Copper (II) selective electrode based on chalcogenide materials: study of the membrane/solution interface with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy

C. Cali (1) , Dominique Foix (2) , G. Taillades (1) , Elisabeth Siebert (3) , Danielle Gonbeau (2) , Annie Pradel (1) , Michel Ribes (1)

1 LPCMC - Laboratoire de physico-chimie de la matière condensée
2 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux
3 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces

The response of copper (II) ion-selective electrodes based on chalcogenide glassy–crystalline Cu–As–S alloys is described. The potentiometric measurements showed a Nernstian behavior in a large range of copper (II) concentration with short response time and a detection limit close to 1×10⁻⁶ M. The selectivity and the effect of the pH on the response have been determined. The chalcogenide membrane/solution interface has been investigated using electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS) in order to understand the sensing properties.

Mots clés: Chalcogenide glass; Electrode/solution interface; Copper (II) sensor; EIS; XPS

Domaines: Matériaux

C. Cali, Dominique Foix, G. Taillades, Elisabeth Siebert, Danielle Gonbeau, et al.. Copper (II) selective electrode based on chalcogenide materials: study of the membrane/solution interface with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. Materials Science and Engineering: C, 2002, 21 (1-2), pp. 3-8. ⟨10.1016/S0928-4931(02)00053-X⟩. ⟨hal-00418191⟩