Methanation of carbon dioxide on catalysts derived from amorphous Ni-Zr-rare earth element alloys

H. Habazaki, T. Yoshida, M. Yamasaki, M. Komori, K. Shimamura, E. Akiyama, A. Kawashima, K. Hashimoto

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The nano-grained Ni/ZrO2 catalysts containing rare earth element oxides were prepared by oxidation-reduction pretreatment of amorphous Ni-(40-x) at% Zr-x at% rare earth element (Y, Ce and Sm; x=1-10) alloy precursors. The conversion of carbon dioxide on the catalysts containing 1 at% rare earth elements was almost the same as that on the rare earth element-free catalyst, but the addition of 5 at% or more rare earth elements increased remarkably the conversion at 473 K. In contrast to the formation of monoclinic and tetragonal ZrO2 during pretreatment of amorphous Ni-Zr alloys containing 1 at% rare earth elements, tetragonal ZrO2, which is generally stable only at high temperatures, was predominantly formed during the pretreatment of the catalysts containing 5 at% or more rare earth elements. The surface area of the catalysts increased with the content of rare earth element. Thus, the increase in the surface area and stabilization of tetragonal ZrO2 seem to be responsible for the improvement of catalytic activity of the Ni-Zr alloy-derived catalysts by the addition of rare earth elements.

Original languageEnglish
Pages (from-to)261-266
Number of pages6
JournalStudies in Surface Science and Catalysis
Volume114
Publication statusPublished - 1998 Jan 1

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Habazaki, H., Yoshida, T., Yamasaki, M., Komori, M., Shimamura, K., Akiyama, E., Kawashima, A., & Hashimoto, K. (1998). Methanation of carbon dioxide on catalysts derived from amorphous Ni-Zr-rare earth element alloys. Studies in Surface Science and Catalysis, 114, 261-266.