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Abstract
Pt-rare-earth alloys are rarely studied as electrocatalysts for direct ammonia fuel cells. Thus, their electrocatalytic performance of ammonia electro-oxidation is worth studying, especially for PtxEu alloys. Herein, a series of PtxEu/C (x = 1, 3 and 5) electrocatalysts has been prepared using polyol reduction method. Among them, PtEu/C is found to be a promising candidate for ammonia electro-oxidation. Physical characterizations show that PtEu/C has a small lattice parameter and narrow size distribution. X-ray photoelectron spectroscopy peak shifts of PtEu/C indicate the electron transfer from Eu to Pt. Electrochemical measurement results indicate that PtEu/C is highly active. Particularly, it has a higher current density, lower activity loss and apparent activation energy toward ammonia electro-oxidation compared to Pt/C catalyst.
Published Version
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