Catalytic hydrogen production via dry reforming of methane over Ni/Ce 0.65Hf0.25M0.1O2-δ (M = Tb, Sm, Nd, Pr and La)

D. Harshini, Dae Hyung Lee, Yongmin Kim, Suk Woo Nam, Jong Hee Han, Hyung Chul Ham, Chang Won Yoon

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Ni/Ce0.65Hf0.25M0.1O2-δ (Ni/CH-M, M = Tb, Sm, Nd, Pr, and La), Ni-based catalysts supported on CeO 2-HfO2 materials incorporated with rare earth elements, were prepared by a solvothermal method. The resulting catalysts were found to have surface areas ranging from 41 to 47 m2/g, and they proved to possess strong metal-to-support interactions, as evidenced by temperature programmed reduction analyses. Upon utilization of these catalysts for dry reforming of methane (DRM) with a CH4/CO2 ratio of 1 at a range of 600 to 900 C, the Ni/CH-M catalysts were found to have higher activities than the Ni/CH catalyst. In addition, the activities proved to increase in the order of Ni/CH-Pr > Ni/CH-La ~ Ni/CH-Tb > Ni/CH-Nd ~ Ni/CH-Sm > Ni/CH. With a high CH4/CO2 ratio of 2, these Ni/CH-M materials showed better stabilities than the Ni/CH catalyst in the DRM reaction at 800 C for 150 h. Moreover, the Ni/CH-M (M = Pr, Tb, and La) catalysts exhibited superior durability over other Ni materials. Consistent with the observations, transmission electron microscopy further confirmed that no carbon species were observed in the Ni/CH-M (M = Pr, Tb, and La) catalysts following the reforming reactions. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)656-662
Number of pages7
JournalCatalysis Letters
Volume144
Issue number4
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Carbon dioxide
  • Ceria-hafnia
  • Heterogeneous catalyst
  • Methane dry reforming
  • Oxygen storage capacity
  • Rare-earth elements

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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