Fig. 3: Alkaline HER.
From: Diversity of platinum-sites at platinum/fullerene interface accelerates alkaline hydrogen evolution
a LSV (linear sweep voltammetry) of Pt catalysts with the loading of 0.4 mg cm−2 and bare C60. b Overpotentials of the catalysts at current densities of 10, 50, 150 mA cm−2 in (a). c LSV of the catalysts with very low catalyst loading of 0.004 mg cm−2 for assessing the intrinsic activities. Inset: geometric current density of the samples at an overpotential of 200 mV. d TOFs of the catalysts with the catalyst loading of 0.004 mg cm−2. e Corresponding Tafel plots obtained from LSV in (c). f EIS Nyquist plots of the catalysts at −40 mV vs. RHE. Inset (top): the equivalent circuit used for the EIS fitting. Inset (right): comparison of the fitted RCT. (Sample size n = 3 for (a–d) error bars correspond to the standard deviation of three independent measurements).
