NOVELTY - Generating hydrogen in a water split reaction includes flowing water through an inlet into a container; controllably raising the level of water in the container upwardly to sequentially activate each of the cells as the cells are successively immersed in the water, where the reactant compound in each of the cells produces hydrogen gas upon contact with the water; and flowing the hydrogen gas collected inside the container to the product hydrogen outlet for delivery to the consumer.    USE - Method for generating hydrogen in a water split reaction, used in the Haber process for making ammonia, and for other industrial processes, such as the reduction of oxide ores, the refining of petroleum, the production of hydrocarbons from coal, or the hydrogenation of vegetable oils (claimed).    ADVANTAGE - The method is efficient, and has low cost for generating hydrogen.    DETAILED DESCRIPTION - Generating hydrogen in a water split reaction comprises:    (A) providing a pressure container having a water inlet for fluidly coupling the container to a water source and a product hydrogen outlet for fluidly coupling the container to a hydrogen consumer, where the container comprises cells vertically stacked inside the container each containing a reactant compound comprising a mechanical mixture of a reactant metal and an anti-passivation material;    (B) flowing water through the inlet into the container;    (C) controllably raising the level of water in the container upwardly to sequentially activate each of the cells as the cells are successively immersed in the water, where the reactant compound in each of the cells produces hydrogen gas upon contact with the water; and    (D) flowing the hydrogen gas collected inside the container to the product hydrogen outlet for delivery to the consumer.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a hydrogen generator system.    Hydrogen generator system (100)    Reactor (110)    Discharge manifold (140)    Discharge port (144)    Hydrogen buffer (150)