Cu-Co Bimetallic Anodes for Direct Utilization of Methane in SOFCs

Abstract

Cu-Co bimetallic mixtures with ceria and YSZ have been investigated as solid oxide fuel cell (SOFC) anodes. While pure Co is unstable in dry at 1073 K due to severe carbon formation, Cu-Co mixtures with even 90 wt % Co showed only small amounts of carbon following exposure to dry for 2 h at 1073 K. Cells based on Cu-Co mixtures showed improved performance in both and compared to cells prepared with only Cu. Finally, a cell with a 50:50 ratio of Cu and Co was shown to be stable for 500 h in humidified (3 mol % at 1073 K. © 2004 The Electrochemical Society. All rights reserved.