Application of cheap and environmentally friendly ZnO to oxide–zeolite composite catalysts for the syngas-to-aromatics (STA) reaction is still challenging. Here, we report 80.1% aromatics in products excluding CO₂, with 14.8% CO conversion over a mixed composite catalyst containing H-ZSM-5 and nanosized porous ZnO modulated by Mn. As little as 0.6–3.0 wt% of Mn can lead to a dramatic decrease in the particle size of ZnO and an obvious increase in oxygen vacancies. Mn species themselves do not act as the primary catalytic sites. The ability to convert syngas is positively correlated with oxygen vacancy concentration, whereas the ability to hydrogenate olefins is negatively correlated with it. The porous aggregated nanoparticles of ZnO modulated by Mn are resistant to sintering during syngas conversion. This provides a new strategy for STA catalyst design.

在用于合成气-芳烃（STA）反应的氧化物-沸石复合催化剂中应用廉价且环保的ZnO仍然具有挑战性。在这里，我们报告了80.1％的芳烃在不包括CO _2的产品中在含有H-ZSM-5和Mn调节的纳米级多孔ZnO的混合复合催化剂上具有14.8％的CO转化率。少至0.6-3.0 wt％的Mn会导致ZnO的粒径急剧减小，氧空位明显增加。锰物种本身不充当主要的催化位点。合成气的转化能力与空位浓度正相关，而氢化烯烃的能力与空位浓度负相关。Mn调节的ZnO多孔聚集纳米粒子在合成气转化过程中具有抗烧结性。这为STA催化剂设计提供了新的策略。