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    Application scenarios of far-infrared spectroscopy
    Publisher：Shanghai Jinghongkepu Optoelectronics Technology Co., Ltd Release time：2025-01-13 15:39:15 Click count：19 Close
    Application of in-situ infrared spectroscopy in the study of reaction mechanism

    For a long time, people have studied the adsorption states of various molecules on catalyst surfaces and obtained many important information, but this information was measured before the reaction occurred. However, the types, structures, and properties of adsorbed species under reaction conditions are significantly different from those under adsorption conditions. Therefore, relying solely on the information of adsorbed species measured under adsorption conditions cannot accurately elucidate the reaction mechanism. Therefore, it is necessary to conduct research on adsorbed species under reaction conditions. However, under the reaction conditions, not all species adsorbed on the catalyst surface participate in the reaction, so it is very important to identify the "intermediate species" involved in the reaction among multiple adsorbed species. In situ infrared spectroscopy can measure the dynamic behavior of adsorbed species on catalysts in reaction states, thus obtaining dynamic information of surface species on catalysts and inferring reaction mechanisms based on this.

    Catalyst characterization is crucial for understanding the changes in catalyst structure and composition that occur during pretreatment, induction period, reaction conditions, and regeneration process. The knowledge of catalytic reaction mechanisms, especially the structure, dynamics, and energetics of reaction intermediates generated along the catalytic reaction pathway, can provide a deeper understanding for the development of new catalysts and the improvement of existing catalysts. In situ spectroscopic observation is the most effective technique for elucidating reaction mechanisms, the dynamics of molecular catalyst interactions, and intermediate structures. These studies can also provide thermodynamic information on the interaction between catalysts and substrates, as well as on the activation potential barrier. The study of reaction mechanisms and kinetics, especially the in-situ observation of intermediates in catalytic reactions, is essential for the development of catalytic science. Because such research results provide comprehensive knowledge of catalytic action and help clarify the relationship between catalyst structure and function.
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