Different alumina samples prepared with sol–gel, chemical precipitation and hydrothermal synthesis were used as supports of Fe-promoted Rh-based catalysts for ethanol synthesis via CO hydrogenation. The samples were characterized by means of N₂-adsorpotion, XRD, H₂-TPR, XPS, STEM, H₂-TPD, DRIFTS, H₂ and CO chemisorption. The results indicated that the Al₂O₃ prepared by hydrothermal synthesis exhibited nano-fiber morphology and constituted of mixed crystal phases, while Al₂O₃ prepared by sol–gel and chemical precipitation shows no changes of morphology and crystal phases compared with the commercial Al₂O₃. In addition, nano-fiber Al₂O₃-supported Rh-based catalyst shows higher ethanol selectivity, which is ascribed to the lower metal–support interaction, higher dispersion and stronger CO insertion ability.

采用溶胶-凝胶法、化学沉淀法和水热合成法制备的不同氧化铝样品作为Fe助剂Rh基催化剂的载体，用于CO加氢合成乙醇。通过N ₂ -吸附、XRD、H ₂ -TPR、XPS、STEM、H ₂ -TPD、DRIFTS、H ₂和CO化学吸附对样品进行表征。结果表明，水热合成法制备的Al ₂ O ₃呈现纳米纤维形貌，由混合晶相组成，而溶胶-凝胶法和化学沉淀法制备的Al ₂ O ₃与商业化制备的Al 2 O 3 相比，形貌和晶相没有变化。 Al ₂ O ₃。此外，纳米纤维Al ₂ O ₃负载的Rh基催化剂表现出更高的乙醇选择性，这归因于较低的金属-载体相互作用、更高的分散性和更强的CO插入能力。