Mixed metal oxide (MMO)-supported MoS₂ catalysts with tunable size and morphology of active phases for higher alcohol synthesis (HAS) were prepared by using encapsulated Mo-based precursors with cetyltrimethylammonium bromide (CTAB). The Ni–KMoS/MMO catalysts show enhanced activity and superior selectivity towards higher alcohols to those prepared by the multiple impregnation method and co-impregnation method. That is, the K,Ni–30Mo/MMO catalyst exhibits a high space time yield (STY) of 253 mg per g catalyst per h for C₂₊ alcohols, which is about 3.2 and 1.51 times higher than those of IM-K,Ni–30Mo/MMO and co-IM-K,Ni–30Mo/MMO. The compromise between the dispersion and stacking of supported MoS₂ slabs via adjusting the metal–support interaction is crucial to providing abundant Mo edges for dispersing Ni species to achieve more accessible active sites. The remarkable increase in the number of highly dispersed and contacted NiS_x and Ni–KMoS_x dual active sites will provide highly effective synergism, and thus gives this catalyst enhanced activity and exceptional selectivity towards higher alcohols in CO hydrogenation.

中文翻译：

---

调节负载的K促进的NiMo催化剂中的金属-载体相互作用，以提高在CO加氢中对高级醇的选择性和生产率

混合金属氧化物（MMO）负载的MoS ₂催化剂的大小和活性相的形态可调节，可用于高级醇合成（HAS），方法是使用带有十六烷基三甲基溴化铵（CTAB）的Mo基前驱体。与通过多次浸渍法和共浸渍法制备的那些催化剂相比，Ni-KMoS / MMO催化剂显示出更高的活性和对高级醇的优异选择性。也就是说，对于C ₂₊醇，K，Ni-30Mo / MMO催化剂的高时空产率（STY）为253 mg / g催化剂/小时，比IM-K的高约3.2倍和1.51倍， Ni–30Mo / MMO和共IM-K，Ni–30Mo / MMO。通过MoS ₂支撑板的分散和堆叠之间的折衷调整金属与载体之间的相互作用对于提供丰富的Mo边缘以分散Ni物种以实现更易接近的活性位点至关重要。高度分散和接触的NiS _x和Ni-KMoS _x双活性位的数量显着增加将提供高效的协同作用，因此使该催化剂具有更高的活性，并在CO加氢中对高级醇具有出色的选择性。