Figure 3
Scattering curves from Vulcan and Vulcan-supported catalysts. (a) Scattering curves from Vulcan (black) and TEC10V30E (red) in the absence of solvent. The curve from TEC10V30E exhibits a prominent shoulder-like feature at around q = 1.0 nm−1 (arrow), originating from Pt particles. The two curves are normalized to coincide at the low-q end. The inset shows the distribution of Pt particle size, obtained by McSAS. The red curve represents the fit to a Gaussian function. (b) Scattering curve from TEC10V30E dispersed in 50% TBE after subtracting the scattering from the solvent alone. The shoulder-like feature remains as prominent as in (a), and the Pt particle size as determined by McSAS is not different from that in the absence of the solvent. (c) Scattering from a mixture of TEC10V30E and Vulcan (TEC = 6% by weight) in the absence of solvent. The shoulder-like feature is barely recognized, and cannot be reliably analyzed by McSAS. (d) Scattering from a mixture of TEC10V30E and Vulcan (TEC = 5% by weight) dispersed in 50% TBE. The shoulder-like feature is clearly observed, and is analyzable by McSAS.
