Please use this identifier to cite or link to this item: http://rportal.lib.ntnu.edu.tw:80/handle/77345300/42329
Title: Chemical Transformation from FePt to Fe1-xPtMx (M = Ru, Ni, Sn) Nanocrystals by a Cation Redox Reaction: X-ray Absorption Spectroscopic Studies
Authors: 國立臺灣師範大學化學系
D.-Y. Wang
C.-H. Chen
H.-C. Yen
Y.-L. Lin
P.-Y. Huang
B.-J. Hwang
Chia-Chun Chen
Issue Date: 14-Feb-2007
Publisher: American Chemical Society
Abstract: New ternary metal nanocrystals of Fe1-xPtMx (M = Ru3+, Sn2+, or Ni2+) were synthesized by chemical transformation from FePt nanocrystals using a cation redox reaction in a solution. The structure and composition of resulting nanocrystals were characterized by high-resolution transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and X-ray photoemission spectroscopy (XPS). Moreover, X-ray absorption near-edge spectroscopy (XANES) was employed to confirm the chemical transformation from FePt to Fe1-xPtRux nanocrystals. The analyses of extended X-ray absorption find structure (EXAFS) revealed the detailed binding structures and coordination numbers of both FePt and Fe1-xPtRux nanocrystals. The results suggested that iron atoms of FePt lattices were oxidized to be Fe2+ and Fe3+ ions and were replaced by ruthenium atoms from the reduction of Ru3+ ions in solution to form Fe1-xPtRux lattices. Our method has opened a new route to easily and rapidly prepare a solid-solution type of ternary metal nanocrystals for catalytic applications.
URI: http://rportal.lib.ntnu.edu.tw/handle/77345300/42329
ISSN: 0002-7863
Other Identifiers: ntnulib_tp_C0301_01_045
Appears in Collections:教師著作

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