HRF5015, a perfluorosulfonic acid resin catalyst with unique pore structures, was investigated in the catalytic self-condensation of cyclohexanone under mild conditions. The morphology of HRF5015 was characterized by transmission electron microscopy (TEM) and atomic force microscope (AFM), and the reaction mechanism was studied by in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). The effects of reaction time and temperature on the yield of dimer were investigated under the nitrogen atmosphere. The results show that the reaction temperature is low, and especially, the selectivity of the dimer is close to 100%. The apparent activation energy for the dimer formation reaction is 54 kJ mol⁻¹. Synergistic action of cluster structure formed by sulfonic groups and nanopores in HRF5015 may be the key factor of high-efficiency catalytic activity and high selectivity. In situ infrared spectra indicate that the intermediate is stable in the reaction process. HRF5015 is environmentally friendly and re-usable, which shows good potential in a future application.

HRF5015是具有独特孔结构的全氟磺酸树脂催化剂，已在温和条件下研究环己酮的催化自缩合反应。用透射电子显微镜（TEM）和原子力显微镜（AFM）表征了HRF5015的形貌，并用原位漫反射红外傅里叶变换光谱（DRIFTS）研究了反应机理。在氮气气氛下研究了反应时间和温度对二聚体产率的影响。结果表明，反应温度低，特别是二聚体的选择性接近100％。二聚体形成反应的表观活化能为54 kJ mol ^-1。HRF5015中由磺酸基和纳米孔形成的簇结构的协同作用可能是高效催化活性和高选择性的关键因素。原位红外光谱表明该中间体在反应过程中是稳定的。HRF5015环保且可重复使用，在未来的应用中显示出良好的潜力。