论文标题
在树突状纤维纳米硅硅氧硅氧甲硅甲氧硅甲氧烷上支撑的硝酸硼和氧化物，用于丙烷的催化氧化脱氢作用
Boron Nitride and Oxide Supported on Dendritic Fibrous Nanosilica for Catalytic Oxidative Dehydrogenation of Propane
论文作者
论文摘要
在这项工作中，我们能够通过设计和合成在树突状纤维纤维纳米（DFN）上设计和合成氮化硼（BN）来显着增加用于丙烷氧化脱氢（ODH）的活性。 DFN/BN显示出明显提高的催化效率，并伴随着特殊的稳定性和选择性。纹理表征与固态NMR和X射线光电子光谱分析表明，DFNS的独特纤维形态和与硅胶相关的各种硼位点的结合是催化性能增加的原因。值得注意的是，dfns/b $ {} _ 2 $ o $ {} _ 3 $也显示出催化活动，尽管与DFNS/bn相比，选择性更中等。固态NMR光谱表明，DFN/bn的较高选择性可能源于附着在B原子上的大量氢键键合的羟基。这项研究表明，氮化硼和氧化物都是活性催化剂，并且通过使用高表面积支撑（DFN），从丙烷到丙烯以及烯烃的生产力显着提高。
In this work, we were able to significantly increase the activity of boron nitride catalysts used for the oxidative dehydrogenation (ODH) of propane by designing and synthesising boron nitride (BN) supported on dendritic fibrous nanosilica (DFNS). DFNS/BN showed a markedly increased catalytic efficiency, accompanied by exceptional stability and selectivity. Textural characterisation together with solid-state NMR and X-ray photoelectron spectroscopic analyses indicate the presence of a combination of unique fibrous morphology of DFNS and various boron sites connected to silica to be the reason for this increase in the catalytic performance. Notably, DFNS/B${}_2$O${}_3$ also showed catalytic activity, although with more moderate selectivity compared to that of DFNS/BN. Solid-state NMR spectra indicates that the higher selectivity of DFNS/BN might stem from a larger amount of hydrogen-bonded hydroxyl groups attached to B atoms. This study indicates that both boron nitride and oxide are active catalysts and by using high surface area support (DFNS), conversion from propane to propene as well as productivity of olefins was significantly increased.
