NOVELTY - An apparatus for hydrogen generation and storage comprises a photoelectrochemical direct hydrogen generator, an electrochemical compressor and a hydrogen gas storage tank. The photoelectrochemical direct hydrogen generator has a water inlet (12) connectable with a water supply, a hydrogen gas outlet (13) and photoelectrochemical cell(s). The photoelectrochemical cell(s) comprises water permeable photoelectrode(s) comprising a light sensitive, nano-crystalline catalytic material layer, a polymer electrolyte membrane, a metallic substrate, and photovoltaic device(s).    USE - Apparatus is used for hydrogen generation and storage for portable power application.    ADVANTAGE - The apparatus for hydrogen generation and storage is economical and efficient.    DETAILED DESCRIPTION - An apparatus for hydrogen generation and storage comprises a photoelectrochemical direct hydrogen generator, an electrochemical compressor and a hydrogen gas storage tank. The photoelectrochemical direct hydrogen generator has a water inlet connectable with a water supply, a hydrogen gas outlet and photoelectrochemical cell(s). The photoelectrochemical cell(s) comprises water permeable photoelectrode(s) comprising a light sensitive, nano-crystalline catalytic material layer, a polymer electrolyte membrane, a metallic substrate disposed between the light sensitive nano-crystalline catalytic material layer and the polymer electrolyte membrane adjacent to a polymer electrolyte membrane layer, and photovoltaic device(s) connected in series to the light sensitive nano-crystalline material layer and disposed between the light sensitive nano-crystalline catalytic material layer and the metallic substrate layer. The electrochemical compressor has a hydrogen gas inlet in fluid communication with the hydrogen gas outlet and a compressed hydrogen gas outlet. The hydrogen gas storage tank has a compressed hydrogen gas inlet in fluid communication with the compressed hydrogen gas outlet. The water permeable photoelectrode is an n-titania photoanode (15). The n-titania photoanode comprises nano-crystalline titania disposed on a metallic titanium substrate. The metallic titanium substrate is chosen from titanium metal foil and titanium gauze. The apparatus further has an additional electrode. The additional electrode is a p-silicon semiconductor disposed on a perforated stainless steel substrate. The additional electrode comprises a carbon paper coated with platinum black. An INDEPENDENT CLAIM is included for apparatus for splitting water to produce hydrogen.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the photoelectrochemical direct water splitting device for hydrogen and oxygen production.    Housing (11)    Water inlet (12)    Hydrogen gas outlet (13)    Oxygen outlet (14)    Photoanode (15)