Ceria-doped Ni/SBA-16 catalysts for dry reforming of methane

Shenghong Zhang, Satoshi Muratsugu, Nozomu Ishiguro, Mizuki Tada

Research output: Contribution to journalArticlepeer-review

224 Citations (Scopus)

Abstract

Ni-ceria nanoparticles (Ni/Ce = 1/1) in the cage-like pores of SBA-16 were prepared and evaluated in methane dry reforming reactions. Coexistence of ceria in NiCe/SBA-16 resulted in forming uniformly sized Ni particles (av. 5.7 nm) within the mesopores of SBA-16, because of the confinement effect from the framework of SBA-16 and the strong interaction between Ni and ceria. Ceria addition facilitated the reduction of NiCe/SBA-16 compared with Ni/SBA-16, and Ce3+ was the dominant species in both fresh and used NiCe/SBA-16 catalysts, as determined by Ce LIII-edge X-ray absorption near-edge structure (XANES). The methane conversion was much more stable on NiCe/SBA-16 than on Ni/CeO2 and Ni/SBA-16 in the methane dry reforming at 973 K during a 100 h reaction period; the deactivation of the Ni catalyst and the collapse of the SBA-16 framework were preferably suppressed for NiCe/SBA-16 under the reaction conditions. The remarkable effect of ceria on the structural stability of both the active Ni particles and the SBA-16 framework led to the consistent catalytic performance of NiCe/SBA-16 in methane dry reforming.

Original languageEnglish
Pages (from-to)1855-1864
Number of pages10
JournalACS Catalysis
Volume3
Issue number8
DOIs
Publication statusPublished - 2013 Aug 2
Externally publishedYes

Keywords

  • ceria
  • mesoporous support
  • methane dry reforming
  • nickel catalyst
  • SBA-16
  • XAFS

ASJC Scopus subject areas

  • Catalysis

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