Abstract
Exptl. data of the diffusion limiting c.d. are presented for hydrogen oxidn. in a gas diffusion electrode (GDE) used in fuel cells under various conditions. The current densities were obtained using mixts. of hydrogen and inert gases. To elucidate the dependence of the overall mass transport coeff., a simplified model to describe the transport of hydrogen in a GDE, based on literature models, was derived. The GDE consists of a hydrophobic and a hydrophilic layer, i.e., a porous backing and a reaction layer. The transport rate of hydrogen under the exptl. conditions is detd. by hydrogen gas diffusion in the pores of the porous backing as well as in the macropores of the reaction layer. Diffusion of dissolved hydrogen in the micropores of the reaction layer, through the liq., is of little significance
| Original language | English |
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| Title of host publication | Electrochemical engineering and energy : [proceedings of the Third European Symposium on Electrical Engineering, held March 23 - 25, 1994, in Nancy, France] |
| Editors | F. Lapicque |
| Place of Publication | New York |
| Publisher | Plenum Press |
| Pages | 47-56 |
| ISBN (Print) | 0-306-44887-4 |
| Publication status | Published - 1994 |
| Event | conference; European Symposium on Electrical Engineering ; 3 (Nancy) : 1994.03.23-25; 1994-03-23; 1994-03-25 - Duration: 23 Mar 1994 → 25 Mar 1994 |
Conference
| Conference | conference; European Symposium on Electrical Engineering ; 3 (Nancy) : 1994.03.23-25; 1994-03-23; 1994-03-25 |
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| Period | 23/03/94 → 25/03/94 |
| Other | European Symposium on Electrical Engineering ; 3 (Nancy) : 1994.03.23-25 |