Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore.
Phys Chem Chem Phys. 2011 Mar 7;13(9):3758-63. doi: 10.1039/c0cp01276a. Epub 2010 Dec 21.
Ruthenium (Ru) nanoparticles dispersed in mesoporous carbon microfibers were prepared using alumina microfibers as the templates via a chemical vapour deposition (CVD) route. Characterized data showed that Ru nanoparticles were embedded in the mesoporous carbon matrix. The samples were found to possess a specific surface area as high as 750 m(2) g(-1), pore sizes in the range of 3-5 nm, lengths in the range of 5-10 μm, and a width of about 0.5 μm. The Ru catalysts displayed a remarkably high catalytic activity and an excellent stability in the hydrogenation of D-glucose. The observed good catalyst performance is attributed to the carbon microfiber morphology, unblocked mesoporous structure, and the hydrogen spillover effect induced by the unique surface contact between the Ru nanoparticles and the carbon. In addition, the incorporation of nitrogen significantly improved the catalytic performance due to the enhanced hydrogen adsorption, better wettability, and modified electronic properties of the Ru.
采用氧化铝微纤维作为模板，通过化学气相沉积（CVD）路线制备了分散在介孔碳微纤维中的钌（Ru）纳米粒子。表征数据表明，Ru 纳米粒子嵌入在介孔碳基体中。发现这些样品具有高达 750 m(2) g(-1)的比表面积、3-5nm 的孔径、5-10μm 的长度和 0.5μm 左右的宽度。Ru 催化剂在 D-葡萄糖的加氢反应中表现出极高的催化活性和优异的稳定性。观察到的良好的催化剂性能归因于 Ru 纳米粒子与碳之间独特的表面接触引起的碳微纤维形态、无阻塞的介孔结构和氢溢出效应。此外，氮的掺入由于增强的氢吸附、更好的润湿性和 Ru 的电子性质的修饰，显著提高了催化性能。
