High Cationic Dispersity Boosted Oxygen Reduction Reactivity in Multi-Element Doped Perovskites

Oxygen-ion conducting perovskite oxides are important functional materials for solid oxide fuel cells and oxygen-permeable membranes operating at high temperatures (>500 °C). Co-doped perovskites have recently shown their potential to boost oxygen-related kinetics, but challenges remain in understanding the underlying mechanisms. This...

Direct internal methane reforming in biogas fuelled solid oxide fuel cell; the influence of operating parameters

Internal dry reforming (IDR) of methane for biogas-fed solid oxide fuel cell (SOFC) applications has been experimentally investigated on planar Ni-GDC (cermet anode) electrolyte-supported cells. This study focuses on the effect of CO₂ concentration, current density, operating temperature, and residence time on internal methane dry...

Carbon deposition in porous nickel/yttria-stabilized zirconia anode under methane atmosphere

A commercial solid oxide fuel cell with a Ni/YSZ anode was characterized under a pure methane atmosphere. The amount of deposited carbon increased with an increase in temperature but decreased when the temperature exceeded 700°C. The reactivity of carbon decreased with increasing deposition temperature. Filamentous carbon was deposited from...

Electrical conductivity and defect chemistry of BaxSr1 - xCoyFe1 - yO3 - dBaxSr1?xCoyFe1?yO3? perovskites

Bulk BaxSr1 - xCoyFe1 - yO3 - dBaxSr1?xCoyFe1?yO3? compositions (BSCF) were synthesized by the solid-state reaction method. The electrical conductivity of ceramic bars was measured using a dc four-probe method as a function of temperature in air up to 970 °C. All compositions showed thermally activated p-type semi-conductivity up to ~450 °C and...