In this contribution, we reported the liquid single-stage synthesis of isoprene from methyl tert-butyl ether (MTBE) and formaldehyde over activated carbon supported silicotungstic acid (STA/AC) catalysts. In comparison with the corresponding homogeneous STA catalysts, the STA/AC catalysts exhibited much higher activity of the prins condensation reaction under the same conditions. The results could be attributed to the highly dispersed STA, the relative weaker acidity resulting from the strong interaction between STA and AC and the structural collapse of STA. Additionally, the catalyst could be reused at least 3 times with only a slight decrease of activity. The physical and chemical properties of the STA/AC catalysts were characterized by means of DRIFT, HRTEM, HAADF-STEM, NH₃-TPD, XRD, XPS and TG techniques. The excellent catalytic reactivity and easy recycling advantages make the STA/AC catalyst to be an attractive candidate of the prins reactions in the future.

在这项贡献中，我们报告了在活性炭负载的硅钨酸（STA / AC）催化剂上，由甲基叔丁基醚（MTBE）和甲醛进行液态单级合成异戊二烯。与相应的均相STA催化剂相比，STA / AC催化剂在相同条件下显示出更高的prins缩合反应活性。结果可能归因于高度分散的STA，由于STA与AC之间的强相互作用和STA的结构崩溃而导致的相对较弱的酸度。另外，催化剂可以重复使用至少3次，而活性仅略有下降。STA / AC催化剂的物理和化学性质通过DRIFT，HRTEM，HAADF-STEM，NH ₃表征。-TPD，XRD，XPS和TG技术。出色的催化反应性和易于回收利用的优点使STA / AC催化剂成为未来公主反应的诱人候选物。