采用ＸＲＤ，ＬＲＳ技术研究了不同Ｒｈ含量的ＲｈＭｏＫ／Ａｌ２Ｏ３催化剂的结构，并与其合成低碳混合醇性能相关联．结果表明，在氧化态ＭｏＫ／Ａｌ２Ｏ３催化剂体系中添加０２％的Ｒｈ会导致表面“ＫＭｏ”物种聚集，继续增加Ｒｈ含量，铑可能和钾钼物种结合生成一种新的表面活性物相，从而使“ＫＭｏ”物相晶粒变小，分散度提高．在硫化态催化剂中，Ｒｈ的添加不仅能提高ＣＯ加氢合成醇的收率和选择性，而且有利于改善产物的分布．基于以上结果，认为“ＫＭｏ”作用物种和Ｒｈ物种均为合成醇的催化活性组分，它们间的相互协同作用使催化剂性能得到显著改善． The structures of RhMoK / Al2O3 catalysts with different Rh contents were studied by XRD and LRS techniques, which were correlated with the properties of lowcarbon mixed alcohols. The results showed that the addition of 02% Rh to the oxidized MoK / Al2O3 catalyst system resulted in the aggregation of “KMo” species on the surface and continued to increase the Rh content. Rhodium may be combined with the KMO species to form a new surface Active phase, so that the “K  Mo” phase grain smaller, higher dispersion. In the sulfurized catalyst, the addition of Rh can not only improve the yield and selectivity of CO hydrogenation of alcohols, but also help to improve the product distribution. Based on the above results, it is considered that both the “K-Mo” acting species and the Rh species are the catalytically active components of the synthetic alcohol, and the synergistic effect among them can significantly improve the catalyst performance.