Wydział Chemii

Sofiia Prykhodska

Aleksandra Zaręba

Maria Grzeszczuk

2020

Synthetic Metals

270

116597/1-116597/12

10.1016/j.synthmet.2020.116597

Naukowa

Angielski

Artykuł

Silver(I) hexafluorophosphate was dispersed in electrosynthezed polypyrrole hexafluorophosphate by precipitation, using an aqueous Ag(I) nitrate solution. The electrochemistry of the resulting composite was studied in aqueous hexafluorophosphate. The examined potential window encompassed the reversible redox process of the polymer and the redox transformations of the inorganic components, i.e. silver species, taking place within this window. The electrocrystallization of silver nanoparticles was controlled by dc potential. The Ag nanoparticles entrapped in polypyrrole, generated at reduction potentials of the composite, were 10¹ nm in diameter. The slightly larger AgNP of a mixed chemical nature was formed by a spontaneous discharge of the oxidized polypyrrole - salt composite towards the open circuit potential. Electrochemical processing and characterization of the composite were done using the dc and ac methods. Several other methods of chemical and structural identification were employed. The influence of oxygen for the processing of the composite towards metallic nanoparticles was shown. Electrochemical chemically irreversible oxidation of Ag₂O to AgO in the polypyrrole matrix was found.

synthetic metals, polypyrrole composities, Silver nanoparticles, redox chemistry, electrocrystallization

http://dx.doi.org/10.1016/j.synthmet.2020.116597

http://www.elsevier.com