Modification of supported transition metals catalysts by adding tetra n-butyltin

in this work, supported transition metals catalysts modified by tetra n-but yltin in the presence of hydrogen are studied. It is demonstrated that this methodology derived from the Surface Organometallic Chemistry on Metals, a llows to control the nature of the active phase specifically formed This ac tive phase is dependent of the temperature at which it is activated in hydr ogen: below 423 K, organobimetallic supported phases can be obtained, havin g a good selectivity to cinnamyl alcohol in the hydrogenation of cinnamalde hyde. For higher activation temperatures (773 Ki, the organic fragments are totally eliminated obtaining bimetallic systems with particular properties in the isobutane dehydrogenation to isobutene and in the CO2 reforming of methane to synthesis gas.