Introduction -- Experimental -- Results -- Summary and conclusions

    This work revolves around the hydrogen economy and energy-storage electrochemical systems. More specifically, it investigates the possibility of using magnetron sputtering for deposition of efficient thin-film anode catalysts with low noble metal content for proton exchange membrane water electrolyzers (PEM-WEs) and unitized regenerative fuel cells (PEM-URFCs). The motivation for this research derives from the urgent need to minimize the price of such electrochemical devices should they enter the mass production. Numerous experiments were carried out, correlating the actual in-cell performance with the varying position of thin-film catalyst within the membrane electrode assembly, with the composition of high-surface support sublayer and with the chemical structure of the catalyst itself. The wide arsenal of analytical methods ranging from electrochemical impedance spectroscopy through electrochemical atomic force microscopy to photoelectron spectroscopy allowed a description of the complex phenomena behind different obtained efficiencies. Systematic optimizations led to the design of a novel PEM-WE anode thin-film iridium catalyst which performs similarly to the standard counterparts despite using just a fraction of their noble metal content. Moreover, the layer-by-layer approach allowed the design of a Pt/TiC/Ir bi-functional anode for PEM-URFC which is able to operate in both the fuel cell and electrolyzer regime and thus helps to cut the cost of the whole conversion system even further


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    Title :

    Thin-Film catalysts for proton exchange membrane water electrolyzers and unitized regenerative fuel cells


    Contributors:


    Publication date :

    2019


    Size :

    1 Online-Ressource (XIV, 101 Seiten)


    Remarks:

    Campusweiter Zugriff (Universität Hannover) - Vervielfältigungen (z.B. Kopien, Downloads) sind nur von einzelnen Kapiteln oder Seiten und nur zum eigenen wissenschaftlichen Gebrauch erlaubt. Keine Weitergabe an Dritte. Kein systematisches Downloaden durch Robots.
    Erworben aus Studienqualitätsmitteln




    Type of media :

    Theses


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    530.417
    BKL:    33.68 Oberflächen, Dünne Schichten, Grenzflächen / 35.14 Elektrochemie / 35.17 Katalyse / 53.36 Energiedirektumwandler, elektrische Energiespeicher / 33.07 Spektroskopie



    A Novel Unitized Regenerative Proton Exchange Membrane Fuel Cell

    Murphy, O. J. / Cisar, A. J. / Gonzalez-Martin, A. et al. | British Library Conference Proceedings | 1996




    Hydrogen-oxygen proton-exchange membrane fuel cells and electrolyzers

    Baldwin, R. / Pham, M. / Leonida, A. et al. | Tema Archive | 1990


    Proton-exchange membrane regenerative fuel cells

    Swette, L.L. | Online Contents | 1994