERFLUOROBUTANESULFONATE COMPOSITE.
- Authors
Knysh, V.; Shmychkova, O.; Luk'yanenko, T.; Dmitrikova, L.; Velichenko, A.
- Abstract
The effect of potassium perfluorobutanesulfonate on the kinetic features of electrodeposition of lead dioxide from methanesulfonate electrolytes has been investigated. The introduction of C4F9SO3K into the lead dioxide deposition electrolyte leads to insignificant inhibition of the Pb2+ electrooxidation process, while the mechanism of the process does not change. A composite coating is formed upon deposition of coatings from electrolytes containing surfactants. The surface of a composite material consists of a mixture of clearly expressed large crystalline blocks with sharp angles and small crystals. Energy dispersive X-ray analysis revealed the satisfactory distribution of modifying elements in the entire sample bulk, and not only on the coating surface. It was shown that the electrocatalytic activity of lead dioxide--perfluorobuthanesulfonate composite differs from the undoped sample. The oxygen evolution reaction slightly decelerates on a PbO2-C4F9SO3K composite. The Tafel slopes in 1 M HClO4 calculated from these curves plotted in semilogarithmic coordinates are 136 and 145 mV dec-1 for undoped sample and lead dioxide-surfactant composite, respectively. The reaction of electrochemical oxidation of p-chlorophenol is characterized by the pseudo-first order kinetics with respect to the initial compound. The use of doped C4F9SO3K lead dioxide as an anode leads to the inhibition of the process of oxygen evolution and an almost one and a half higher rate of electrochemical conversion of 4-chlorophenol to aliphatic compounds.
- Subjects
LEAD dioxide; METHANESULFONATES; SURFACE active agents; ELECTROPLATING; ELECTROSYNTHESIS
- Publication
Issues of Chemistry & Chemical Technology / Voprosy Khimii & Khimicheskoi Tekhnologii, 2021, Vol 5, p68
- ISSN
0321-4095
- Publication type
Article
- DOI
10.32434/0321-4095-2021-138-5-68-76