Additive effect of alkali metal ions on preferential CO oxidation over Pt/Al2O3

Yuji Minemura, Masatoshi Kuriyama, Shin ichi Ito, Keiichi Tomishige, Kimio Kunimori

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

In the preferential CO oxidation under H2-rich gas, CO conversion and selectivity of CO oxidation were enhanced by the addition of alkali metal ions (M = Li, Na, K, Rb, Cs) to Pt/Al2O3 in the range of the molar ratio (M/Pt) lower than 3, and TOFs monotonously increased along with the basicity strength of added alkali metal ions. In contrast, in the range of M/Pt ≥ 5, the order of additive effect was K > Na > Rb > Cs. This can be related to a moderate strength of basicity of potassium. In addition, the promoting effect of the presence of H2 on CO oxidation was also clearly observed on K-Pt/Al2O3.

Original languageEnglish
Pages (from-to)623-626
Number of pages4
JournalCatalysis Communications
Volume7
Issue number9
DOIs
Publication statusPublished - 2006 Sep

Keywords

  • Alkali metal ions
  • Basicity
  • Platinum
  • Potassium
  • Preferential CO oxidation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

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