Theoretical foundations
Acid membrane water electrolyzers
Archive REF: J4810 V1
Theoretical foundations
Acid membrane water electrolyzers

Author : Pierre MILLET

Publication date: September 10, 2007 | Lire en français

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2. Theoretical foundations

2.1 Thermodynamic aspect

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2.1.1 Electrolysis voltage

In a water electrolysis cell, electric current is used to dissociate water into its elementary constituents, molecular hydrogen (H 2 ) and oxygen (O 2 ). In an acid medium (the case of an acid membrane electrolyzer), this reaction breaks down into two half-reactions:

H2O12O2+2H++2e

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