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

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Abstract

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 1 s. 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.

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Acknowledgement

Financial support from the Fonds National Suisse de la Recherche Scientifique is gratefully acknowledged.

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Correspondence to Cyril Falgairette.

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Falgairette, C., Xia, C., Li, Y. et al. Solid electrochemical mass spectrometry (SEMS) for investigation of supported metal catalysts under high vacuum. J Appl Electrochem 40, 1893–1900 (2010). https://doi.org/10.1007/s10800-010-0159-x

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  • DOI: https://doi.org/10.1007/s10800-010-0159-x

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