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 journalArticlepeer-review

12 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

Bibliographical note

Funding Information:
Acknowledgments This research was supported by the Global Research Laboratory Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning of Republic of Korea. Part of this research was also supported by the Fundamental Technology Development Programs for the Future through the Korea Institute of Science and Technology.

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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