Ju Hong-Bin, Zhang Li-Zhi, Li De-Bao, Geng Tao, Jiang Ya-Jie, Wang Ya-Kui
Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 Shanxi China
China Research Institute of Daily Chemistry Co., Ltd Taiyuan 030001 Shanxi China
RSC Adv. 2024 Apr 22;14(18):12853-12863. doi: 10.1039/d4ra01399a. eCollection 2024 Apr 16.
In this study, two types of catalysts were prepared by the combination of gemini quaternary ammonium salt with two distinct species of phosphotungstic acid. Catalysts prepared by the Wells-Dawson type of phosphotungstic acid and Keggin-type phosphotungstic acid both exhibited dual-phase catalytic behavior, demonstrating both heterogeneous and homogeneous catalytic activities. In comparison to the catalyst prepared by the Keggin-type phosphotungstic acid, due to the higher size of Wells-Dawson type of phosphotungstic acid, hydrogen bonding could not effectively affect the catalyst prepared by HPWO. Subsequently, the influential factors on the catalytic reaction were investigated. Through the utilization of techniques such as XPS, FT-IR, Raman spectra and other characterization methods, two distinct structure and reaction mechanisms for these catalysts were elucidated under the influence of hydrogen bonding.
在本研究中，通过将双子季铵盐与两种不同种类的磷钨酸相结合制备了两种类型的催化剂。由韦尔斯-道森型磷钨酸和凯吉恩型磷钨酸制备的催化剂均表现出双相催化行为，兼具多相和均相催化活性。与由凯吉恩型磷钨酸制备的催化剂相比，由于韦尔斯-道森型磷钨酸尺寸较大，氢键无法有效地影响由HPWO制备的催化剂。随后，研究了催化反应的影响因素。通过利用XPS、FT-IR、拉曼光谱等技术及其他表征方法，在氢键影响下阐明了这些催化剂的两种不同结构和反应机理。
