Development of Carbon and Sulphur Tolerant Anodes of Solid Oxide Fuel Cells
Final project rept. 3 Aug 2007-2 Aug 2009
NANYANG TECHNOLOGICAL UNIV (SINGAPORE)
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GDC-impregnated NiGDC anodes show the significant enhancement of the sulfur-tolerance of the anodes. However, the microstructure of GDC-impregnated NiGDC anodes still changes significantly in H2S-H2, indicating that GDC nanoparticles may not be able to completely inhibit the poisoning effect of sulfur on NiGDC anodes under present conditions studied. Co-impregnation of Pd-CeO2 was found to be most effective to enhance the activity of the NiGDC anodes for the hydrogen oxidation reaction in H2S-H2 and the polarization performance is stable under the condition of 100 ppm H2S-H2 and 200 mAcm-2 at 800oc for 50 hrs. Most important, the SEM results indicate that the impregnated Pd-CeO2 nanoparticles are effective to retard the poisoning effect of sulfur on the microstructure of NiGDC anodes, as compared the inhibiting effect of impregnation of Pd or GDC nanoparticles separately.
- Electrochemical Energy Storage