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Encyclopedia > Water splitting

Water splitting is the general term for a chemical reaction in which water is converted into oxygen and hydrogen. Water splitting is actively researched because demand for cheap hydrogen is expected to rise with the new hydrogen economy. A chemical reaction is a process that results in the interconversion of chemical substances [1]. The substance or substances initially involved in a chemical reaction are called reactants. ... Water (from the Old English word wæter; c. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... A hydrogen economy is a hypothetical future economy in which the primary form of stored energy for mobile applications and load balancing is hydrogen (H2). ...


Current water splitting methods include

Active research Steam reforming is a method of producing hydrogen. ... In chemistry and manufacturing, electrolysis is a method of separating bonded elements and compounds by passing an electric current through them. ... The water gas shift reaction is a organic reaction in which water and carbon monoxide react to carbon dioxide and hydrogen (water splitting) CO + H2O → CO2 + H2 The water gas shift reaction is part of steam reforming of hydrocarbons and is involved in the chemistry of catalytic converters Categories: Inorganic...

In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst. ... Artificial photosynthesis is a man-made process that attempts to replicate the natural process of photosynthesis, converting sunlight and carbon dioxide into carbohydrates and oxygen. ... High-temperature electrolysis is a method currently being investigated for the production of hydrogen from water with oxygen as a by-product. ...

References

[1] Strategies for the Development of Visible-light-driven Photocatalysts for Water Splitting Akihiko Kudo, Hideki Kato1 and Issei Tsuji Chemistry Letters Vol. 33 (2004) , No. 12 p.1534 my name is garima


  Results from FactBites:
 
Electrodialytic water splitting process and apparatus for conversion of alkali metal sulfate values derived from spent ... (6815 words)
The process of claim 1 wherein the electrodialytic water splitter is a three-compartment electrodialytic water splitter, each unit cell consisting of a base compartment, an acid compartment and a salt compartment; the base, acid and salt compartments being formed by alternating cation, bipolar and anion membranes.
With the three-compartment electrodialytic water splitter, a reaction liquid comprising a reduced amount of alkali metal sulfate values as compared to the liquid fed to the remaining compartments is produced in the salt compartment.
The present invention provides electrodialytic water splitting processes that may be operated in two- or three-compartment unit cells to convert alkali metal sulfate values obtained from or contained in spent rayon spin baths into aqueous alkali metal hydroxide and alkali metal sulfate/sulfuric acid.
Science Projects - Splitting Water (442 words)
Water is a simple chemical made from two gases -- hydrogen and oxygen.
If an electrical current is passed through water between electrodes (the positive and minus poles of a battery), the water is split into its two parts: oxygen and hydrogen.
That's because the oxygen atoms from the water combine in the liquid with the salt to form hydroxyl ions.
  More results at FactBites »

 
 

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