Department of Chemistry, Academia Sinica, 1 Roosevelt Road Section 4, Taipei 106, Taiwan.
Nanoscale Res Lett. 2013 Oct 8;8(1):414. doi: 10.1186/1556-276X-8-414.
The microwave-assisted nanocomposite synthesis of metal nanoparticles on graphene or graphite oxide was introduced in this research. With microwave assistance, the Pt nanoparticles on graphene/graphite oxide were successfully produced in the ionic liquid of 2-hydroxyethanaminium formate [HOCH2CH2NH3][HCO2]. On graphene/graphite oxide, the sizes of Pt nanoparticles were about 5 to 30 nm from transmitted electron microscopy (TEM) results. The crystalline Pt structures were examined by X-ray diffraction (XRD). Since hydrogenation of styrene is one of the important well-known chemical reactions, herein, we demonstrated then the catalytic hydrogenation capability of the Pt nanoparticles on graphene/graphite oxide for the nanocomposite to compare with that of the commercial catalysts (Pt/C and Pd/C, 10 wt.% metal catalysts on activated carbon from Strem chemicals, Inc.). The conversions with the Pt nanoparticles on graphene are >99% from styrene to ethyl benzene at 100°C and under 140 psi H2 atmosphere. However, ethyl cyclohexane could be found as a side product at 100°C and under 1,520 psi H2 atmosphere utilizing the same nanocomposite catalyst.
本研究介绍了在微波辅助下，在离子液体 2-羟乙基甲铵甲酸酯[HOCH2CH2NH3][HCO2]中，在石墨烯/氧化石墨上合成金属纳米粒子的微波辅助纳米复合材料。通过透射电子显微镜（TEM）结果可知，石墨烯/氧化石墨上的 Pt 纳米粒子的尺寸约为 5 至 30nm。通过 X 射线衍射（XRD）对 Pt 纳米粒子的晶体结构进行了检测。由于苯乙烯的加氢是众所周知的重要化学反应之一，因此，我们在此展示了石墨烯/氧化石墨上的 Pt 纳米粒子的催化加氢能力，以与商业催化剂（Pt/C 和 Pd/C，即来自 Strem 化学公司的活性炭上负载 10wt%金属催化剂）进行比较。在 100°C 和 140psi H2 气氛下，Pt 纳米粒子对苯乙烯的转化率大于 99%，生成乙苯。然而，在相同的纳米复合材料催化剂下，在 100°C 和 1520psi H2 气氛下，会发现乙基环己烷作为副产物。
