Catalytic Layer Optimization for Hydrogen Permeation Membranes Based on La 5.5 WO 11.25-δ /La 0.87 Sr 0.13 CrO 3-δ Composites

(LWO/LSC) composite is one of the most promising mixed ionic-electronic conducting materials for hydrogen separation at high temperature. However, these materials present limited catalytic surface activity toward H activation and water splitting, which determines the overall H separation rate. For t...

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Bibliographic Details
Published inACS applied materials & interfaces Vol. 9; no. 41; pp. 35749 - 35756
Main Authors Escolástico, Sonia, Solı S, Cecilia, Kjølseth, Christian, Serra, Jose Manuel
Format Journal Article
LanguageEnglish
Published United States 18.10.2017
Subjects
metallic layers
proton conductor
catalytic layer
hydrogen permeation
sputtering
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Summary:(LWO/LSC) composite is one of the most promising mixed ionic-electronic conducting materials for hydrogen separation at high temperature. However, these materials present limited catalytic surface activity toward H activation and water splitting, which determines the overall H separation rate. For the implementation of these materials as catalytic membrane reactors, effective catalytic layers have to be developed that are compatible and stable under the reaction conditions. This contribution presents the development of catalytic layers based on sputtered metals (Cu and Pd), electrochemical characterization by impendace spectroscopy, and the study of the H flow obtained by coating them on 60/40-LWO/LSC membranes. Stability of the catalytic layers is also evaluated under H permeation conditions and CH -containing atmospheres.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.7b08995