A device includes a container having a top plate containing an array of oxygen limiting pinholes and a chamber to hold a chemical hydride fuel, a fuel cell proton exchange membrane electrode assembly supported within the container between the top plate and the chamber, a first gas diffusion layer supported between the fuel cell proton exchange membrane electrode assembly and the top plate, and a second gas diffusion layer supported between the fuel cell proton exchange membrane electrode assembly and the chamber.

A modular device for generating hydrogen gas from a hydrogen liquid carrier may include a housing; an inlet for receiving the hydrogen liquid carrier; and at least one cartridge arranged within the housing. The cartridge may include at least one catalyst configured to cause a release of hydrogen gas when exposed to the hydrogen liquid carrier. The modular device may include a gas outlet for expelling the hydrogen gas released in the modular device and a liquid outlet for expelling spent hydrogen liquid carrier.

The present invention discloses a method for directly synthesizing sodium borohydride by solid-state ball milling at room temperature, which comprises: performing solid-state ball milling on a mixture of a reducing agent and a reduced material by using a ball mill under room temperature, and performing purification to obtain sodium borohydride. The reducing agent comprises one or more of magnesium, magnesium hydride, aluminum, calcium, and magnesium silicide. The reduced material is sodium metaborate containing crystallization water or sodium metaborate, or is a mixture of sodium metaborate containing crystallization water and sodium metaborate. The solid-state milling is performed in a mixed atmosphere of argon and hydrogen, or an argon atmosphere, or a hydrogen atmosphere. The present invention has a simple process, a controllable and adjustable reaction procedure, mild reaction conditions, low energy consumption, low costs, high yield, no pollution, good safety, and easy industrial production.

A dihydrogen generator (5) comprising a chamber (10), a reservoir (260) for containing a reagent and a catalytic system (15), the chamber being impervious to dihydrogen and defining an internal chamber space (45), the reservoir being housed in the internal chamber space and comprising a reservoir wall (270, 275) impervious to a liquid and permeable to dihydrogen, the catalytic system being disposed at least partly in the reservoir and comprising a catalyst (205) for the reaction that generates dihydrogen from the reagent, the chamber comprising a discharge valve (300) for withdrawing the dihydrogen from the internal chamber space, an injection valve (295) for injecting the liquid into the reservoir and a drain valve (460) for draining the liquid from the reservoir.

A system is capable to safely generate a continuous controlled hydrogen flow. The passive auto sufficient hydrogen system is very valuable for example for emergency power back up, propulsion application, battery charging or powering portable devices. Also, a chemical process generates hydrogen using alkali metals, alkaline earth metals, hydrides of alkali metals or hydrides of alkaline earth metals to obtain primary by products from water. Then, the primary byproducts react with a metal reactant to obtain additional hydrogen.

A device includes a container having a top plate containing an array of oxygen limiting pinholes and a chamber to hold a chemical hydride fuel, a fuel cell proton exchange membrane electrode assembly supported within the container between the top plate and the chamber, a first gas diffusion layer supported between the fuel cell proton exchange membrane electrode assembly and the top plate, and a second gas diffusion layer supported between the fuel cell proton exchange membrane electrode assembly and the chamber.

Methods and devices for generating power using PEM fuel cell power systems comprising a rotary bed reactor for hydrogen generation are disclosed. Hydrogen is generated by the hydrolysis of fuels such as lithium aluminum hydride and mixtures thereof. Water required for hydrolysis may be captured from the fuel cell exhaust. Water is preferably fed to the reactor in the form of a mist generated by an atomizer. An exemplary 750 We-h, 400 We PEM fuel cell power system may be characterized by a specific energy of about 550 We-h/kg and a specific power of about 290 We/kg.

The present invention provides a method for promoting hair growth and improving white hair condition, including supplying hydrogen and oxygen to scalp and hair. The present invention further provides a hear wearable device or a hairdressing apparatus for promoting hair growth and improving white hair condition, including a gas supply device, wherein the gas supply device includes a separation layer, a hydrogen-producing composition wrapped in the separation layer, and an oxygen-producing composition wrapped in the separation layer; the hydrogen-producing composition includes: (1) a metal hydroxide and aluminum powder, or (2) a metal peroxide and aluminum powder, or (3) a hydride, or (4) a combination of the three above; and the oxygen-producing composition includes a metal peroxide.

A hydrogen generating method includes generating hydrogen by dehydrogenation-reacting a chemical hydride of a solid state with an acid aqueous solution. The dehydrogenation-reaction is performed by reacting 1 mol of hydrogen atoms of the chemical hydride with an acid and water at a molar ratio of 0.5 to 2.

A dehydrogenation reaction device includes a dehydrogenation reactor having a solid chemical hydride and includes an add aqueous solution tank supplying an add aqueous solution to the dehydrogenation reactor. The dehydrogenation reactor includes a heating device, a cooling apparatus, a porous metal foam, or a combination thereof.