NOVELTY - A hydrogen generation apparatus in which a hydride is decomposed by a catalyst to produce hydrogen and waste products, comprises a store of solid hydride material; dissolution mechanism to dissolve solid hydride; delivery mechanism to deliver hydride solution to a catalyst for evolution of hydrogen and production of waste solution; and waste recovery mechanism to remove waste products.    USE - For a polymer electrolyte fuel cell that generates electric power by consuming hydrogen as fuel and oxygen from air as an oxidant.    ADVANTAGE - The inventive hydrogen generation apparatus delivers waste products to storage for waste products that can then be emptied or removed as appropriate.    DETAILED DESCRIPTION - A hydrogen generation apparatus in which a hydride is decomposed by a catalyst to produce hydrogen and waste products, comprises a store of solid hydride material (1); dissolution mechanism to dissolve at least part of the solid hydride to produce a hydride solution; delivery mechanism to deliver the hydride solution to a catalyst for evolution of hydrogen from the solution and production of a waste solution; and waste recovery mechanism to remove waste products from contact with the catalyst.    INDEPENDENT CLAIMS are also included for:    (a) a fuel cell system, comprising a fuel cell (7) and a hydrogen generation apparatus as above, in which waste water from the fuel cell is recovered to supply water for the hydrogen generation apparatus and hydrogen from the hydrogen generation apparatus supplies fuel for the fuel cell;    (b) a method of generating a hydride for use in hydrogen generation apparatus as above, comprising contacting aluminum, a chemically active medium, and a waste product from oxidation of a complex metal hydride under a hydrogen atmosphere;    (c) a method of supplying hydrogen, comprising supplying a hydride to hydrogen generation apparatus as above, recovering waste product from the hydrogen generation apparatus, and regenerating the hydride using the method as above; and    (d) a cartridge adapted for use in a hydrogen generation apparatus.    DESCRIPTION OF DRAWING(S) - The figure shows a fuel cell and associated hydrogen generating apparatus.    Store of solid hydride material (1)    Diluter (2)    Heat exchanger (3)    Reactor (4)    Electric heater (5)    Waste storage cartridge (6)    Fuel cell (7)    Water storage tank (8)    Condenser (9)    Steam generator (11)