Impact of reforming catalyst on the anodic polarisation resistance in single-chamber SOFC fed by methane

C. Gaudillere (1) , P. Vernoux (1) , D. Farrusseng (1)

1 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon

This paper emphasises the electrochemical and catalytic properties of a Ni-10% GDC (10% gadolinium-doped ceria) cermet anode of a single-chamber solid oxide fuel cell (SC-SOFC). Innovative coupling of electrochemical impedance spectroscopy with gas chromatography measurements was carried out to characterise the anode material using an operando approach. The experiments were conducted in a symmetric anode/electrolyte/anode cell prepared by slurry coating resulting in 100 mu m-thick anode layers. The electrochemical performance was assessed using a two-electrode arrangement between 400 degrees C and 650 degrees C, in a methane-rich atmosphere containing CH4, O-2 and H2O in a 14:2:6 volumetric ratio. The insertion of a Pt-CeO2 based catalyst with high specific surface area inside the cermet layer was found to promote hydrogen production from the Water Gas Shift reaction and consequently to improve the electrochemical performances. Indeed, a promising polarisation resistance value of 12 Omega cm(2) was achieved at 600 degrees C with a catalytic loading of only 15 wt.%. (C) 2010 Elsevier B.V. All rights reserved.

Domaines: Catalyse; Environnement et Société

C. Gaudillere, P. Vernoux, D. Farrusseng. Impact of reforming catalyst on the anodic polarisation resistance in single-chamber SOFC fed by methane. Electrochemistry Communications, 2010, 12 (10), pp.1322-1325. ⟨10.1016/j.elecom.2010.07.010⟩. ⟨hal-00552868⟩