Abstract
The film formation process of blade-coated catalyst ink was investigated by in-situ time-resolved grazing-incidence small-angle X-ray scattering (GISAXS) measurements utilizing synchrotron radiation. The GISAXS profiles were measured as a function of the time elapsed after coating the ink, t. As increasing t, the peak at around q z ~ 0.2 nm−1 shifted toward smaller q z. At t ~ 50 s, two peaks appeared at around q z ~ 0.5 nm−1 and then combined into one peak. These peak shifts would be ascribed to Pt/C agglomeration induced by solvent evaporation.
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