Highly active PtRuFe/C catalyst for methanol electro-oxidation

Abstract High methanol electro-oxidation activity was obtained on novel PtRuFe/C (2:1:1 at.%) catalyst. Mass and specific activities were 5.67 A  g −1 catal. and 177 mA m −2 for the PtRuFe/C catalyst while those of the commercial PtRu/C catalyst were 2.28 A g −1  catal. and 87.7 mA m −2 , respectively. CO stripping results showed that on-set voltage for CO electro-oxidation was lowered by incorporation of Fe. XRD and XPS results revealed that Fe 2 O 3 was formed instead of Fe(0), which resulted in large electron deficiency in Pt and easy CO electro-oxidation. The electron deficiency of Pt was proved by XPS results of Pt4f peaks, which moved to higher binding energies in PtRuFe/C than PtRu/C.

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