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Intermediate temperature solid oxide fuel cells with Cu1.3Mn1.7O4 internal reforming layer
Ist Teil von
Journal of power sources, 2012-03, Vol.201, p.66-71
Ort / Verlag
Amsterdam: Elsevier
Erscheinungsjahr
2012
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
Cu1.3Mn1.7O4 (CMO) spinel catalyst has been synthesized and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and temperature-programmed reduction (TPR) techniques. XRD and SEM results show that well dispersed fine Cu metallic particles were obtained after reduction by methane. TPR result shows that Cu1.3Mn1.7O4-SDC has lower hydrogen consumption and exhibits better catalytic activity than the conventional Ni catalyst. As a result, Cu1.3Mn1.7O4 spinel catalyst has been successfully developed as an internal reforming layer for Ni-SDC anode-supported solid oxide fuel cells (SOFCs) directly operating with methane as the fuel. The cell has demonstrated maximum power densities of 304 and 375 mW cm-2 at 650 and 700 degree C, respectively, and has been successfully operated at a constant current load of 0.6 A cm-2 at 650 degree C over 80 h using methane as the fuel and ambient air as the oxidant. No significant carbon deposition has been observed at selected regions of the Ni-SDC anode after the short-term operating of the cell using methane as the fuel. Using methane as the fuel, the cell with Cu1.3Mn1.7O4 internal reforming layer exhibits similar reaction mechanism to that of H2 oxidation on the Ni-YSZ anode.