Porous carriers play an important role in the catalytic transformation of syngas into higher alcohols, which promises higher sustainability in C1 chemistry. In this work, a series of hierarchical hollow silica spheres (HHSS) supported Cu-Fe bimetal catalysts were successfully prepared through ultrasonic-assisted impregnation for higher alcohols synthesis from syngas. Structural characterization results indicate that the hierarchical hollow structure of HHSS support can be maintained and the Cu-Fe bimetallic nanoparticles are highly dispersed on HHSS surface. The catalytic performances of samples in the test of CO hydrogenation for higher alcohols synthesis were investigated. The results revealed that the conversion rate of CO and the selectivity of C₂₊OH alcohol increased first and then decreased with the decrease of the amount of Cu content in the Cu_xFe_y@HHSS catalyst. The highest CO conversion, alcohol selectivity and STY_ROH over Cu-Fe@HHSS catalyst are 65.1 %, 46.6 %, and 118.1 gkg⁻¹ h⁻¹, respectively. It was found that a large number of CuFe₂O₄ were formed in Cu-Fe@HHSS catalyst and also confirmed that the CuFe₂O₄ spinel and CuO-CuFe₂O₄ were converted to Cu-Fe₅C₂ composite in the spent Cu-Fe@HHSS catalyst, which can enhance the synergy between Cu-Fe bimetals. Furthermore, copper and iron are highly dispersed on HHSS after the reaction, which enhances the structural stability of the catalyst. Based on the development and utilization of low-cost catalysts and the production of clean liquid fuels, HHSS has a great prospect of catalyst support in the energy field.

多孔载体在合成气催化转化为高级醇方面起着重要作用，这有望提高C1化学的可持续性。在这项工作中，通过超声辅助浸渍成功地制备了由合成气合成高级醇的一系列分级空心二氧化硅球（HHSS）负载的Cu-Fe双金属催化剂。结构表征结果表明，可以保持HHSS载体的分层空心结构，并且Cu-Fe双金属纳米粒子高度分散在HHSS表面。研究了样品在CO加氢测试中催化高级醇合成的催化性能。结果表明，CO的转化率和C ₂₊的选择性随着Cu _x Fe _y @HHSS催化剂中Cu含量的减少，OH醇先增加然后减少。与Cu-Fe @ HHSS催化剂相比，最高的CO转化率，醇选择性和STY _ROH分别为65.1％，46.6％和118.1 gkg ^-1 h ^-1。发现在Cu-Fe @ HHSS催化剂中形成了大量的CuFe ₂ O ₄，并且还证实了CuFe ₂ O ₄尖晶石和CuO-CuFe ₂ O ₄转化为Cu-Fe ₅ C _2。废Cu-Fe @ HHSS催化剂中的复合材料，可以增强Cu-Fe双金属之间的协同作用。此外，反应后，铜和铁高度分散在HHSS上，这增强了催化剂的结构稳定性。基于低成本催化剂的开发和利用以及清洁液体燃料的生产，HHSS在能源领域具有广阔的催化剂支持前景。