Different MgAl mixed oxides with a Mg/Al ratio of 2 were obtained through calcination of the corresponding hydrotalcites at 450 °C and tested for MPV reaction of benzaldehyde with 2-butanol. The influence of several synthetic parameters (such as co-precipitation in the presence of Pluronic P123 or homogeneous precipitation in the presence of urea in the medium) on catalytic performance was studied. The use of urea led to a decrease in surface area as compared to conventional precipitation method (125 m²/g and 201 m²/g, respectively) but an increase in surface basicity (7.3 µmol CO₂/m² and 4.3 µmol CO₂/m², respectively). Utilization of Pluronic 123 increases surface area (183 m²/g) though basicity is hardly affected (4.2 µmol CO₂/m²). All the catalysts showed a high conversion and high selective to the desired product, observing a relationship between the density of basic sites and the catalytic activity. All in all, the solid exhibiting the highest benzyl alcohol yield was that synthesized in the presence of urea (labelled as HT-U-450), with a rate of 2.05 mmol benzyl alcohol/gcat × min.

通过在450°C下煅烧相应的水滑石获得Mg / Al比为2的不同MgAl混合氧化物，并测试苯甲醛与2-丁醇的MPV反应。研究了几种合成参数（例如在Pluronic P123存在下的共沉淀或在介质中存在尿素的情况下的均匀沉淀）对催化性能的影响。与传统的沉淀方法（分别为125 m ² / g和201 m ² / g）相比，尿素的使用导致表面积减少，但表面碱度（7.3 µmol CO ₂ / m ²和4.3 µmol CO）增加₂ / m ²）。使用Pluronic 123可增加表面积（183 m² / g），但几乎不影响碱度（4.2μmolCO ₂ / m ²）。所有催化剂显示出对所需产物的高转化率和高选择性，观察到碱性位点的密度与催化活性之间的关系。总而言之，具有最高苄醇收率的固体是在脲存在下（标记为HT-U-450）合成的固体，比率为2.05mmol苄醇/ gcat×min。