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  2. Electrolysed water - Wikipedia

    en.wikipedia.org/wiki/Electrolysed_water

    An AA battery in a glass of tap water with salt showing hydrogen produced at the negative terminal. Electrolysed water (also electrolyzed water, EOW, ECA, electrolyzed oxidizing water, electro-activated water, super-oxidized solution or electro-chemically activated water solution) is produced by the electrolysis of ordinary tap water containing dissolved sodium chloride. [1]

  3. Hofmann voltameter - Wikipedia

    en.wikipedia.org/wiki/Hofmann_voltameter

    The amount of electricity that has passed through the system can then be determined from the volume of gas. Thomas Edison used voltameters as electricity meters.. A Hofmann voltameter is often used as a demonstration of stoichiometric principles, as the two-to-one ratio of the volumes of hydrogen and oxygen gas produced by the apparatus illustrates the chemical formula of water, H 2 O.

  4. Electrolysis of water - Wikipedia

    en.wikipedia.org/wiki/Electrolysis_of_water

    Pure water has a charge carrier density similar to semiconductors [12] [page needed] since it has a low autoionization, K w = 1.0×10 −14 at room temperature and thus pure water conducts current poorly, 0.055 μS/cm. [13] Unless a large potential is applied to increase the autoionization of water, electrolysis of pure water proceeds slowly ...

  5. Alkaline water electrolysis - Wikipedia

    en.wikipedia.org/wiki/Alkaline_water_electrolysis

    Typically, Nickel based metals are used as the electrodes for alkaline water electrolysis. [15] Considering pure metals, Ni is the least active non-noble metal. [16] The high price of good noble metal electrocatalysts such as platinum group metals and their dissolution during the oxygen evolution [17] is a drawback.

  6. Anion exchange membrane electrolysis - Wikipedia

    en.wikipedia.org/wiki/Anion_exchange_membrane...

    The lifetimes of PEM electrolyser stacks range from 20,000 h to 80,000 h. [9] [8] Literature surveys have found that AEM electrolyser durability is demonstrated to be >2000 h, >12,000 h, and >700 h for pure water-fed (Pt group catalyst on anode and cathode), concentrated KOH-fed, and 1wt% K 2 CO 3-fed respectively. [9]

  7. Electrodeionization - Wikipedia

    en.wikipedia.org/wiki/Electrodeionization

    Electrodeionization (EDI) is a water treatment technology that utilizes DC power, ion exchange membranes, and ion exchange resin to deionize water. EDI is typically employed as a polishing treatment following reverse osmosis (RO), and is used in the production of ultrapure water. It differs from other RO polishing methods, like chemically ...

  8. Electrolysis - Wikipedia

    en.wikipedia.org/wiki/Electrolysis

    This became known as the Hall–Héroult process which benefited many industries because aluminum's price then dropped from four dollars to thirty cents per pound. [15] In 1902 Polish engineer and inventor Stanisław Łaszczyński filed for and obtained Polish patent for the electrolysis of copper and zinc. [16] [17] [18]

  9. Proton exchange membrane electrolysis - Wikipedia

    en.wikipedia.org/wiki/Proton_exchange_membrane...

    Proton exchange membrane (PEM) electrolysis is the electrolysis of water in a cell equipped with a solid polymer electrolyte (SPE) [3] that is responsible for the conduction of protons, separation of product gases, and electrical insulation of the electrodes. The PEM electrolyzer was introduced to overcome the issues of partial load, low ...