TY - JOUR
T1 - Reduction of metal ions in dilute solutions using a GBC-reactor. Part II: Theoretical model for the hydrogen oxidation in a gas diffusion electrode at relatively low current densities
AU - Portegies Zwart, I.
AU - Jansen, J.K.M.
AU - Janssen, L.J.J.
PY - 2001
Y1 - 2001
N2 - The GBC-reactor is based on the combination of a gas diffusion anode and a porous cathode. A theoretical model for gas diffusion electrode, valid at relatively low current densities, is derived. This is based on the pseudohomogeneous film model including an approximation of the Volmer–Tafel mechanism for the hydrogen oxidation kinetics. Results show a severe mass transfer limitation of the hydrogen oxidation reaction inside the active layer of the gas diffusion electrode, even at low current densities. Empirical formulae are given to estimate whether leakage of dissolved hydrogen gas into the bulk electrolyte occurs at specific process conditions. A simplified version of the model, the reactive plane approximation, is presented.
AB - The GBC-reactor is based on the combination of a gas diffusion anode and a porous cathode. A theoretical model for gas diffusion electrode, valid at relatively low current densities, is derived. This is based on the pseudohomogeneous film model including an approximation of the Volmer–Tafel mechanism for the hydrogen oxidation kinetics. Results show a severe mass transfer limitation of the hydrogen oxidation reaction inside the active layer of the gas diffusion electrode, even at low current densities. Empirical formulae are given to estimate whether leakage of dissolved hydrogen gas into the bulk electrolyte occurs at specific process conditions. A simplified version of the model, the reactive plane approximation, is presented.
U2 - 10.1023/A:1017565501352
DO - 10.1023/A:1017565501352
M3 - Article
SN - 0021-891X
VL - 31
SP - 629
EP - 639
JO - Journal of Applied Electrochemistry
JF - Journal of Applied Electrochemistry
IS - 6
ER -