NMR study of electronic properties of the chemisorption of CO on supported Pt catalysts
Abstract
The authors have analyzed the 13C spin-lattice relaxation of CO chemisorbed on supported Pt particles. They fit their relaxation data with a minimum set of relaxation times (T1) ranging from 0.009 to 6 s at 77 K. They find that each T1 component is inversely proportional to the temperature, but that some T1 components do not satisfy the Korringa relationship. They express the relaxation by conduction electrons in terms of tight-binding coefficients and evaluate the amount of mixing of the CO orbitals with the Pt conduction bands to account for the observed T1. They also analyze data for CO on Ir and Pd.
- Publication:
-
Physical Review B
- Pub Date:
- February 1988
- DOI:
- 10.1103/PhysRevB.37.1417
- Bibcode:
- 1988PhRvB..37.1417A
- Keywords:
-
- 76.60.Cq;
- 73.20.-r;
- 82.65.Jv;
- Chemical and Knight shifts;
- Electron states at surfaces and interfaces