TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Component: The gas/liquid separator comprises porous ceramic or fritted glass.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The gaseous fuel is hydrogen. The liquid fuel precursor is an alkaline aqueous sodium borohydride mixture. The liquid waste/byproduct is an aqueous sodium boron oxide mixture. The supporting substrate comprises high surface area alumina. The gas/liquid separator comprises porous silicon matrix. Preferred Composition: The catalytic composition comprises rubidium.    TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Condition: The power is generated at ambient temperature. The generated power is 0.1-100, preferably 10 Watts. Preferred Dimension: The gas/liquid separator comprises apertures with dimensions of up to 1 nm. Preferred Component: The microfluidic assembly comprises a polymeric material. The catalytic support surface comprises laminar flow field, linear flow field, non-linear flow field, curvilinear flow field or convoluted flow field. The device further comprises mechanism for disposing the barrier to seal the membrane having gasket, clamp, press-fit clip, heat-melted seal, vacuum seal, magnetic seal, screw, bolt, nut, rivet, pin, adhesive, solder, aligning element, peripheral skirt, mesh or screen cap. It comprises unitary article of manufacture and an integrated article of manufacture.    TECHNOLOGY FOCUS - METALLURGY - Preferred Component: The gas/liquid separator comprises stainless steel grit.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The gaseous fuel is hydrogen. The liquid fuel precursor is an alkaline aqueous sodium borohydride mixture. The liquid waste/byproduct is an aqueous sodium boron oxide mixture. The supporting substrate comprises high surface area alumina. The gas/liquid separator comprises porous silicon matrix. Preferred Composition: The catalytic composition comprises rubidium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The gaseous compound comprises carbon dioxide, CH3OH, CHOOH, H2CO (sic), hydrogen gas, oxygen gas, water or hydrogen peroxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The fuel cell comprises polymer electrolyte membrane. The gas/liquid separator comprises polymer membrane. The polymer membrane comprises Nation, Teflon, Zitex A or Zitex G.