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Rare Earth Eu Doped PtRu/C Catalysts and Their Properties for Methanol Electrooxidation

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稀土Eu掺杂PtRu_C催化剂及其对甲醇电氧化的性能_安筱莎.pdf (732.3Kb)
Date
2010-05
Author
An, Xiao-Sha
Chen, De-Jun
Zhou, Zhi-You
周志有
Wang, Qiang
Fan, You-Jun(Guangxi Normal Univ, Coll Chem & Chem Engn)
Sun, Shi-Gang
孙世刚
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  • 化学化工-已发表论文 [14469]
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Abstract
Commercially available PtRu/C catalyst was doped with Eu by chemical reduction and sintering, resulting in PtRuEux/C catalysts with different Eu contents. The catalysts were characterized by transmission electron microscopy (TEM), energy dispersive X-ray (EDX) spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Results showed that Eu doping did not change the average size of the PtRu/C catalysts (ca 3 nm), and their surfaces were modified by both Eu metal and oxide. Cyclic voltammetry and chronoamperometry demonstrated that the activity of the PtRuEux/C catalysts was higher than that of commercial PtRu/C for methanol electrooxidation. Among the PtRuEux/C catalysts, PtRuEu0.3/C exhibited the best performance. The electrocatalytic oxidation of methanol on the catalyst was further investigated by in situ Fourier transform infrared (FTIR) spectroscopy at molecular level. Results indicated that the adsorbed species derived from the dissociative adsorption of methanol on the catalysts were linear. bonded CO (COL). Eu doping decreased the oxidation potential of COL and thus significantly enhanced the activity of the catalysts and their tolerance to CO.
Citation
ACTA PHYSICO-CHIMICA SINICA,2010,26(5):1207-1213
URI
http://dx.doi.org/doi:CNKI:SUN:WLHX.0.2010-05-006
https://dspace.xmu.edu.cn/handle/2288/3494

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