Anodic Reaction in Syngas-Fueled Proton-Conducting Solid Oxide Fuel Cells

Anode-supported proton-conducting solid oxide fuel cells (PC-SOFCs) fabricated with two representative oxides, BaCe0.7Zr0.1Y0.1Yb0.1O3-δ (BCZYYb) and BaZr0.8Y0.2O3-δ (BZY), were compared to obtain the insight into electrochemical performances when fueled syngas at 700°C correlation between anode thickness (0.4, 0.8, 1.6 mm) operational stability. We have demonstrated that, in stability tests, BCZYYb exhibited significantly higher maximum power density (MPD) than BZY operating on H2, 1.22 0.48 W/cm2 for cells, but degraded more rapidly syngas. In addition, decreasing enhanced of syngas, a reduction 81, 76, 71% MPD 1.6, 0.4 mm after 30 min. The impedance spectra X-ray diffraction patterns indicated that rapid degradation cerate-based could be mainly attributed considerable increase polarization resistance due phase decomposition electrolyte powder anode. Heterogeneous catalysis was performed study catalytic reaction H2–CO mixture over powders prepared oxides (Ni-BCZYYb Ni-BZY) fixed bed reactor, CO conversion selectivity CO2 CH4 determined. For all powders, continuous production initially observed formation, no significant difference activity trends both powders. An increased residence time substantially decreased normalized yield, which associated potential secondary CH4, or perovskite oxide. Based results heterogeneous cell during operation may primarily carbon coking disproportionation; however, 4 times clearly by resulting from mixture.