Effect of surface structure on the adsorption of Co(II) on {alpha}-Al{sub 2}O{sub 3}: A glancing angle XAFS study
Conference
·
OSTI ID:94032
- Stanford Univ., CA (United States)
- Lawrence Livermore National Lab., CA (United States)
Glancing-angle x-ray absorption fine structure (XAFS) spectroscopy has been used to characterize the structure of Co(II) complexes adsorbed from aqueous solution on single crystal {alpha}-Al{sub 2}O{sub 3} surfaces. The spectra reveal considerable differences in the local structure, as a function of both the crystallographic face and the orientation of the sample with respect to the beam polarization. Data analysis indicates that the predominant mode of Co chemisorption is as a tridentate CoO{sub 6} octahedral complex edge-shared with surface Al octahedra. For systems where this method is feasible, it is the technique of choice for characterizing metal ion adsorption complexes.
- OSTI ID:
- 94032
- Report Number(s):
- CONF-941144--; ISBN 1-55899-258-8
- Country of Publication:
- United States
- Language:
- English
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