Grazing-incident neutron scattering to access catalyst for polymer electrolyte fuel cell

Ueda, Satoru; Ohira, Akihiro; Koizumi, Satoshi; Kuroda, Seiichi; Frielinghaus, Henrich

doi:10.1016/j.physb.2017.12.061

Journal Article

FZJ-2018-00699

Grazing-incident neutron scattering to access catalyst for polymer electrolyte fuel cell

Ueda, S. ; Koizumi, S. (Corresponding author) ; Ohira, A. ; Kuroda, S. ; Frielinghaus, H.FZJ*

2018
Elsevier Amsterdam

Physica / B 551, 309-314 (2018) [10.1016/j.physb.2017.12.061]

This record in other databases:

Please use a persistent id in citations: doi:10.1016/j.physb.2017.12.061

Abstract: To observe details of three phase contact in a fuel cell catalyst layer and water distribution, we performed grazing incidence small-angle neutron scattering (GISANS) and neutron reflectivity (NR). We prepared a model catalyst on silicon(Si) substrates on which platinum(Pt) and Nafion thin layers are stacked. We employed two machines(KWS-1 and iMATERIA, respectively), which are monochromatic at FRM-II Germany and time-of-flight at J-PARC Japan. In case of Pt flat surface, which was prepared by sputtering, the influence due to humidification was observed in the vertical direction; a water layer could be confirmed between the Pt layer and the Nafion layer,increase in the thickness of the Nafion layer and increase in the water content of Nafion thin layer could be confirmed. The horizontal direction, on the other hand, water channels (microphase separation of Nafion) could not be observed in the core of thin Nafion layer. We also prepared the specimen, first Pt nano-particles areimplanted in a surface of Si substrate and second Nafion thin layer covers by spin coating.

Keyword(s): Energy (1st) ; Soft Condensed Matter (2nd) ; Materials Science (2nd)

Classification: