In this study, the Pt-loaded ellipsoidal nanozeolite (Pt/ZSM-5-OS) was successfully synthesized by the mercaptosilane modification assisted Pt dispersion method and investigated for the catalytic combustion of toluene, which was used as a model compound of volatile organic compounds (VOCs). The catalytic activity evaluation showed that Pt/ZSM-5-OS exhibited an excellent activity in toluene catalytic combustion, with 90% conversion (T₉₀) occurring at just 164 °C. The catalytic activity was much higher than the catalyst prepared by traditional impregnation method (Pt/ZSM-5-IM, T₉₀ = 196 °C). In addition, the excellent properties of anti-water vapor and catalytic stability were observed for Pt/ZEM-5-OS. The as-prepared catalysts were characterized by X-ray diffraction (XRD), N₂ physisorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Characterization of the as-prepared catalysts demonstrated that the enhanced catalytic performance was related to the improved Pt dispersion and higher Pt⁰ proportion of Pt-ZSM-5-OS. Hence, Pt/ZSM-5-OS and its preparation method are attractive for the practical VOCs catalytic combustion.

本研究通过巯基硅烷改性辅助Pt分散法成功合成了负载Pt的椭圆形纳米沸石（Pt / ZSM-5-OS），并研究了其催化燃烧甲苯的作用，该甲苯被用作挥发性有机化合物的模型化合物（VOC）。催化活性评估表明，Pt / ZSM-5-OS在甲苯催化燃烧中表现出出色的活性，仅在164°C时发生90％的转化率（T ₉₀）。催化活性远高于传统浸渍法制备的催化剂（Pt / ZSM-5-IM，T ₉₀  = 196°C）。另外，对于Pt / ZEM-5-OS，观察到了优异的抗水蒸气性能和催化稳定性。制备的催化剂通过X射线衍射（XRD），N₂物理吸附，扫描电子显微镜（SEM），透射电子显微镜（TEM）和X射线光电子能谱（XPS）。所制备催化剂的表征表明，增强的催化性能与改善的Pt分散性和较高的Pt-ZSM-5-OS Pt ⁰比例有关。因此，Pt / ZSM-5-OS及其制备方法对实际的VOCs催化燃烧具有吸引力。