CH_4 REACTIVITY OF APATITE SYSTEMS OF RELEVANCE TO SOLID OXIDE FUEL CELL APPLICATIONS

摘要

The apatite systems, La_(9.33)Si_6O_(26), La_(9.67)Si_5MO_(26) (M=Fe, Co) have been examined for their CH_4 reactivity. The results show that the undoped La_(9.33)Si_6O_(26) shows negligible activity for CH4 oxidation, while this is enhanced significantly on Fe, Co incorporation. XPS studies show that the surface is deficient in both Si and the transition metal, compared to the bulk.