Figure 5: CPE data for PtAu24 in homogeneous and heterogeneous conditions.
From: A molecule-like PtAu24(SC6H13)18 nanocluster as an electrocatalyst for hydrogen production
(a) Average current densities (red circles) and TOFs (blue circles) obtained at various overpotentials after 15 min homogeneous CPE in THF (0.5 M Bu4NPF6) containing 1.0 TFA with a glassy carbon plate (1 cm2) in the presence of PtAu24 (2.5 μM). (b) Average current densities (red circles) and TOFs (blue circles) obtained at various overpotentials after 60 min heterogeneous CPE in 1.0 M Brinton–Robinson buffer solution (pH 3) on a PtAu24/C/GDL electrode (1 cm2). Average current densities obtained on a blank C/GDL (black circles) are shown for comparison. SWVs of PtAu24 shown in the upper part of the graphs show the charge state of PtAu24 at each overpotential. (c) H2 production rates per mass of metals in the catalyst ((mol H2) g−1 h−1) at various overpotentials on a PtAu24/C/GDL (blue circles) and a Pt/C/GDL (black triangles) electrodes (1 cm2).
