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

被引：17

作者：

Itadani, Atsushi ^{[1
]}

Sugiyama, Hiroyuki ^{[1
]}

Tanaka, Masashi ^{[1
]}

Mori, Toshinori ^{[1
]}

Nagao, Mahiko ^{[1
]}

Kuroda, Yasushige ^{[1
]}

机构：

[1] Okayama Univ, Grad Sch Nat Sci & Technol, Dept Fundamental Mat Sci, Okayama 7008530, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 45期

关键词：

D O I：

10.1021/jp076944t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The N-2 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 N-2 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 N-2, and also by spectroscopic methods, such as photoluminescence, X-ray absorption fine structure, and IR measurements. Clear evidence was observed for the adsorption of N-2 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.

引用

页码：16701 / 16705

页数：5

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