A catalyst for the production of synthesis gas or hydrogen from aqueous methanol by dissociation or steam reforming. The catalyst contains:(A) a metal component of one or more elements of the VIIIb group of the periodic table on a carrier material on the basis:(B.sub.1) of TiO.sub.2 or CeO.sub.2, singly or in admixture with other heat-resistant metal oxides and/or binders or(B.sub.2) of TiO.sub.2, which is introduced onto the surface of a preformed, heat-resistant carrier.Processes utilizing this catalyst allow for the dissociation of methanol for production of synthesis gas, or for the production of hydrogen through steam reforming.Thus, the concentration of hydrogen or of carbon monoxide may be controlled by monitoring the concentration of steam utilized in the inlet feed.