Dynamic characterization of inter and intralamellar domains of Cobalt-based layered double hydroxides upon electrochemical oxidation
| Autor: | Fabrice Leroux, Ozlem Sel, Christine Taviot-Guého, Fatemeh Razzaghi, Ulla Gro Nielsen, Hubert Perrot, Erik Elkaim, Nicholai Daugaard Jensen, Christine Mousty, Sophie Peulon, Pierre Vialat |
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| Přispěvatelé: | Institut de Chimie de Clermont-Ferrand (ICCF), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Sigma CLERMONT (Sigma CLERMONT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), University of Southern Denmark (SDU), Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement (LAMBE - UMR 8587), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Université d'Évry-Val-d'Essonne (UEVE)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement (LAMBE), Université Paris-Seine-Université Paris-Seine-Université d'Évry-Val-d'Essonne (UEVE)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Seine-Université Paris-Seine-Université d'Évry-Val-d'Essonne (UEVE)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | dánština |
| Rok vydání: | 2016 |
| Předmět: |
Layered double hydroxides
General Chemical Engineering Diffusion Inorganic chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology Electrolyte engineering.material 010402 general chemistry Electrochemistry 01 natural sciences Redox Materials Chemistry [CHIM]Chemical Sciences Voltammetry General Chemistry Quartz crystal microbalance 021001 nanoscience & nanotechnology 0104 chemical sciences Electrochemical oxidation chemistry engineering [CHIM.OTHE]Chemical Sciences/Other 0210 nano-technology Cobalt |
| Zdroj: | Taviot-Gueho, C, Vialet, P, Leroux, F, Razzaghi, F, Perrot, H, Sel, O, Jensen, N D, Nielsen, U G, Peulon, S, Elkaim, S & Mousty, C 2016, ' Dynamic characterization of inter and intralamellar domains of Cobalt-based layered double hydroxides upon electrochemical oxidation ', Chemistry of Materials, bind 28, nr. 21, s. 7793-7806 . https://doi.org/10.1021/acs.chemmater.6b03061 Chemistry of Materials Chemistry of Materials, American Chemical Society, 2016, 28 (21), pp.7793-7806. ⟨10.1021/acs.chemmater.6b03061⟩ Chemistry of Materials, 2016, 28 (21), pp.7793-7806. ⟨10.1021/acs.chemmater.6b03061⟩ |
| ISSN: | 0897-4756 1520-5002 |
| Popis: | International audience; This work investigated in situ changes in the structure of the layered double hydroxides (LDH) during electrochemical processes as well as followed the ion motion related to the charge balancing process. Electrogravimetric measurements, using an electrochemical quartz crystal microbalance (EQCM), allowed one to monitor simultaneously changes in current and in microbalance frequency when electroactive films of Co2Al–NO3 LDH were subjected to voltammetry potential cycling in alkaline solutions (0.1 M COH, C = Li+, Na+, and K+). EQCM results showed a strong dependence of the electrochemical process on the nature of electrolyte cations. Operando X-ray diffraction measurements, carried out during potential cycling of Co2Al–NO3 films in KOH electrolyte, showed the diffusion of OH– species gradually replacing NO3–. Total X-ray scattering experiments recorded ex situ on Co2Al–NO3 after successive oxidation and reduction revealed the presence of a high level of structural disorders even in the pristine material. A quantitative analysis of the local distribution of the cations by the analysis of the pair distribution functions highlighted the presence of different Co sites with distinct modification of Co–OH distances in the first coordination shells after oxidation/reduction. |
| Databáze: | OpenAIRE |
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