A series of CoMn catalysts derived from hydrotalcite precursors with different Co/Mn molar ratios were prepared and applied for higher alcohols synthesis (HAS) via syngas. The physical and chemical properties of as-prepared catalysts were investigated by various characterization methods such as BET, XRD, TPR, TG, SEM, HRTEM and EDS. The results showed that the proper Co/Mn molar ratio can increase the specific surface area, improve the reducibility, and form regular layered structure to provide more uniform distribution of active sites, thereby enhancing the catalytic activity and alcohol selectivity. When the Co/Mn ratio of catalyst reached 2, the highest space time yield (STY) and selectivity of alcohol were obtained. Moreover, the CoMn catalyst with layered structure showed higher activity and yield of alcohol under high reaction temperature than that without layered structure. Characterization results indicated that the layered structure catalyst can provide larger surface area, smaller particles size, and stronger interaction between Co and Mn, as well as resist the separation of Co, Mn and prevent the aggregation, thus improving the catalytic performance of CoMn catalysts for higher alcohols synthesis. In addition, the CoMn catalyst obtain derived from hydrotalcite precursors presented great stability for keeping active site highly disperse on the layer during the long reaction time.

制备了一系列具有不同Co / Mn摩尔比的水滑石前驱体衍生的CoMn催化剂，并通过合成气应用于高级醇合成（HAS）。通过各种表征方法，如BET，XRD，TPR，TG，SEM，HRTEM和EDS，研究了所制备催化剂的物理和化学性质。结果表明，适当的Co / Mn摩尔比可以增加比表面积，提高还原性，并形成规则的层状结构以提供活性位点的更均匀分布，从而提高催化活性和醇选择性。当催化剂的Co / Mn比达到2时，获得最高的时空产率（STY）和醇的选择性。而且，在高反应温度下，具有层状结构的CoMn催化剂比没有层状结构的CoMn催化剂具有更高的活性和醇收率。表征结果表明，该层状结构催化剂可以提供较大的表面积，较小的粒径和较强的Co与Mn之间的相互作用，并能抵抗Co，Mn的分离并防止聚集，从而提高了CoMn催化剂对二恶英的催化性能。高级醇的合成。另外，从水滑石前体获得的CoMn催化剂表现出很大的稳定性，以在较长的反应时间内保持活性位点高度分散在该层上。钴和锰之间更强的相互作用，以及阻止钴，锰的分离并防止聚集，从而提高了钴锰催化剂对高级醇合成的催化性能。另外，从水滑石前体获得的CoMn催化剂表现出很大的稳定性，以在较长的反应时间内保持活性位点高度分散在该层上。钴和锰之间更强的相互作用，以及阻止钴，锰的分离并防止聚集，从而提高了钴锰催化剂对高级醇合成的催化性能。另外，从水滑石前体获得的CoMn催化剂表现出很大的稳定性，以在较长的反应时间内保持活性位点高度分散在该层上。