Highly dispersed Pd nanoparticles supported on nitrogen-doped graphene with enhanced hydrogenation activity
Highly dispersed Pd nanoparticles supported on nitrogen-doped graphene with enhanced hydrogenation activity
复制标题
氮掺杂石墨烯负载高度分散的钯纳米粒子，具有增强的氢化活性
作者：
刘平;李根;常婉亭;武梦瑶;李永昕;王军
以氮掺杂石墨烯（NG）为载体，制备了Pd纳米粒子加氢催化剂。以乙二胺、氨水和尿素为氮源，在温和条件下水热合成NG。采用透射电子显微镜、扫描电子显微镜、拉曼光谱、元素分析、氮吸附-脱附、X射线衍射和X射线光电子能谱等手段对样品进行了表征。当氮被引入石墨烯结构中时，观察到Pd纳米颗粒的显著改善的分散。由于Pd的上级分散性，这些NG负载Pd催化剂表现出更高的催化加氢活性。在不同烯烃的加氢反应中，以尿素为氮源，NG负载的Pd催化剂均获得了较好的转化率。
Pd nanoparticles supported on nitrogen-doped graphene (NG) were prepared as hydrogenation catalysts. Different nitrogen sources (ethylenediamine, ammonia, and urea) were employed to synthesize NG using hydrothermal treatment under mild conditions. The as-made samples were characterized by transmission electron microscopy, scanning electron microscopy, Raman spectroscopy, elemental analysis, nitrogen adsorption–desorption, X-ray diffraction, and X-ray photoelectron spectroscopy. Remarkably improved dispersion of Pd nanoparticles was observed when nitrogen was introduced into the graphene structure. These NG-supported Pd catalysts showed enhanced catalytic hydrogenation activities owing to the superior dispersion of Pd. In the hydrogenation of different olefins, perfect turnover frequencies were obtained over the NG-supported Pd catalyst with urea as the nitrogen source.
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影响因子：
--
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