the impregnation method with others and found that catalysts prepared by the impregnation method can obtain smaller active phase and lower activationenergy [ 13 ]. Moreover, the colloidal and polyol methods are relatively complex and costly, and
are 0.031, 0.070 and 0.125 min −1 . The reaction seems to be pseudo-first order and the activationenergy from the Arrhenius plot based on the obtained k values is found to be 60.49 kJ/mol ( Fig. 10 ).
existence of the barriers at the Pd and Pb ends, i.e., the TS1 and TS3, respectively, excludes spontaneous dissociation of H 2 , while the H 2 dissociation on Pd 2 can proceed without activationenergy [ 65 ]. Furthermore, the Pb atom also has an influence