Ir(0) 60.8 +/- 0.2 eV (see figure, lineshape of LA(1.13,1.9,5))
IrO2 61.6 +/-0.5 eV
IrBrx 61.7+/-0.5 eV
IrClx 62.2+/-0.7 eV
IrIx 61.9+/-0.6 eV
Ir 4f7/2 - 4f5/2 separation: 2.93+/-0.05 eV, [2] specifies a splitting of 2.98 eV
Ir 4d5/2: 297 eV
Ir 4d3/2: 312 eV
Ir 4p3/2: 495 eV
Ir 4p1/2: 578 eV
Ir 4s: 692 eV
Ir 5p: 48 eV
Ir 5s: 96 eV
 |
| Ir 4f spectrum of sputter cleaned iridium metal. |
From a quick look at the literature there may be some complex species possible that may complicate the fitting. A second oxide peak may be found in some instances at higher binding energies (61.9-63.7 eV) than seen for IrO2 [3]. Hall also sets the oxide doublet-separation to 3.03 eV.
References:
[1] C.D. Wagner, A.V. Naumkin, A. Kraut-Vass, J.W. Allison, C.J. Powell, J.R.Jr. Rumble, NIST
Standard Reference Database 20, Version 3.4 (web version) (http:/srdata.nist.gov/xps/) 2003.
[2] J.F. Moulder, W.F. Stickle, P.E. Sobol, K.D. Bomben, Handbook of X-ray Photoelectron Spectroscopy, Perkin-Elmer Corp., Eden Prairie, MN, 1992.
[3] H.Y. Hall, P.M.A. Sherwood, J. Chem. Soc. Faraday Trans.1 80 (1984) 135-152.
