NOVELTY - Hydrogen generating article (I) comprises: at least one siloxene (II); at least one binder polymer; and at least one amino activator.    USE - (I) is useful in: composition and device for generating hydrogen for fuel cell and internal combustion engine. The device is useful in exhaust gas treatment system for an internal combustion engine (all claimed). The device is useful in automobiles or light duty vehicles.    ADVANTAGE - The composition generates hydrogen in a safe and controlled manner. (I) provides higher levels of efficiency, control and safety. (I) increases the volumetric density of the materials, and eliminates the need for space-occupying and energy consuming pumps required to move powders. (I) eliminates the need for a powder cartridge and facilitates the re-fueling process. The method reduces the volume, mass and cost of materials required and also provides the opportunity to improve engine combustion efficiency by lowering the temperature of the exhaust gases returned to the combustion chamber and provides the opportunity for the addition of a small amount of hydrogen which has been shown to be effective in improving combustion and lowering harmful exhaust emissions. The device improves the overall system efficiency and hydrogen yield.    DETAILED DESCRIPTION - Hydrogen generating article (I), comprises: at least one siloxene of formula (Si6H3-6O3-6) (II); at least one binder polymer; and at least one amino activator. INDEPENDENT CLAIMS are included for:    (1) a hydrogen generating gel, comprising a material containing trisilane, tetrasilane, hexasilane, pentasilane, cyclopentasilane, substituted cyclopentasilane, cyclohexasilane, substituted cyclohexasilane, a short chain hydrocarbon with at least one terminal silane groups, disilabutane, disilapropane, phenylsilane, disilylbenzene, trisilylbenzene, hexasilylbenzene or a binder polymer;    (2) a composition for generating hydrogen on an as needed basis in a controlled manner, comprising: the article comprising the siloxene; a quantity of a propylamine or dilute strong base catalyst; and a quantity of water, where the quantity of catalyst is 0.1-5 mass% of the water and the mass ratio of water to siloxene is 1:1-10:1;    (3) a method for the generation of hydrogen comprising mixing the siloxene or a calcium silicide starting material, the condensate from an internal combustion engine, and a catalyst, to generate hydrogen; and    (4) a device for generating the hydrogen, comprising: an exhaust gas cooler for condensing out water vapor; a mixing chamber for mixing the exhaust gas condensate and a catalyst; a mixing chamber for mixing an organosilane, polysilane or a siloxene starting material, the exhaust gas condensate, and a catalyst; a reaction chamber comprising a hydrogen outlet; a hydrogen outlet comprising a hydrogen permeable membrane; and a silicate by-product precipitate collector.