NOVELTY - A hydrogen storage process utilizing a porous solid-state hydrogen storage medium, involves displacing at least one hydrogen atom stored on the storage medium to create at least one dangling bond on the storage medium, while applying a charge to the storage medium; and replacing the hydrogen atom displaced from the storage medium with a placeholder, thereby preventing the dangling bond from bonding to an adjacent dangling bond within the storage medium.    USE - For storing hydrogen useful for power applications including mobile applications such as vehicles; as energy source in applications e.g. cellular phones ans space engine; as a fuel in internal combustion engine and fuel cells; and as motor vehicle hydrogen storage tank.    ADVANTAGE - The process maintains the integrity of the storage medium during hydrogen release from the storage medium by providing placeholders for hydrogen atoms desorbed from the storage medium. By preventing dangling bonds of the storage medium from bonding to adjacent dangling bonds created by hydrogen release from the storage medium, the structural integrity of the storage medium can be maintained, as well as the hydrogen storage capacity of the medium. Application of a charge to the silicon storage matrix causes adjacent silicon structures to repel one another, similar to the mutual repulsion of metal foil leaves of an electroscope. Bond sites and other portions of the matrix from which hydrogen atoms have been released are effectively passivated, preventing silicon dangling bonds in close proximity to each other from forming silicon-silicon bonds, and thus preserving the structure of the matrix material. As a result, the matrix is unchanged after hydrogen desorption and retains its ability to bond with and store hydrogen atoms during a subsequent recharge operation. Manipulation of electrical power applied to the matrix can provide effective control over the rate of hydrogen adsorption-desorption, which is highly beneficial for applications such as a motor vehicle hydrogen storage tanks that require a sufficiently rapid and convenient recharging capability to find consumer acceptance.    DETAILED DESCRIPTION - A hydrogen storage process utilizing a porous solid-state hydrogen storage medium, involves displacing at least one hydrogen atom stored on the storage medium to create at least one dangling bond on the storage medium, while applying a charge to the storage medium; and replacing the hydrogen atom displaced from the storage medium with a placeholder, thereby preventing the dangling bond from bonding to an adjacent dangling bond within the storage medium. The hydrogen storage process further involves recharging the storage medium with hydrogen atom by reversing the charge applied to the storage medium in the presence of free hydrogen atoms to release the placeholder from the dangling bond and draw a free hydrogen atom to the dangling bond from which the placeholder was released. An INDEPENDENT CLAIM is included for an apparatus (30) for carrying out a hydrogen storage process comprising electrodes (36) for applying a charge to the storage medium; displacing system for displacing hydrogen atom stored on the storage medium to create dangling bond on the storage medium; and system for replacing the hydrogen atom displaced from the storage medium with a placeholder, thereby preventing the dangling bond from bonding to an adjacent dangling bond within the storage medium.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the apparatus for carrying out storage of hydrogen.    apparatus (30)    silicon porous matrix (32)    base (34)    electrode (36)    cover (38)    inlet (40)    outlet (42)    light source (44)    heat source. (46)