Oxidation of hydroxide ions at platinum modified zeolite electrode

Abstract

NaX zeolite was modified by platinum via impregnation/thermal decomposition technique, using Pt(II)-acetylacetonate in acetone as an impregnating solution. The samples were characterized by scanning electron microscopy. The mixture of modified zeolite and 10 wt. % of carbon black, in a form of thin layer, was pasted to a glassy carbon surface by nafion. The hydroxide ion oxidation was studied on this electrode by cyclic voltammetry. The response of modified zeolite electrodes was compared with platinum electrode, bare and covered with nafion film. The presence of nafion improved reproducibility of both covered platinum electrode and platinum modifed zeolite electrode.