| 초록 |
Novel PtRuFe/C (2:1:1 at.%) catalyst was synthesized by a NaBH4 reduction method. By TEM, particle size of the PtRuFe/C catalyst was determined to be 2.6 nm. Mass and specific activities for methanol electro-oxidation obtained in a 1 M H2SO4 + 1 M MeOH solution electrolyte were 5.67 A/g catal. and 177 mA/m2 for the PtRuFe/C catalyst, while those of the commercial PtRu/C catalyst were 2.28 A/g catal. and 87.7 mA/m2, respectively. Incorporation of Fe could lower CO electro-oxidatino on-set voltage which was proven by CO stripping analysis results. From XRD and XPS results, it was found that Fe2O3 was formed instead of Fe(0), which resulted in large electron deficiency in Pt and easy CO electro-oxidation. From XPS results, shift of Pt4f peaks to higher binding energies in PtRuFe/C than PtRu/C proved that electron deficiency of Pt was caused by incorporation of Fe. |
