Repozytorium publikacji - Politechnika Gdańska

The organic-inorganic material consisted of poly(3,4-ethylenedioxythiophene) (pEDOT) and copper hexacyanoferrate (Cuhcf) was synthesized. The pEDOT film with Fe(CN)63−/4− as counter-ions potentiodynamically polarized in aqueous CuCl2 electrolyte brings about stable hybrid material (pEDOT/Cuhcf) performing single redox activity of FeII/III at a formal potential Ef = 0.61 V (vs. Ag/AgCl/0.1 M KCl) and less clearly shaped two redox coming from copper ions entrapped inside the film. XPS ex situ measurements show three different binding energies for copper (Cu 2p3/2: 932.2, 934.8 and 936.3 eV) and two for iron (Fe 2p3/2: 708.2 and 709.0 eV). Spectroelectrochemical measurements allowed to establish an order in the energy band gap (Eg) for the investigated hybrids pEDOT/Mehcf (Me = Fe, Co, Ni, Cu) as follows: Eg(pEDOT/Fehcf) = 1.40 eV < Eg(pEDOT/Cohcf) = 1.48 eV < Eg(pEDOT/Nihcf) = 1.52 eV < Eg(pEDOT/Cuhcf) = 1.6 eV. The hybrid materials were examined as electrodes for electrocatalytic reduction of H2O2. Copper centres in pEDOT/Cuhcf as well as high spin iron centres in pEDOT/Fehcf were found to be electrocatalytically active towards hydrogen peroxide reduction.

Autorzy

• prof. dr hab. Anna Lisowska-Oleksiak link otwiera się w nowej karcie ,
• dr hab. inż. Monika Wilamowska-Zawłocka link otwiera się w nowej karcie ,
• Vitalija JASULAITIENé