Preparation of a novel copper catalyst in terms of the immiscible interaction between copper and chromium

Satoshi Kameoka, Mika Okada, Ampo Sai

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Based on the metallurgical point of view, we aimed to design a new form of copper catalysts with high thermal stability and activity. Delafossite CuCrO 2 has been studied as a precursor for copper catalyst. The CuCrO 2 was reduced to fine dispersion of Cu and Cr 2 O 3 particles with porous structure by the treatment in H 2 at 600 °C, which exhibited much higher activity and thermal stability for steam reforming of methanol (SRM) than those of the CuO and/or Cr 2 O 3 catalysts. Sintering of Cu particles was significantly suppressed even after H 2 reduction at 600 °C. Moreover, the CuCrO 2 can be regenerated by calcination in air at 1,000 °C where the activity is also restored completely even after sintering at high temperatures. Fine porous structure generated by the reduction of CuCrO 2 and immiscible interaction between Cu and Cr 2 O 3 are important in stabilizing of copper nanoparticles. Based on these findings, we propose that the CuCrO 2 is an effective precursor for a high performance copper catalyst.

Original languageEnglish
Pages (from-to)252-256
Number of pages5
JournalCatalysis Letters
Volume120
Issue number3-4
DOIs
Publication statusPublished - 2008 Jan 1

Keywords

  • CuCrO
  • Delafossite
  • Immiscible
  • Methanol steam reforming
  • Porous structure
  • Reversible
  • Thermal stability

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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