1. Rationalizing the influence of the Mn(IV)/Mn(III) red-Ox transition on the electrocatalytic activity of manganese oxides in the oxygen reduction reaction
- Author
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Gwénaëlle Kéranguéven, Evgeny V. Antipov, Tiphaine Poux, Eduard E. Levin, Alexander Ye. Baranchikov, Artem M. Abakumov, Elena R. Savinova, Galina A. Tsirlina, Anna S. Ryabova, Sergey Ya. Istomin, Antoine Bonnefont, Denis M. Antipin, Filipp S. Napolskiy, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Moscow State Regional University., Université Louis Pasteur - Laboratoire Decomet (UMR 7177-LC3), Université Louis Pasteur - Strasbourg I-Commencez à saisir le nom d'une tutelle, N. S. Kurnakov Institute of General and Inorganic Chemistry (IGIC), Russian Academy of Sciences [Moscow] (RAS), University of Antwerp (UA), and univOAK, Archive ouverte
- Subjects
General Chemical Engineering ,Inorganic chemistry ,chemistry.chemical_element ,02 engineering and technology ,Crystal structure ,Manganese ,Meanfield kinetic modeling ,010402 general chemistry ,Electrocatalyst ,01 natural sciences ,Catalysis ,Transition metal ,Electrochemistry ,Interfacial Red-ox transition ,Manganese oxides ,Chemistry ,Physics ,Rational design ,[CHIM.CATA] Chemical Sciences/Catalysis ,[CHIM.CATA]Chemical Sciences/Catalysis ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Rotating disc electrode (RDE) ,Electrode ,Oxygen reduction reaction (ORR) ,Cyclic voltammetry ,0210 nano-technology - Abstract
Knowledge on the mechanisms of oxygen reduction reaction (ORR) and descriptors linking the catalytic activity to the structural and electronic properties of transition metal oxides enable rational design of more efficient catalysts. In this work ORR electrocatalysis was studied on a set of single and complex Mn (III) oxides with a rotating disc electrode method and cyclic voltammetry. We discovered an exponential increase of the specific electrocatalytic activity with the potential of the surface Mn(IV)/Mn(III) red-ox couple, suggesting the latter as a new descriptor for the ORR electrocatalysis. The observed dependence is rationalized using a simple mean-field kinetic model considering availability of the Mn( III) centers and adsorbate-adsorbate interactions. We demonstrate an unprecedented activity of Mn2O3, ca. 40 times exceeding that of MnOOH and correlate the catalytic activity of Mn oxides to their crystal structure. (C) 2015 Elsevier Ltd. All rights reserved.
- Published
- 2016
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