Abstract
Promoting effects of the additives such as MgO, CaO, BaO, and Cr2O3 to Ni-SDC (samarium-doped ceria) anodes were investigated on hydrogen oxidation and dry reforming of methane (DRM) activity. The additives were found to elevate current-voltage characteristics of H2-O2 fuel cells. The polarization resistance for H2 oxidation at the anodes was mainly decreased by the additives. The carbon balance in DRM reaction at open circuit voltage (OCV) approached 100% over the modified Ni-SDC anodes. The DRM activity was most promoted by the Cr2O3 additive, leading the highest OCV in direct DRM operation.
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