Regulation of Ag1Cux/SBA-15 Catalyst for Efficient CO Catalytic Degradation at Room Temperature

作者：Fukun Bi, Haotian Hu, Zheng Ye, Yanxuan Wang, Yuxin Wang, Baolin Liu, Dong Han, Xiaodong Zhang · 发表于：Catalysts · 年份：2025 · DOI：10.3390/catal15070676 · 被引用次数：5 · 研究领域：Catalytic Processes in Materials Science、Advanced Photocatalysis Techniques、Nanomaterials for catalytic reactions

The regulation of the active sites of a catalyst is important for its application. Herein, a series of Ag1Cux/SBA-15 catalysts with different molar ratios of Ag to Cu were synthesized via the impregnation method, and the active sites of Ag1Cux were regulated via various pretreatment conditions. These as-prepared Ag1Cux/SBA-15 catalysts were characterized by many technologies, and their catalytic performance was estimated through CO catalytic oxidation. Among these catalysts, Ag1Cu0.025/SBA-15, with a Ag/Cu molar ratio of 1:0.025 and pretreated under the condition of 500 °C O2/Ar for 2 h, followed by 300 °C H2 for another 2 h, presented optimal CO degradation performance, which could realize the oxidation of 98% CO at 34 °C (T98 = 34 °C). Meanwhile, Ag1Cu0.025/SBA-15 also displayed great reusability. Characterization results, such as X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectra (UV-vis DRS), temperature-programmed H2 reduction (H2-TPR), and physical adsorption, suggested that the optimal catalytic performance of Ag1Cu0.025/SBA-15 was ascribed to its high interspersion of Ag nanoparticles, better low-temperature reduction ability, the interaction between Ag and Cu, and its high surface area and large pore volume. This study provides guidance for the regulation of active sites for low-temperature catalytic degradation.