In the study at hand we present a design strategy for novel catalysts which can be used for the selective hydrogenation of alkynes to alkenes. The design of the novel catalysts is based on two main ideas, namely (1) the synthesis of Pd nanoparticles via microemulsions and (2) the use of highly-ordered mesoporous silica with a 3-D pore network (FDU-12) serving as support. The nanoparticles are deposited on FDU-12 in two different ways. Firstly, we simply impregnated the support with a dispersion of the nanoparticles. The resulting catalyst was not selective at all; on the contrary, it fully hydrogenated our model alkyne, namely 3-hexyn-1-ol. Secondly, we synthesized the FDU-12 in the presence of the nanoparticles (in-situ synthesis). In this case, we obtained one catalyst which performed as well as the Lindlar catalyst although the metal content was slightly lower and our catalyst contained no Pb. Another catalyst of the same series, prepared in the presence of another stabilizer, performed as well as the NanoSelect™ catalyst but at a 7 times higher metal content. For the sake of comparison we also impregnated FDU-12 via classical incipient wetness impregnation and again obtained a completely nonselective catalyst. Our results demonstrate that the in-situ synthesis has great potential as regards the development of novel catalysts.

在当前的研究中，我们提出了一种新型催化剂的设计策略，该催化剂可用于将炔烃选择性加氢为烯烃。新型催化剂的设计基于两个主要思想，即（1）通过微乳液合成Pd纳米颗粒，以及（2）使用具有3-D孔网络（FDU-12）的高度有序介孔二氧化硅作为催化剂支持。纳米颗粒以两种不同方式沉积在FDU-12上。首先，我们仅用纳米颗粒的分散液浸渍载体。所得催化剂根本没有选择性。相反，它完全氢化了我们的模型炔烃，即3-hexyn-1-ol。其次，我们在纳米粒子的存在下合成了FDU-12（原位合成）。在这种情况下，我们获得了一种性能与Lindlar催化剂相同的催化剂，尽管金属含量略低，而且我们的催化剂不含Pb。在另一种稳定剂的存在下制备的同一系列的另一种催化剂的性能与NanoSelect™催化剂相同，但金属含量高出7倍。为了进行比较，我们还通过经典的初湿浸渍法浸渍了FDU-12，并再次获得了完全非选择性的催化剂。我们的结果表明，就新型催化剂的开发而言，原位合成具有巨大的潜力。为了进行比较，我们还通过经典的初湿浸渍法浸渍了FDU-12，并再次获得了完全非选择性的催化剂。我们的结果表明，就新型催化剂的开发而言，原位合成具有巨大的潜力。为了进行比较，我们还通过经典的初湿浸渍法浸渍了FDU-12，并再次获得了完全非选择性的催化剂。我们的结果表明，就新型催化剂的开发而言，原位合成具有巨大的潜力。