Anionic impregnation was used to depose platinum onto a porous membrane to be used in a gas-liquid contact Catalytic Membrane Reactor. This membrane was a tube made of several layers, with a decreasing pore size in the radial direction to the axis. The top layer was mesoporous (pore diameter approximate to 5 nm), and made of titania, An amount of 5 mn of Pt crystallites were selectively deposited to this porous zone and formed branched-shape particles. Their distribution in the membrane was precisely monitored using electron microscopopy (SEM, TEM and attached analysis methods). The membrane integrity was checked by nitrogen permeation experiments. Other characterisation techniques included XRD (crystallite size) and N-2 adsorption (pore size distribution).