Electrode kinetics of the Ni porous electrode for hydrogen production in the molten carbonate electrolysis cell (MCEC)

• The hydrogen evolution reaction in molten carbonate salts is an important process in the development of the molten carbonate electrolysis cell (MCEC). In the present study the kinetics of hydrogen production in the Ni porous electrode in a MCEC is investigated. The general procedure is to determine the reaction orders of hydrogen, carbon dioxide and water. For this purpose steady-state polarization data were recorded under different gas compositions and temperatures. The exchange current densities were calculated from the slopes of the polarization curves at low overpotential. On the basis of that, the partial pressure dependencies of hydrogen, carbon dioxide and water could be determined in the electrolysis operation.

Subject headings

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

Keyword

Carbon

Carbon dioxide

Carbonation

Electrodes

Electrolysis

Electrolytic cells

Nickel

Polarization

Electrode kinetics

Exchange current densities

Hydrogen evolution reactions

Molten carbonate salts

Polarization curves

Porous electrodes

Pressure dependencies

Steady state polarization

Hydrogen production

Publication and Content Type

ref (subject category)

kon (subject category)