The Effect of Pd Precursors on the Catalytic Activity of a Pd/Al_2O_3 Catalyst for Cumene Hydroperoxide Hydrogenation

摘要

A^Pd/Al_2O_3 catalysts were prepared by wet impregnation using K_2PdCl_4, (NH_4)PdCl_4, and Pd(NO_3)_2 as precursors. All catalysts were characterized by means of inductively coupled plasma-atomic emission spectroscopy (ICP-AES), temperature-programmed reduction (TPR), X-ray diffraction (XRD), and CO chemisorption. The results obtained in the hydrogenation of cumene hydroperoxide (CUP) to vation extent, whereas Pd/Al_2O_3 catalyst preparedfrom (NH_4)_2 PdCl_4 displayed the lowest TOF value but the best stability.