Catalysis of water dissociation by the phosphoric-acid groups of an MB-3 bipolar membrane
Commercial MB-3 bipolar membranes were studied by the impedance method in the mode of H/sup +/ and OH/sup -/ ion generation. The overvoltage of the bipolar and monopolar region and the rate constant of dissociation of water molecules in the bipolar region of the membrane were calculated as functions of current density. The linearity of the current-voltage characteristic in the bipolar region, the lack of an effect of the electric field on the rate constant, and a 3.5 order-of-magnitude difference between this rate constant and that found in pure water are explained in terms of catalysis by phosphoric-acid groups. This conclusion is confirmed by a calculation of the water dissociation constant from known equilibrium and recombination constants under conditions when dissociation involves the phosphoric-acid groups.
- Research Organization:
- Kuban State Univ., Krasnodar, USSR
- OSTI ID:
- 6565200
- Journal Information:
- Sov. Electrochem. (Engl. Transl.); (United States), Vol. 22:6; Other Information: Translated from Elektrokhimiya 22: No. 6, 791-795(Jun 1986)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROGEN PRODUCTION
ELECTROLYSIS
ORGANIC ION EXCHANGERS
CATALYTIC EFFECTS
PHOSPHORIC ACID
WATER
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CURRENT DENSITY
ELECTRIC IMPEDANCE
ELECTROCATALYSTS
ELECTROLYTIC CELLS
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
ION EXCHANGE
KINETIC EQUATIONS
MEMBRANES
METHYL IODIDE
CATALYSTS
EQUATIONS
HALOGENATED ALIPHATIC HYDROCARBONS
IMPEDANCE
INORGANIC ACIDS
IODINATED ALIPHATIC HYDROCARBONS
ION EXCHANGE MATERIALS
KINETICS
LYSIS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
OXYGEN COMPOUNDS
RADICALS
REACTION KINETICS
YIELDS
080101* - Hydrogen- Production- Electrolysis