Electrocatalytic properties of manganese and cobalt polyporphine films toward oxygen reduction reaction

Autor: Mikhail A. Vorotyntsev, Pawel J. Kulesza, Magdalena Skunik-Nuckowska, Olivier Heintz, O. I. Istakova, Dmitry V. Konev, Beata Dembinska, Charles H. Devillers
Přispěvatelé: Mendeleev University of Chemical Technology of Russia, Institute for Problems of Chemical Physics, Russian Academy of Sciences - Chernogolovka, Faculty of Chemistry, Warsaw University of Technology, Warsaw University of Technology [Warsaw], Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon] (ICMUB), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Institut de Chimie du CNRS (INC), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Institute of Problems of Chemical Physics of RAS, Russian Academy of Sciences [Moscow] (RAS), Russian Foundation for Basic Research 16-03-00916 A European Commission through the Graphene Flagship - Core 1 project GA-696656
Rok vydání: 2018
Předmět:
conjugated porphyrin polymer
General Chemical Engineering
Inorganic chemistry
FOS: Physical sciences
chemistry.chemical_element
02 engineering and technology
Electrolyte
Manganese
positive potentials
phthalocyanines
010402 general chemistry
01 natural sciences
catalysts
Analytical Chemistry
Catalysis
porphine
[CHIM.ANAL]Chemical Sciences/Analytical chemistry
frameworks
Electrochemistry
[CHIM]Chemical Sciences
dioxygen reduction
Condensed Matter - Materials Science
metalloporphyrins
Aqueous solution
Ion exchange
Magnesium
Electroactive polymers
Materials Science (cond-mat.mtrl-sci)
Oxygen electroreduction
electropolymerization
fuel-cell cathode
021001 nanoscience & nanotechnology
Metalloporphines
0104 chemical sciences
Polymer film coated electrode
chemistry
0210 nano-technology
Platinum
Cobalt
Mg(II) porphine
Zdroj: Journal of Electroanalytical Chemistry
Journal of Electroanalytical Chemistry, Elsevier 2018, 816, pp.83-91. ⟨10.1016/j.jelechem.2018.03.042⟩
ISSN: 1572-6657
DOI: 10.1016/j.jelechem.2018.03.042
Popis: International audience; Novel member of polymetalloporphines, namely manganese polymetalloporphine of type I (pMnP-I) obtained by ion exchange from magnesium polyporphine of type I (pMgP-I) is reported for the first time and compared to its cobalt analogue (pCoP-I). Both polymer films have been obtained via two-step procedure: demetaladon of the pMgP-I electrode film via its exposure to trifluoroacetic acid solution, resulting in formation of the metal-free polyporphine of type I (pH(2)P-I) followed by electrochemically induced incorporation of Co or Mn ions from the acetonitrile solution of cobalt and manganese perchlorates. A further oxidative transformation of pCoP-I, polymer films has led to the corresponding polyporphines of type II, pCoP-II and pMnP-II, possessing such unique features as condensed polymer structure with a very high density of active sites and high electronic conductivity within a very broad potential range including the one corresponding to the neutral (uncharged) state of the polymer matrix. Both polymers of type II also exhibit interesting electrocatalytic activity toward oxygen electroreduction in aqueous neutral (pH 6.7) and alkaline (pH 13) media which was evaluated under cyclic voltammetric and steady-state conditions. The results demonstrate that the efficiency (regardless of the electrolyte) of both polymetalloporphines is comparable to bare platinum electrode. The effect of annealing of polymer-modified electrodes on their catalytic properties has also been considered.
Databáze: OpenAIRE
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