Fig. 4 | Nature Communications

Fig. 4

From: Octahedral gold-silver nanoframes with rich crystalline defects for efficient methanol oxidation manifesting a CO-promoting effect

Fig. 4

Electrocatalytic performances of Au–Ag nanostructures. a Cyclic Voltammetry (CV) curves taken at a sweep rate of 20 mV s−1 for all examined catalysts. b The corresponding histogram of mass and specific activities. c CVs of Au3Ag NFs taken at various scan rates. The inset shows a linear response of current density with respect to the square root of scan rates. d Chronoamperometric i–t curves of all examined catalysts up to 20 h. e Evolution of CV curves for Au3Ag NFs with the CO supply turned on and off for a continuous 10 cycles. f Evolution of CV curves for Pt/C with the CO supply turned on and off for a continuous 10 cycles. The methanol oxidation reactions were performed in deoxygenated solutions of 2 M CH3OH and 0.5 M KOH

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