Core Viewpoint - The article discusses the development and application of a domestic in-situ infrared characterization system by Beifen Ruili, addressing the "bottleneck" issues faced by high-end domestic scientific instruments and promoting the advancement of domestic instruments in high-end research applications [1]. Group 1: Introduction - In-situ infrared spectroscopy (in situ IR) is a characterization technique that monitors the reaction process of samples by utilizing their infrared light absorption properties, widely applied in catalytic research [2]. - The Tianjin University Chemical Engineering College's large instrument testing platform introduced the domestic Fourier Transform Infrared Spectrometer (Model: WQF-530A) in September 2024, equipped with two in-situ detection systems for electrochemical, thermal, and photocatalytic reaction mechanism studies [2]. Group 2: Issues and Solutions During Testing - The in-situ infrared standard system faced several significant issues during initial use, including liquid nitrogen overflow affecting signal strength and internal condensation leading to contamination [3][4]. - The design of the infrared main unit was not fixed for in-situ testing, causing misalignment during frequent assembly and disassembly, which required realignment of the optical path [5]. - The software developed by Beifen Ruili had limitations, such as only displaying a single window with a maximum of 18 test spectra, which was not user-friendly for in-situ testing [6]. Group 3: Performance Verification of Domestic Instruments - The platform conducted comparative tests between domestic and imported instruments using Ru/CeZrO2 catalysts for CO2 methanation, finding that the domestic infrared system's detection signals were consistent with those of imported devices [14]. - The domestic infrared instrument demonstrated stability and reliability through various in-situ tests, including electrochemical CO2 reduction and photocatalytic CO2 conversion, yielding satisfactory results [15][18]. Group 4: Specific Application Cases - Case 1: The in-situ infrared system was used to explore the spatial regulation mechanism of organic cations in the CO2 reduction process, revealing significant changes in infrared absorption peaks with the addition of organic cations [21][23]. - Case 2: The ATR-SEIRAS characterization revealed the reaction pathway of Co3O4-modified Cu2+1O nanowires in the electrochemical reduction of nitrate to ammonia, providing evidence for the formation of intermediates [26][27]. - Case 3: The in-situ monitoring of P-doped In2O3 enhanced the photocatalytic reduction of CO2 to CH4, demonstrating the reaction pathway and the role of surface species [28][30]. Group 5: Conclusion - High-end scientific instruments require deep integration with specific research scenarios, and domestic high-end instruments are crucial for driving technological innovation in research institutions [31]. - The article emphasizes the importance of feedback from real research applications to promote iterative development and innovation in domestic scientific instruments [9].