| 摘要： |
Selective transfer hydrogenation (STH) is an efficient strategy in biomass upgradation, especially for the production of unsaturated alcohols from biomass-derived alpha,beta-unsaturated aldehydes. Design of effective catalysts with excellent stability for the STH is highly desired. Here, we report the synthesis of Ni3Al1-oxide hollow nanospheres (h-Ni3Al1-800) derived from Ni3Al1 layered double hydroxide grafted on hollow polymer spheres (HPS@Ni3Al1-LDH) by calcination at 800 degrees C in air. h-Ni3Al1-800 is an efficient catalyst for the STH of alpha,beta-unsaturated aldehydes with selectivities towards alpha,beta-unsaturated alcohols >99% at almost full conversions. More importantly, h-Ni3Al1-800 can be recycled at least 12 times without loss of activity. Experimental results and DFT calculations prove that the Al dopant in h-Ni3Al1-800 provides much stable Ni delta+-type (2 < delta < 3) acid-base pairs which can efficiently catalyze the STH with improved stability. This work provides a promising direction for the design of STH catalysts that have potential for industrial applications. |
