Individual Fe-Co alloy nanoparticles on carbon nanotubes:: Structural and catalytic properties

被引：182

作者：

Zhang, Jian ^{[1
]}

Mueller, Jens-Oliver ^{[1
]}

Zheng, Weiqing ^{[1
]}

Wang, Di ^{[1
]}

Su, Dangsheng ^{[1
]}

Schloegl, Robert ^{[1
]}

机构：

[1] Fritz Haber Inst, Max Planck Soc, Dept Inorgan Chem, D-1000 Berlin, Germany

来源：

NANO LETTERS | 2008年 / 8卷 / 09期

关键词：

D O I：

10.1021/nl8011984

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the synthesis, characterization, and catalytic performance of Fe-Co alloy nanoparticles inside the tubular channel of carbon nanotubes. The homogeneous distributions of Fe and Co in the isolated nanoparticles were evidenced confidentially by bulk and surface structural and compositional characterizations, that is, scanning electron microscopy, high-resolution transmission electron microscope in combination with elemental mapping by energy dispersive X-ray spectroscopy and electron energy-loss spectroscopy, powder X-ray diffraction, and X-ray photoelectron spectroscopy. We also demonstrate for the first time an unusual synergism in alloy catalysis. The alloy nanoparticles with widely varying Co/Fe ratio are kept as active as Cc for the H-2 production from NH3 decomposition. The stability of Co was significantly improved by alloying with Fe. We expect our experimental method to be a general approach to elucidate the synergism phenomenon in alloy catalysis.

引用

页码：2738 / 2743

页数：6

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