Abstract
The electrode kinetics of oxidation and reduction of H2/H2O and CO/CO2 at the metal/yttria stabilized zirconia (YSZ) interface were studied using model metal wire electrodes contacting polished YSZ pellets. The intent was to probe the reaction mechanisms by comparing the same reactions using different metals (Ag, Au, Cu, Ni, Pd, and Pt) under identical conditions relevant to fuel cell and electrolysis cell operation (e.g. including 50% H2/H2O and 50% CO/CO2). Impedance spectra were measured at open-circuit voltage and under polarization, and polarization sweeps were performed. The gas composition and temperature were varied to examine how the electrochemical measurements varied, to facilitate identifying the electrode rate-limiting processes. Possible mechanisms that may explain these and other details are discussed.
| Original language | English |
|---|---|
| Journal | E C S Transactions |
| Volume | 25 |
| Issue number | 2 |
| Pages (from-to) | 1945-1955 |
| ISSN | 1938-5862 |
| DOIs | |
| Publication status | Published - 2009 |
| Event | 216th ECS Meeting: 11th International Symposium B10 - Solid Oxide Fuel Cells - Vienna, Austria Duration: 4 Oct 2009 → 9 Oct 2009 Conference number: 216 http://www.electrochem.org/meetings/biannual/216/216.htm |
Conference
| Conference | 216th ECS Meeting |
|---|---|
| Number | 216 |
| Country | Austria |
| City | Vienna |
| Period | 04/10/2009 → 09/10/2009 |
| Internet address |
Bibliographical note
Copyright The Electrochemical Society, Inc. [2009]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).Keywords
- Solid Oxide Fuel Cells
- Fuel Cells and hydrogen