Identification of Fe2(μ-O) and Fe2(μ-O) 2 sites in Fe/ZSM-35 by in situ resonance Raman spectroscopy

Junying Wang; Guanna Li; Xiaohua Ju; Haian Xia; Fengtao Fan; Junhu Wang; Zhaochi Feng; Can Li

doi:10.1016/j.jcat.2013.01.023

Identification of Fe₂(μ-O) and Fe₂(μ-O) ₂ sites in Fe/ZSM-35 by in situ resonance Raman spectroscopy

Junying Wang
, Guanna Li
, Xiaohua Ju
, Haian Xia
, Fengtao Fan
, Junhu Wang
, Zhaochi Feng^*
, Can Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

25 Citations (Scopus)

Abstract

The structure of the active iron site in Fe/ZSM-35 was investigated by in situ resonance Raman spectroscopy combined with Mössbauer spectroscopy and DFT calculations. In situ UV resonance Raman spectra coupled with ⁵⁷Fe Mössbauer spectra suggest that the active Fe site for N₂O decomposition is an Fe₂(μ-O) site, characterized by a Raman band at 875 cm^-1. In situ visible resonance Raman spectra reveals the formation of an Fe₂(μ-O)₂ site with a feature Raman band at 730 cm^-1 upon N₂O reacts with the Fe₂(μ-O) site. The Raman band intensity at 730 cm^-1 is decreasing after exposing the Fe₂(μ-O)₂ site to CH ₄ due to the formation of methoxide species which mimics the biocatalysis of soluble methane monooxygenase (sMMO).

Original language	English
Pages (from-to)	77-82
Number of pages	6
Journal	Journal of Catalysis
Volume	301
DOIs	https://doi.org/10.1016/j.jcat.2013.01.023
Publication status	Published - May 2013
Externally published	Yes

Keywords

Active iron site
Fe/ZSM-35
Resonance Raman spectroscopy

Access to Document

10.1016/j.jcat.2013.01.023Licence: Publisher

Cite this

@article{a144f05ac9a24529a3f0a0bd311eac38,

title = "Identification of Fe2(μ-O) and Fe2(μ-O) 2 sites in Fe/ZSM-35 by in situ resonance Raman spectroscopy",

abstract = "The structure of the active iron site in Fe/ZSM-35 was investigated by in situ resonance Raman spectroscopy combined with M{\"o}ssbauer spectroscopy and DFT calculations. In situ UV resonance Raman spectra coupled with 57Fe M{\"o}ssbauer spectra suggest that the active Fe site for N2O decomposition is an Fe2(μ-O) site, characterized by a Raman band at 875 cm-1. In situ visible resonance Raman spectra reveals the formation of an Fe2(μ-O)2 site with a feature Raman band at 730 cm-1 upon N2O reacts with the Fe2(μ-O) site. The Raman band intensity at 730 cm-1 is decreasing after exposing the Fe2(μ-O)2 site to CH 4 due to the formation of methoxide species which mimics the biocatalysis of soluble methane monooxygenase (sMMO).",

keywords = "Active iron site, Fe/ZSM-35, Resonance Raman spectroscopy",

author = "Junying Wang and Guanna Li and Xiaohua Ju and Haian Xia and Fengtao Fan and Junhu Wang and Zhaochi Feng and Can Li",

year = "2013",

month = may,

doi = "10.1016/j.jcat.2013.01.023",

language = "English",

volume = "301",

pages = "77--82",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Elsevier",

}

TY - JOUR

T1 - Identification of Fe2(μ-O) and Fe2(μ-O) 2 sites in Fe/ZSM-35 by in situ resonance Raman spectroscopy

AU - Wang, Junying

AU - Li, Guanna

AU - Ju, Xiaohua

AU - Xia, Haian

AU - Fan, Fengtao

AU - Wang, Junhu

AU - Feng, Zhaochi

AU - Li, Can

PY - 2013/5

Y1 - 2013/5

N2 - The structure of the active iron site in Fe/ZSM-35 was investigated by in situ resonance Raman spectroscopy combined with Mössbauer spectroscopy and DFT calculations. In situ UV resonance Raman spectra coupled with 57Fe Mössbauer spectra suggest that the active Fe site for N2O decomposition is an Fe2(μ-O) site, characterized by a Raman band at 875 cm-1. In situ visible resonance Raman spectra reveals the formation of an Fe2(μ-O)2 site with a feature Raman band at 730 cm-1 upon N2O reacts with the Fe2(μ-O) site. The Raman band intensity at 730 cm-1 is decreasing after exposing the Fe2(μ-O)2 site to CH 4 due to the formation of methoxide species which mimics the biocatalysis of soluble methane monooxygenase (sMMO).

AB - The structure of the active iron site in Fe/ZSM-35 was investigated by in situ resonance Raman spectroscopy combined with Mössbauer spectroscopy and DFT calculations. In situ UV resonance Raman spectra coupled with 57Fe Mössbauer spectra suggest that the active Fe site for N2O decomposition is an Fe2(μ-O) site, characterized by a Raman band at 875 cm-1. In situ visible resonance Raman spectra reveals the formation of an Fe2(μ-O)2 site with a feature Raman band at 730 cm-1 upon N2O reacts with the Fe2(μ-O) site. The Raman band intensity at 730 cm-1 is decreasing after exposing the Fe2(μ-O)2 site to CH 4 due to the formation of methoxide species which mimics the biocatalysis of soluble methane monooxygenase (sMMO).

KW - Active iron site

KW - Fe/ZSM-35

KW - Resonance Raman spectroscopy

U2 - 10.1016/j.jcat.2013.01.023

DO - 10.1016/j.jcat.2013.01.023

M3 - Article

AN - SCOPUS:84875970727

SN - 0021-9517

VL - 301

SP - 77

EP - 82

JO - Journal of Catalysis

JF - Journal of Catalysis