Interestingly, the sample obtained using methanol as source of the reducing agents, F, show a size about twice the size of the sample B, 22 and 10 nm, respectively. However, F shows ECSA and MA comparable to B. Although this observation is not fully understood at this stage, this could come from different surface properties of the Au NPs obtained using methanol vs. ethanol, where methanol is a potentially cleaner solvent less prone to side reactions in alkaline conditions . This results suggest that a finer size control of methanol-mediated syntheses of SF Au NPs could lead to even more active catalysts.