The development of highly stable propane dehydrogenation catalyst is significant with the growing extraction of shale gas in the world. A highly dispersed MnO_x site decorated dendritic mesoporous silica nanoparticle support was prepared by simple in-situ emulsion method. It shows exceptionally ability to disperse and stabilize Pt clusters. The strong interaction between Pt and Mn formed and the electron transfer happened from Mn to Pt, which leads to an increase in the electron density of Pt. The high propane dehydrogenation activity, even for 100 h long-term test, was obtained on moderate Mn content catalyst. According to the experimental results and DFT calculation, the highly dispersed PtMn alloyed nanoparticles play an important role in enhancing the catalytic performance for propane dehydrogenation via a good balance on propane activation and propene desorption.

随着世界上页岩气提取量的增加，开发高度稳定的丙烷脱氢催化剂具有重要意义。高度分散的MnO _x通过简单的原位乳液法制备了现场装饰的树枝状介孔二氧化硅纳米颗粒载体。它显示出出色的分散和稳定Pt团簇的能力。Pt和Mn之间形成强相互作用，并且电子从Mn转移到Pt，从而导致Pt的电子密度增加。在中等锰含量的催化剂上，即使进行100小时的长期测试，丙烷的脱氢活性仍然很高。根据实验结果和DFT计算，高度分散的PtMn合金纳米颗粒通过在丙烷活化和丙烯脱附之间取得良好的平衡，在增强丙烷脱氢的催化性能方面起着重要作用。