金属有机骨架MIL-110负载Ru-P纳米粒子:一种水解氨硼烷的高效催化剂

Ru-P nanoparticles supported on metal-organic frameworks MIL-110:a highly efficient catalysts for the hydrolysis of ammonia borane

采用Na H2PO2还原法首次将Ru和P负载于高孔隙率的金属有机骨架材料MIL-110(Al)上,得到新颖的金属-非金属双组份负载型催化剂Ru-P@MIL-110.通过一系列表征手段分析该催化剂的结构、粒径分布、元素组成及价态,并在室温下通过催化氨硼烷水解释氢实验研究其催化活性.结果表明,非金属P的加入能显著提高催化活性,Ru-P@MIL-110催化剂对氨硼烷的水解释氢有好的催化活性,其TOF值为8 646 m L H2·min-1(g catalyst)-1,活化能为42.2 k J·mol-1.经5次循环实验后,该催化剂仍保持结构稳定和高的可耐受性.

The supported catalyst Ru-P @ MIL-110（ Al） containing Ru and P nanoparticles were firstly synthesized by Na H2 PO2 reduction of Ru salts into the highly porous and hydrothermally stable metale organic framework MIL-110. And the structure,size,composition and loading metal electronic states of the catalyst were analyzed by a series of characterizations. The catalytic performance was tested in the hydrogen generation from aqueous solution of ammonia borane at room temperature. The results showed that the addition of non-metal P could significantly increase the catalytic activity and the as-synthesized Ru-P@ MIL-110（ Al） catalyst exhibited the highest catalytic activity,with a total turn over frequency value of 8 646 m L H2·min^-1（ g catalyst）-1,and the activation energy was determined to be 42. 2 k J ·mol-1. Moreover,the catalyst exhibited the great durability and structural stability after five cycles for the hydrolytic dehydrogenation of ammonia borane.