High pressure gas-liquid mixtures generated in a micro-electrolysis cell

Sebastian Böhm, Heiko van der Linden, Albert van den Berg, Wouter Olthuis, Piet Bergveld

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    In this work a micro-electrolysis cell is presented that allows the rapid generation of high pressure gas-liquid mixtures. The stainless steel electrolysis cell (150 µl volume) is constructed as an integral part of an automotive pressure sensor, allowing the on-line monitoring of the generated pressure. By the application of an electric current between two platinum electrodes inserted in the electrolyte filled cell, hydrogen and oxygen gas was generated with pressures up to 1350 bar. First experiments were performed to investigate the catalytic back-reaction of the generated hydrogen/oxygen mixture at the surface of the platinum electrodes. By the application of a compensation current to keep the internal pressure at a constant value, the rate of the back reaction could be established. It follows that the catalytic back-reaction rate increases exponentially above a pressure of 800 bar. As the proposed method of in-situ high pressure gas generation is intrinsically fast and safe due to the small cell volume, a large number of these cells/reactors can form a platform for (chemical) high throughput experimentation (HTE).
    Original languageEnglish
    Title of host publicationMicro Total Analysis Systems 2000
    Subtitle of host publicationProceedings of the µTAS 2000 Symposium, held in Enschede, The Netherlands, 14–18 May 2000
    EditorsAlbert van den Berg, Wouter Olthuis, Piet Bergveld
    Place of PublicationEnschede
    PublisherKluwer Academic Publishers
    Pages611-614
    Number of pages4
    ISBN (Electronic)978-94-017-2264-3
    ISBN (Print)978-0-7923-6387-3, 978-90-481-5496-8
    DOIs
    Publication statusPublished - 14 May 2000
    Event4th International Conference on Micro Total Analysis Systems, µTAS 2000 - Enschede, Netherlands
    Duration: 14 May 200018 May 2000
    Conference number: 4

    Conference

    Conference4th International Conference on Micro Total Analysis Systems, µTAS 2000
    Abbreviated titleMicroTAS
    Country/TerritoryNetherlands
    CityEnschede
    Period14/05/0018/05/00

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