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Development of Infrared Spectroscopic In Situ Characterization System Under High and Low Temperature Environments
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摘要: 研制的高低温环境下红外光谱原位表征系统将红外光谱同高低温原位红外体系组合起来，为高低温原位红外反应机理的深入研究提供有效信息，同时为构建高效稳定的原位红外研究提供新的技术支撑. 高低温环境下红外光谱原位表征系统通过液氮制冷与加热调控，在真空或常压的状态下为光谱测量提供低温恒温环境，并可在一定的温度范围内提供可进行原位预处理或原位反应的高温环境. 高低温环境下红外光谱原位表征系统可以适用于任何物质研究，尤其适用于液氮环境下气体吸附研究，比如反应中间体的过程捕捉、探针分子弱吸附方面的研究、单原子催化剂的鉴定以及探针分子吸附表征等. 因而高低温环境下红外光谱原位表征系统在这些领域具有极高的通用性和实用性.Abstract: The developed infrared spectroscopic in situ characterization system under high and low temperature environments combines infrared spectroscopy with high and low temperature in situ infrared system, which provides effective information for in-depth study of high and low temperature in situ infrared reaction mechanism, and provides new technical support for the construction of efficient and stable in situ infrared research. The infrared spectroscopic in situ characterization system under high and low temperature environments provides a low temperature and constant temperature environment for spectral measurement under vacuum or atmospheric pressure through liquid nitrogen refrigeration and heating regulation, and can provide in situ pretreatment or in situ reaction within a certain temperature range of high temperature environment. The infrared spectroscopic in situ characterization system in high and low temperature environments can be applied to the study of any material. It is especially used for gas adsorption studies in liquid nitrogen environment, such as the process capture of reaction intermediates, the studies on weak adsorption of probe molecules, the identification of single-atom catalysts and the adsorption characterization of probe molecules, etc. Therefore, infrared spectroscopic in situ characterization system in high and low temperature environments are extremely high versatility and practical in these fields.
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图 1 高低温环境下红外光谱原位表征系统技术路线图
Figure 1. Technology roadmap of infrared spectroscopic in situ characterization system under high and low temperature environments
图 2 高低温原位红外池设计加工草图
Figure 2. Design and processing sketch of high and low temperature in situ infrared cell
图 3 高低温原位红外池俯视和整体透视设计加工草图
Figure 3. Top view and overall perspective design processing sketch of high and low temperature in situ infrared cell
图 5 高低温原位红外池设计效果图
Figure 5. Design rendering of high and low temperature in situ infrared cell
图 7 腔帽设计加工俯视图和实物图
Figure 7. Top view and physical drawings of cavity cap design and machining
图 9 （a）铜催化剂低温吸附CO，（b）铜催化剂在不同分压下吸附CO
Figure 9. (a) Low temperature adsorption of CO by copper catalyst, (b) adsorption of CO by copper catalysts at different partial pressures
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