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  2. Oxyhydrogen - Wikipedia

    en.wikipedia.org/wiki/Oxyhydrogen

    Oxyhydrogen is a mixture of hydrogen (H 2) and oxygen (O 2) gases. This gaseous mixture is used for torches to process refractory materials and was the first [1] gaseous mixture used for welding. Theoretically, a ratio of 2:1 hydrogen:oxygen is enough to achieve maximum efficiency; in practice a ratio 4:1 or 5:1 is needed to avoid an oxidizing ...

  3. Oxygen evolution - Wikipedia

    en.wikipedia.org/wiki/Oxygen_evolution

    The "oxygen evolution reaction (OER) is the major bottleneck [to water electrolysis] due to the sluggish kinetics of this four-electron transfer reaction." [6] All practical catalysts are heterogeneous. Diagram showing the overall chemical equation. Electrons (e −) are transferred from the cathode to protons to form hydrogen gas. The half ...

  4. Gas evolution reaction - Wikipedia

    en.wikipedia.org/wiki/Gas_evolution_reaction

    A gas evolution reaction is a chemical reaction in which one of the end products is a gas such as oxygen or carbon dioxide. [ 1 ] [ 2 ] Gas evolution reactions may be carried out in a fume chamber when the gases produced are poisonous when inhaled or explosive.

  5. Electrolytic cell - Wikipedia

    en.wikipedia.org/wiki/Electrolytic_cell

    When driven by an external source of voltage, hydrogen (H +) ions flow to the cathode to combine with electrons to produce hydrogen gas in a reduction reaction. Likewise, hydroxide (OH −) ions flow to the anode to release electrons and a hydrogen (H +) ion to produce oxygen gas in an oxidation reaction.

  6. Chemical reaction - Wikipedia

    en.wikipedia.org/wiki/Chemical_reaction

    One example of a decomposition reaction is the electrolysis of water to make oxygen and hydrogen gas: + Single displacement In a single displacement reaction , a single uncombined element replaces another in a compound; in other words, one element trades places with another element in a compound [ 21 ] These reactions come in the general form ...

  7. Electrolysis of water - Wikipedia

    en.wikipedia.org/wiki/Electrolysis_of_water

    Hydrogen gas released in this way can be used as hydrogen fuel, but must be kept apart from the oxygen as the mixture would be extremely explosive. Separately pressurised into convenient 'tanks' or 'gas bottles', hydrogen can be used for oxyhydrogen welding and other applications, as the hydrogen / oxygen flame can reach approximately 2,800°C.

  8. Hydrox (breathing gas) - Wikipedia

    en.wikipedia.org/wiki/Hydrox_(breathing_gas)

    Hydrox, a gas mixture of hydrogen and oxygen, is occasionally used as an experimental breathing gas in very deep diving. [ 1 ] [ 2 ] It allows divers to descend several hundred metres. [ 3 ] [ 4 ] [ 5 ] Hydrox has been used experimentally in surface supplied, saturation, and scuba diving, both on open circuit and with closed circuit rebreathers.

  9. Hydrogen-oxidizing bacteria - Wikipedia

    en.wikipedia.org/wiki/Hydrogen-oxidizing_bacteria

    In geothermal processes, hydrogen is usually present as a gas and may be obtained by different reactions: 1. Water may react with the silicon radical at high temperature: Si· + H 2 O → SiOH + H· H· + H· → H 2. 2. A proposed reaction between iron oxides and water may occur at temperatures higher than 800 °C: 2FeO + H 2 O → Fe 2 O 3 + H 2