Chinese Academy of Sciences publishes in situ solid-state nuclear magnetic resonance application in heterogeneous catalytic reactions

In-situ solid-state NMR for heterogeneous catalysis: a joint experimental and theoretical approach in the recently published Chemical Society Published in Reviews (2012, 41, 192-210).

The article summarizes the important progress made by the research team in the field of heterogeneous catalysis using in-situ solid-state nuclear magnetic resonance technology in the past decade. The article introduces the in-situ solid-state NMR method and its application in acid characterization, catalytic reaction mechanism and reaction kinetics, and emphasizes the important role of experiments combined with theoretical calculations in determining the structure and reaction mechanism of reaction intermediates.

In recent years, the 502 research group of the Dahua Institute has devoted itself to the development of in-situ solid-state nuclear magnetic resonance methods and nuclear magnetic resonance signal sensitivity enhancement techniques, and has achieved some important results in the field of catalytic reactions and material characterization. For example, in cooperation with the Northwest Pacific National Laboratory in the United States, high-field 95Mo NMR (21.1 Tesla) was used to study molybdenum carbide active species in the methane aromatization reaction. The relevant results were published in the Journal of the American Chemical Society (J. Am. Chem. Soc., 130 (2008) 3722-3723); a set of self-developed dynamic catalytic reaction system coupled with a solid-state nuclear magnetic resonance instrument, using laser Induced hyperpolarization 129Xe technology, for the first time directly observed the diffusion and dehydration process of methanol molecules in the pores of CHA molecular sieve with a pore diameter of 0.8nm under simulated catalytic reaction conditions, and accurately obtained the molecular diffusion and reaction kinetic parameters. Related methods and experimental results were published in the form of a research paper (Article) in the Journal of the American Chemical Society (J. Am. Chem. Soc., 131 (2009) 13722-13727), which is considered to be a "catalytic reaction for nanopore Research on inventions of great significance ".

In addition, the research group has been working on the combination of basic catalysis and applied catalysis. In cooperation with the Comprehensive Utilization of Low-Carbon Hydrocarbons and Zeolite Catalysis Materials Group (DNL0804 Group), the NMR disproportionation reaction and the structure of co-crystal molecular sieve were thoroughly studied using solid-state nuclear magnetic resonance technology. Related work was published in J. Catal., J. Phys. Chem. C and other publications. In cooperation with the New Catalysis Process Group for the Conversion of Methane and Low Carbon Hydrocarbons (Group DNL0802), important progress has also been made in the field of ionic liquid synthesis of molecular sieves. Related work was published in Chem. Eur. J., Phys. Chem. Chem. Phys. And other publications.

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