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  2. Hydrogen purification - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_purification

    Hydrogen can be purified by passing through a membrane composed of palladium and silver. Permeability of the former to hydrogen was discovered back in the 1860s. [2] An alloy with a ca. 3:1 ratio for Pd:Ag is more structural robust than pure Pd, which is the active component that allows the selective diffusion of H 2 through it.

  3. Hydrogen production - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_production

    High pressure electrolysis is the electrolysis of water by decomposition of water (H 2 O) into oxygen (O 2) and hydrogen gas (H 2) by means of an electric current being passed through the water. The difference with a standard electrolyzer is the compressed hydrogen output around 120–200 bar (1740–2900 psi , 12–20 MPa ). [ 146 ]

  4. High-pressure electrolysis - Wikipedia

    en.wikipedia.org/wiki/High-pressure_electrolysis

    Ultrahigh-pressure electrolysis is high-pressure electrolysis operating at 340–690 bars (5,000–10,000 psi). [8] At ultra-high pressures the water solubility and cross-permeation across the membrane of H 2 and O 2 is affecting hydrogen purity, modified PEMs are used to reduce cross-permeation in combination with catalytic H 2 /O 2 recombiners to maintain H 2 levels in O 2 and O 2 levels in ...

  5. Popular bottled water brands contain toxic 'forever chemicals ...

    www.aol.com/lifestyle/2020-10-09-popular-bottled...

    Consumer Reports recently tested 47 bottled waters — including 35 noncarbonated and 12 carbonated options — and found levels of "toxic PFAS chemicals" in several popular brands that were above ...

  6. Electrolysis of water - Wikipedia

    en.wikipedia.org/wiki/Electrolysis_of_water

    Considering the industrial production of hydrogen, and using current best processes for water electrolysis (PEM or alkaline electrolysis) which have an effective electrical efficiency of 70–80%, [68] [73] [74] producing 1 kg of hydrogen (which has a specific energy of 143 MJ/kg) requires 50–55 kW⋅h (180–200 MJ) of electricity.

  7. Hexagonal water - Wikipedia

    en.wikipedia.org/wiki/Hexagonal_water

    This is an accepted version of this page This is the latest accepted revision, reviewed on 8 September 2024. Term in marketing scam For the water surface phenomenon, see Exclusion zone (physics). For the six-sided shape freezing water takes in nature, see snowflake. Hexagonal water, also known as gel water, structured water, cluster water, H3O2 or H 3 O 2 is a term used in a marketing scam ...

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