Characterization of porous texture of cermet electrode for steam electrolysis at intermediate temperature - Laboratoire Interfaces et Systèmes Electrochimiques Accéder directement au contenu
Article Dans Une Revue Electrochimica Acta Année : 2011

Characterization of porous texture of cermet electrode for steam electrolysis at intermediate temperature

Résumé

Electrodes designed for PCEC (Proton Conducting Electrolyzing Cell) should ensure both electron and proton conductions and also allowed the supply or the draining of gaseous phase such as steam, hydrogen and oxygen. Porous cermet electrodes fulfil these requirements: percolated metallic phase for electron conduction, ceramic for proton conduction, and pores for transport of reactant and products in gas phase. The electrochemical reactions will take place at boundaries of these three phases, commonly named triple points. Therefore, the cermet electrode has to possess a sufficient open porosity and the expanded metallic surface area exposed to pores as large as possible. In this work, the pore texture of cermet electrodes was characterized by means of Electrochemical Impedance Spectroscopy in aprotic liquid medium. The parameter regression calculation based on de Levies transmission-line model allowed us to determine the pore texture characterized by expanded surface area, number, mean radius of pores, and open porosity.

Domaines

Chimie Autre

Dates et versions

hal-00822700 , version 1 (15-05-2013)

Identifiants

Citer

Claude Deslouis, Michel Keddam, Khamal Rahmouni, Hisasi Takenouti, F. Grasset, et al.. Characterization of porous texture of cermet electrode for steam electrolysis at intermediate temperature. Electrochimica Acta, 2011, 56 (23), pp.7890-7898. ⟨10.1016/j.electacta.2010.12.107⟩. ⟨hal-00822700⟩
44 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More