1 Citation (Scopus)

Abstract

A series of 5%Ni-CexZr1-xO2 (x = 0.3, 0.5, 0.7) catalysts has been prepared via one-pot solvothermal continuous synthesis in supercritical isopropanol and incipient wetness impregnation of CexZr1-xO2 obtained by the same route. The textural, structural, red-ox, and catalytic properties in methane dry reforming (MDR) of Ni-modified Ce-Zr oxides synthesized by two routes have been compared. It was shown by XRD, TEM, and Raman spectroscopy that the method of Ni introduction does not affect the phase composition of the catalysts, but determines the dispersion of NiO. Despite a high dispersion of NiO and near-uniform distribution of Ni within Ce-Zr particles observed for the one-pot catalysts, they have shown a lower activity and stability in MDR as compared with impregnated ones. This is a result of a low Ni concentration in the surface layer due to segregation of Ce and decoration of nickel nanoparticles with support species.

Original languageEnglish
Article number3728
Number of pages20
JournalEnergies
Volume13
Issue number14
DOIs
Publication statusPublished - 20 Jul 2020

Keywords

  • Ce-Zr oxide
  • Methane dry reforming
  • Ni loading
  • Synthesis in supercritical isopropanol
  • methane dry reforming
  • ZIRCONIA
  • synthesis in supercritical isopropanol
  • ELECTRON-MICROSCOPY
  • TETRAGONAL PHASE
  • SUPPORT
  • NICKEL
  • CERIA
  • CONTINUOUS HYDROTHERMAL SYNTHESIS
  • NI
  • OXIDES
  • OXYGEN STORAGE CAPACITY

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