【摘要】 采用一步溶剂蒸发诱导自组装法制备了不同CuO含量的Cu-SiO₂催化剂,考察了CuO含量和反应温度对其催化环己醇脱氢制环己酮性能的影响,探讨了催化剂失活原因。结果表明,反应温度为300℃时,CuO质量分数为10%的Cu-SiO₂催化剂表现出较高的活性（环己醇的初始转化率达90%以上）和目标产物选择性（99%以上）。稳定性和再生实验结果表明,金属Cu颗粒的烧结是Cu-SiO₂催化剂失活的主要原因。更多还原

【Abstract】 A series of Cu-SiO₂samples with different contents of CuO was synthesized via the onepot evaporation induced self-assembly method,and was evaluated as a catalyst for the gas-phase dehydrogenation of cyclohexanol to cyclohexanone.The catalysts were characterized by XRD,TG-DSC,TEM,and N₂adsorption-desorption at low temperatures.At the reaction temperature of 300℃,the Cu-SiO₂catalyst containing 10%CuO showed the best performance among the investigated samples,i.e.,the initial conversion of cyclohexanol was over 90%and the selectivity of cyclohexanone was over 99%.From the results of the long-term reaction（50h）and the regeneration of the used catalyst,the sintering of the metallic Cu particles was revealed to be responsible for the catalyst deactivation.These findings are important for the further development of a high-performance Cu-based catalyst for the titled reaction.更多还原