We have tested the lifetime of catalyst for its practical applications. Thus, the used Pd@MOF can be separated from the reaction solution easily by a simple centrifuge and deal with EtOH. The result showed that the p-anisaldehyde catalytic hydrogenation activity of Pd@MOF is almost maintained after 3 cycles (Figure ). The yield decreased in the subsequent cycle experiment, which was probably due to the loss of catalysts during the recovery process. When we added 2 mg of catalyst, the yield reached the original level in the fourth and fifth runs. In this work, NH2-MIL-125 (Ti)