Active Ensembles in Methane Dehydroaromatization over Molybdenum/ZSM‐5 Zeolite Identified by 2D 1H−95Mo Magic Angle Spinning Nuclear Magnetic Resonance Correlation Spectroscopy

Author:

Gao Wei12,Wang Qiang1,Qi Guodong1,Liang Jiawei12,Wang Chao1,Xu Jun1ORCID,Deng Feng1

Affiliation:

1. National Center for Magnetic Resonance in Wuhan State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Innovation Academy for Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 P. R. China

2. University of Chinese Academy of Sciences Beijing 100049 P. R. China

Abstract

AbstractMethane dehydroaromatization (MDA) over Mo‐modified zeolite is a potential catalytic route for converting natural gas into valuable aromatics. However, the active species in this reaction are highly complex, involving diverse Mo species, acidic sites of zeolite, and organic molecules. Herein, we apply 1D 95Mo NMR and 2D 1H‐95Mo heteronuclear correlation solid‐state NMR spectroscopy to directly observe the active ensembles in the confined channels of Mo/ZSM‐5 zeolite during the MDA reaction. We monitor the evolution of the spatial correlations of Mo species with the Brønsted acid sites and organic products (olefins and aromatics) in the zeolite channels. We identified two kinds of MoOxCy species, with the more carbidic one (MoOxCy‐II) exhibiting higher activity for methane activation and benzene formation. The strong spatial interactions between the active Mo species and the organic species in the Mo/ZSM‐5 pores are related to the MDA activity.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Natural Science Foundation of Hubei Province

Youth Innovation Promotion Association of the Chinese Academy of Sciences

Publisher

Wiley

Subject

General Medicine

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Advanced solid-state NMR spectroscopy and its applications in zeolite chemistry;Progress in Nuclear Magnetic Resonance Spectroscopy;2024-04

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