Internal methanol reforming over Samaria-doped ceria electrode in solid oxide fuel cell

摘要

Methanol reforming was studied over a ceria-based electrode-catalyst in a solid oxide fuel cell under open- and close- circuit conditions. Different additive contents of Samaria-doped ceria (SDC), i.e., (CeO2)(1-x)(SmO1.5)(X), were investigated to determine its possible application as an electrode-catalyst. Experiments were performed over a temperature range of 750 similar to 900) degreesC and under a steam/methanol molar ratio of 2. It may be concluded that the selectivity for methanol reforming is associated with the oxygen ionic conductivity. It: was found that the Ni-SDC cermet exhibited a higher open-circuit potential than did that of Ni-YSZ (Yttria-stabilized zirconia). Furthermore, (CeO2)(0.9)(SmO1.5)(0.1) showed the highest depolarization ability in the SDC system because of the enhancement of electrical conductivity and also had the highest selectivity for methanol reforming. [References: 9]