Durap Feyyaz, Caliskan Salim, Özkar Saim, Karakas Kadir, Zahmakiran Mehmet
Department of Chemistry, Dicle University, Diyarbakir 21280, Turkey.
Department of Chemistry, Middle East Technical University, Ankara 06800, Turkey.
Materials (Basel). 2015 Jul 10;8(7):4226-4238. doi: 10.3390/ma8074226.
Intensive efforts have been devoted to the development of new materials for safe and efficient hydrogen storage. Among them, ammonia-borane appears to be a promising candidate due to its high gravimetric hydrogen storage capacity. Ammonia-borane can release hydrogen on hydrolysis in aqueous solution under mild conditions in the presence of a suitable catalyst. Herein, we report the synthesis of ruthenium(0) nanoparticles stabilized by dihydrogenphosphate anions with an average particle size of 2.9 ± 0.9 nm acting as a water-dispersible nanocatalyst in the hydrolysis of ammonia-borane. They provide an turnover frequency (TOF) value of 80 min in hydrogen generation from the hydrolysis of ammonia-borane at room temperature. Moreover, the high stability of these ruthenium(0) nanoparticles makes them long-lived and reusable nanocatalysts for the hydrolysis of ammonia-borane. They provide 56,800 total turnovers and retain ~80% of their initial activity even at the fifth catalytic run in the hydrolysis of ammonia-borane at room temperature.
人们已投入大量精力研发用于安全高效储氢的新材料。其中，氨硼烷因其高重量储氢容量似乎是一个有前景的候选材料。氨硼烷在合适催化剂存在下，于温和条件下在水溶液中水解时可释放氢气。在此，我们报道了由磷酸二氢根阴离子稳定的钌（0）纳米颗粒的合成，其平均粒径为2.9±0.9纳米，在氨硼烷水解中作为水分散性纳米催化剂。它们在室温下氨硼烷水解制氢中提供的周转频率（TOF）值为80 min⁻¹。此外，这些钌（0）纳米颗粒的高稳定性使其成为氨硼烷水解的长寿命且可重复使用的纳米催化剂。它们提供56,800次总周转数，即使在室温下氨硼烷水解的第五次催化运行中仍保留其初始活性的约80%。
