Synthesis of Ru-B amorphous alloy supported on SBA-15 with excellent catalytic efficiency in maltose hydrogenation

Mesoporous silica (SBA-15)-supported Ru-B catalyst was synthesized by ultrasound-assisted incipient wetness infiltration of (NH4)2RuCl6 into SBA-15 and a subsequent reduction with BH4−. It was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, differential scanning calorimetry, and transmission electron microscopy. The resulting Ru-B-X/SBA-15 catalyst was identified to be an amorphous alloy highly dispersing within the pore channels of SBA-15. During liquid-phase maltose hydrogenation, the as-synthesized Ru-B-X/SBA-15 catalyst was more active than the Ru-B-C/SBA-15 obtained via the same process but using RuCl3 as the metal source. The as-prepared Ru-B-X/SBA-15 delivered catalytic activity up to seven times greater than that associated with the reference unsupported Ru-B-C catalyst prepared through the reduction of RuCl3 with BH4, and could be used repetitively 11 times without significant deactivation.

摘要以介孔氧化硅(SBA-15)为载体, 采用超声辅助(NH4)2RuCl6浸渍和BH4−还原法制备了负载型Ru-B催化剂, 并通过X射线衍射、X光电子能谱、差示扫描量热法和透射电子显微等技术表征了该催化剂. 结果表明, 所制得的Ru-B-X/SBA-15催化剂具有非晶态合金结构, 且Ru-B颗粒高分散在SBA-15的孔道中. 在液相麦芽糖加氢反应中, 与采用RuCl3为金属源制得的Ru-B-C/SBA-15相比, Ru-B-X/SBA-15催化剂具有更高的活性, 是非负载型Ru-B-C催化剂的7倍以上, 且能重复套用11次而未发生显著的失活.

Graphical AbstractHighly dispersed and stable Ru-B amorphous alloy was prepared by using (NH4)2RuCl6 as ruthenium sources, which was a potential alternative to the traditional Raney Ni catalyst in maltitol production process.Figure optionsDownload as PowerPoint slide