Abstract
The NMR line position of chemisorbed on and electrodes was measured as a function of the potential of the electrode with respect to a reference, in the ranges of to for and to for . The lines shifted at rates of for and for . This effect is much too large to be ascribed to shielding effects due to local electric fields. It is assigned to a change in the Knight shift, as demonstrated from the associated change in the spin-lattice relaxation rate. This change in Knight shift with potential is indicative of charge transfer processes between the electrode and the adsorbed .
- Received 29 March 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.2457
©1999 American Physical Society