New information related to the adsorption model of N2 on CuMFI at room temperature

Atsushi Itadani, Hiroyuki Sugiyama, Masashi Tanaka, Toshinori Mori, Mahiko Nagao, Yasushige Kuroda

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The N2 adsorption occurring at temperatures around room temperature is a particularly surprising phenomenon given by the copper ion-exchanged MFI-type zeolite (CuMFI). However, the assignment of the active sites for N2 adsorption on CuMFI at room temperature is controversial: which ones act as the real active center, the dimeric or monomeric Cu+ sites? We have analyzed the real active site for N 2 adsorption by studying the adsorption of CO and N2, and also by spectroscopic methods, such as photoluminescence, X-ray absorption fine structure, and IR measurements. Clear evidence was observed for the adsorption of N2 molecules on the monomeric Cu+ ions exchanged in the MFI-type zeolite at temperatures around room temperature, which puts to an end the dispute regarding the dimeric state made up of the monovalent copper ions as being a potential adsorption site.

Original languageEnglish
Pages (from-to)16701-16705
Number of pages5
JournalJournal of Physical Chemistry C
Volume111
Issue number45
DOIs
Publication statusPublished - Nov 15 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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