Precursor species of carbon monoxide before its dissociation on aluminium-promoted Ni and Cu surfaces
✍ Scribed by C.N.R. Rao; M.K. Rajumon; K. Prabhakaran; M.S. Hegde; P.V. Kamath
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 392 KB
- Volume
- 129
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Carbon monoxide adsorbed on Al-promoted Ni and Cu surfaces undergoes facile dissociation at 300 K or below. CO adsorbed on an Al-promoted Ni surface shows a larger separation (3.5 eV) between the 50 and 40 levels compared to that on a clean Ni surface (3.0 eV), besides exhibiting a low C-O stretching frequency. CO adsorbed on an Al-promoted Cu surface shows a similar large 50-40 separation; this is accompanied by the disappearance of the satellites in the valence band and O(ls) regions. These features of CO adsorbed on Al-promoted Ni and Cu surfaces characterize the precursor to dissociation. Molecular orbital calculations suggest that CO bonds parallel to the Al-oromoted Cu surface. * Contribution No. 365 from the Solid State and Structural Chemistry Unit.