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Bifunctional electrocatalysts for oxygen reduction/evolution reactions derived from NiCoFe LDH materials

Journal of Applied Electrochemistry, ISSN: 1572-8838, Vol: 48, Issue: 8, Page: 947-957
2018
  • 16
    Citations
  • 0
    Usage
  • 19
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    16
    • Citation Indexes
      16
  • Captures
    19

Article Description

Abstract: Materials obtained from thermal treatment of thermally treated NiCoFe-layered double hydroxides (LDH) with different Ni:Co ratios were evaluated as bifunctional catalysts for Oxygen Reduction Evolution and Evolution Reduction Reactions in alkaline media. The structural properties of synthesized materials were characterized by X-ray diffraction, Fourier-transform infrared, Raman, and X-ray photoelectron spectroscopies, whereas the basicity of each material was evaluated by temperature-programmed desorption of carbon dioxide. The results revealed the presence of inverse spinel structure with different compositions and a NiO phase with different amounts in the sample, while the electrochemical results showed a high activity towards oxygen reactions. The sample with higher amount of NiO and the lowest substitution grade on tetrahedral sites in the spinel-type structure exhibited the best catalytic activity. Graphical Abstract: [Figure not available: see fulltext.].

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