Direct observation of the active center for methane dehydroaromatization using an ultrahigh field 95Mo NMR spectroscopy

Heng Zheng; Ding Ma; Xinhe Bao; Jian Zhi Hu; Ja Hun Kwak; Yong Wang; Charles H F Peden

doi:10.1021/ja7110916

Direct observation of the active center for methane dehydroaromatization using an ultrahigh field 95Mo NMR spectroscopy

J Am Chem Soc. 2008 Mar 26;130(12):3722-3. doi: 10.1021/ja7110916. Epub 2008 Mar 1.

Authors

Heng Zheng¹, Ding Ma, Xinhe Bao, Jian Zhi Hu, Ja Hun Kwak, Yong Wang, Charles H F Peden

Affiliation

¹ State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China.

PMID: 18311978
DOI: 10.1021/ja7110916

Abstract

The use of an ultrahigh magnetic field spectrometer and 95Mo isotope enrichment facilitate the direct observation of the local structure of Mo species on Mo/zeolite catalysts by 95Mo NMR. Top trace: The experimental 95Mo NMR spectrum of 6Mo/HZSM-5. Bottom traces: The simulated overall spectrum (orange), the spectral component corresponding to MoO3 (purple), and the component corresponding to the exchanged Mo species (green). The exchanged Mo species proved to be the active center for the methane dehydroaromatization (MDA) reaction.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Hydrocarbons, Aromatic / chemical synthesis*
Hydrocarbons, Aromatic / chemistry
Isotopes
Magnetic Resonance Spectroscopy / methods*
Methane / chemistry*
Molybdenum / chemistry*
Organometallic Compounds / chemical synthesis
Organometallic Compounds / chemistry
Sensitivity and Specificity
Zeolites / chemistry*

Substances

Hydrocarbons, Aromatic
Isotopes
Organometallic Compounds
Zeolites
Molybdenum
Methane