On the characteristics and hydrogen adsorption properties of a Pd/γ-Al2O3 prepared by sol–gel method

Alumina modified palladium prepared by the sol–gel method was characterized by nitrogen adsorption, transmission electron (TEM), thermal gravimetric (TGA) and X-ray diffraction (XRD). Gamma alumina (γ-Al2O3) modified palladium exhibited ink bottle shape mesopore characteristics with pore diameter of 15 nm. Pd particles with diameter ranging from 5 to 15 nm were well dispersed in the porous alumina matrix. The particles were well crystallized at temperature of 700 °C. TGA results show that Pd precursors decomposed at temperature between 300 and 400 °C, while copolymer was not completely removed until 500 °C. Adsorption of H2 on coated Pd/γ-Al2O3 zeolite beads was improved substantially with time at temperature of 300 °C.