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Copper-Substituted NiTiO3 Ilmenite-Type Materials for Oxygen Evolution Reaction

  • Amandine Guiet
    Amandine Guiet
    Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
  • Tran Ngoc Huan
    Tran Ngoc Huan
    Laboratoire de Chimie des Processus Biologiques, Collège de France, UMR CNRS 8229, Sorbonne Université, PSL Research University, 11 place Marcelin Berthelot, 75005 Paris, France
  • Christophe Payen
    Christophe Payen
    Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes cedex 3, France
  • Florence Porcher
    Florence Porcher
    Laboratoire Léon Brillouin, CEA-CNRS, 91191 Gif-sur-Yvette Cedex, France
  • Victor Mougel
    Victor Mougel
    Laboratoire de Chimie des Processus Biologiques, Collège de France, UMR CNRS 8229, Sorbonne Université, PSL Research University, 11 place Marcelin Berthelot, 75005 Paris, France
  • Marc Fontecave*
    Marc Fontecave
    Laboratoire de Chimie des Processus Biologiques, Collège de France, UMR CNRS 8229, Sorbonne Université, PSL Research University, 11 place Marcelin Berthelot, 75005 Paris, France
    *E-mail: [email protected] (M.F.).
  • , and 
  • Gwenaël Corbel*
    Gwenaël Corbel
    Institut des Molécules et Matériaux du Mans, UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
    *E-mail: [email protected] (G.C.).
Cite this: ACS Appl. Mater. Interfaces 2019, 11, 34, 31038–31048
Publication Date (Web):August 5, 2019
https://doi.org/10.1021/acsami.9b08535
Copyright © 2019 American Chemical Society
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Abstract

Single Ni1–xCuxTiO3 (0.05 ≤ x ≤ 0.2) Ilmenite-type phases were successfully prepared through a solid-state reaction route using divalent metal nitrates as precursors and characterized. Their electrocatalytic performance for oxygen evolution reaction (OER) in alkaline media is presented. The Cu content was determined (0.05 ≤ x ≤ 0.2) by X-ray diffraction. A thorough powder neutron diffraction study was carried out to identify the subtle changes caused by copper substitution in the structure of NiTiO3. The evolution of the optical and magnetic properties with the Cu content was also investigated on the raw micrometer-sized particles. A reduction in particle size down to ≈15 nm was achieved by ball-milling the raw powder prepared by the solid-state reaction. The best catalytic activity for OER was obtained for nanometer-sized particles of Ni0.8Cu0.2TiO3 drop-casted on the Cu plate. For this electrode, a current density of 10 mA cm–2 for oxygen production was generated at 345 and 470 mV applied overpotentials with 1 and 0.1 M NaOH solutions as electrolytes, respectively. The catalyst retained this OER activity at 10 mA cm–2 for long-term electrolysis with a faradic efficiency of 90% for O2 production in a 0.1 M NaOH electrolyte.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsami.9b08535.

  • CCDC 1915348 (Ni0.95Cu0.05TiO3), CCDC 1915335 (Ni0.90Cu0.10TiO3), CCDC 1915349 (Ni0.85Cu0.15TiO3), and CCDC 1915350 (Ni0.8Cu0.2TiO3) (PDF)

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