Silver-exchanged zeolite Y-modified electrodes: size selectivity for anions

The cyclic voltammetric (CV) behavior of silver ions encapsulated into zeolite Y (NaY) has been investigated in aqueous solution containing different anions. It was found that the electroactivity of silver ions relied on the solvated anionic radii. Cl− and Br− anions suppressed the electroactivity of silver ions. PMT− (1-phenyl-5-mercaptotetrazole) and SO32− anions, however, had little influence on this, which implies that silver-exchanged zeolite Y-modified electrodes have a high selectivity for Cl− and Br− anions.