EELS Measurement of Rhodium (Rh)
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Pearson et al. [1] experimentally and theoretically (based on one-electron Hartree-Slater calculations) found that the intensities of L2,3 white lines for most of the 3d and 4d transition metals decreased nearly linearly with increasing atomic number, reflecting the filling of the d states. Figure 3424a shows the deconvoluted and background-subtracted L2,3 energy-loss spectra for the 4d transition metals. The edge energies are not shown in order to present all the spectra on the same figure, while the intensities of the white lines are scaled simultaneously for all elements.

The deconvoluted and background-subtracted L2,3 energy-loss spectra for the 4d transition metals.

Figure 3424a. The deconvoluted and background-subtracted L2,3 energy-loss spectra for the 4d transition metals. [1]

Figure 3424b shows an EEL spectrum recorded in spot mode inside a catalytic particle, presenting Rh-M3, O-K, and Ce-M4,M5 white lines.

EEL spectrum presenting Rh-M3, O-K, and Ce-M4,M5 white lines

Figure 3424b. EEL spectrum presenting Rh-M3, O-K, and Ce-M4,M5 white lines. [2]

 

 

 

 

 

 

[1] D. H. Pearson, C. C. Ahn, and B.Fultz, White lines and d-electron occupancies for the 3d and 4d transition metals, Physical Review B, 47(14), (1993) 8471-8478.
[2] S. Bernal, G. Blanco, J.J. Calvino, C. López-Cartes, J.A. Pérez-Omil, J.M. Gatica, O. Stephan a and C. Colliex, Electron microscopy (HREM, EELS) study of the reoxidation conditions for recovery of NM/CeO2 (NM: Rh, Pt) catalysts from decoration or alloying phenomena, Catalysis Letters Vol. 76, No. 3–4, 2001.

 

 

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