Zn-Co double metal cyanides (DMCs) were dispersed on silica by dry and liquid-assisted (LAG) grinding to improve the catalytic performance of the DMC phase. The characterization of the resulting materials by transmission electron microscopy, N₂ physisorption, and powder X-ray diffraction indicated that the presence of water during the grinding step, not only helped to preserve the structural and textural properties of the DMC, but also facilitated the dispersion of the active phase onto the silica support. The accessibility of the Lewis acid sites was increased, as evidenced by FTIR spectroscopy with pyridine as probe molecule. The catalytic activity of the DMC phase for both the hydroamination of phenylacetylene with 4-isopropylaniline and the ring opening polymerization of 1,2-epoxyhexane was enhanced upon dispersion on silica due to the greater availability of the active Zn(II) sites. As a result, higher turnover frequencies were obtained upon decreasing the amount of DMC in the sample. The positive effect on the catalytic activity was the most pronounced for the catalysts prepared via LAG.

Zn-Co双金属氰化物（DMC）通过干燥和液体辅助（LAG）研磨分散在二氧化硅上，以改善DMC相的催化性能。通过透射电子显微镜对所得材料进行表征，N ₂物理吸附和粉末X射线衍射表明，在研磨步骤中存在水，不仅有助于保留DMC的结构和织构性质，而且还有助于将活性相分散到二氧化硅载体上。如以吡啶为探针分子的FTIR光谱所证明的，路易斯酸位点的可及性增加了。当分散在二氧化硅上时，由于活性Zn（II）位的可用性更高，DMC相对苯乙炔与4-异丙基苯胺的加氢胺化反应和1,2-环氧己烷的开环聚合反应的催化活性均得到增强。结果，在减少样品中DMC的量时获得了更高的周转频率。