Community Research and Development Information Service - CORDIS

Abstract

The high temperature cathodic reduction of the water molecule at the interface Pt/CeO-(2-x) Double Layer Electrode - Yttria Stabilized Zirconia has been investigated. Two different rate determining processes are involved depending on the current density. In the low current density range a Tafel's type kinetic behaviour was found, with an activation free enthalpy around 22 kcal/mole. The rate determining process has been identified in the transport of the oxygen atoms through the CeO-(2-x) layer. At high currents a lack of any apparent additional, nonohmic contribution to the total overvoltage was put into evidence. At any rate, such DLE resulted in a worsening of the energetic yield of the cathodic process with respect to the porous platinum/YSZ as well as Pt/cerium doped YSZ.

Additional information

Authors: BARBI G B JRC ISPRA ESTAB. (ITALY) MARI C M UNIVERSITA DI MILANO (ITALY) , JRC ISPRA ESTAB. (ITALY);UNIVERSITA DI MILANO (ITALY)
Bibliographic Reference: SOLID STATE IONICS, VOL. 15 (1985), PP. 335-343
Record Number: 1989124031000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top