Effect of the annealing atmosphere on the electrochemical properties of RuO 2 nano-oxides synthesized by the Instant Method
| Autor: | Claude Lamy, Stève Baranton, Christophe Coutanceau, Thomas Audichon, Marc Cretin, Benoît Guenot |
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| Přispěvatelé: | Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC), Institut Européen des membranes (IEM), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Annealing (metallurgy) Process Chemistry and Technology Inorganic chemistry Oxygen evolution 02 engineering and technology [CHIM.CATA]Chemical Sciences/Catalysis Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Ruthenium oxide 0104 chemical sciences Amorphous solid 13. Climate action [CHIM]Chemical Sciences Cyclic voltammetry 0210 nano-technology Inert gas Voltammetry ComputingMilieux_MISCELLANEOUS General Environmental Science |
| Zdroj: | Applied Catalysis B: Environmental Applied Catalysis B: Environmental, Elsevier, 2017, 218, pp.385-397. ⟨10.1016/j.apcatb.2017.06.081⟩ |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2017.06.081⟩ |
| Popis: | Ruthenium oxide materials have been synthesized by an “Instant method” assisted by microwave irradiation. The “as-synthesized” material has been annealed at different temperatures from 200 °C to 450 °C, under different atmospheres, air and nitrogen. The different samples were characterized by X-ray diffraction, transmission electron microscopy and cyclic voltammetry (capacitance, charges involved, etc.). The physicochemical and electrochemical characterizations have evidenced that the main effect of the annealing atmosphere is the modification of the transition temperature from an amorphous hydrated phase to a crystalline phase of ruthenium oxide (ca. 300 °C under air and ca. 350 °C under inert atmosphere according to XRD measurement). The activity of the different catalysts towards the oxygen evolution reaction was evaluated by linear scan voltammetry. In the high overpotential region (E > 1.6 V vs. RHE), higher catalytic activities were obtained after annealing at high temperatures, i.e. 400–450 °C, independently on the annealing atmosphere. In the low overpotential region (E |
| Databáze: | OpenAIRE |
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