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Solid electrochemical mass spectrometry (SEMS) for investigation of supported metal catalysts under high vacuum

Falgairette, Cyril ; Xia, Chun ; Li, YongDan ; Harbich, Wolfgang ; Comninellis, Christos

In: Journal of Applied Electrochemistry, 2010, vol. 40, no. 10, p. 1893-1900

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    Titre
    • Solid electrochemical mass spectrometry (SEMS) for investigation of supported metal catalysts under high vacuum
    Auteur
    • Falgairette, Cyril. Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
    • Xia, Chun. Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
    • Li, YongDan. Tianjin Key Laboratory of Applied Catalysis Science and Technology and State Key Laboratory for Chemical Engineering, School of Chemical Engineering, Tianjin University, 300072, Tianjin, China
    • Harbich, Wolfgang. Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
    • Comninellis, Christos. Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Journal of Applied Electrochemistry, 2010, vol. 40, no. 10, p. 1893-1900. Springer Netherlands
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:309583
    Summary
    A new experimental set-up, coupling electrochemistry and mass spectroscopic techniques, for the investigation of a solid electrochemical cell under high vacuum conditions (HV) is presented. Two configurations are realized allowing the investigation of both the electrochemical and electrocatalytical behavior of a thin Pt layer on yttria stabilized zirconia (YSZ). We can readily select the atmosphere down to 10−6 Pa partial pressure and determine the response of the system in less than 1s. Under HV conditions, YSZ appears electrochemically active and we have identified, in the cathodic potential domain, the reduction/oxidation process of zirconia and in the anodic domain, the platinum oxidation/reduction and the oxygen evolution reactions. In a catalytic active gas mixture, despite the Faradaic enhancement of the CO oxidation observed over Pt/YSZ during an anodic polarization, an intriguing sustainable enhanced Pt/YSZ catalyst activity is achieved after current interruption