Although hydrogen is the preferred fuel for electrochemical operations, production of the gas presents some difficulties. The most economic route, by reforming natural gas, is best carried out on an industrial scale much larger than that required for fuel cell application. Hydrogen production by partial oxidation also has the disadvantage of large size and requires pure oxygen. Distribution of part of the production of either process presents real problems in fuel economy. The generation of hydrogen from liquid fuels may be more appropriate for fuel cells, with methanol reforming offering a convenient basis of operation. Reforming can be carried out at relatively low temperatures, and minimization of carbon monoxide – which tends to deactivate fuel cell catalysts – can be easily carried out. Membrane reactors, which favorably displace the reforming equilibria, offer much promise for the future.