Fig. 4: Electrocatalytic performance of EOR and OER.

EOR performance: a CV curves (scan rate 50 mV s−1), b summarized If and If/Ib, and c chronoamperometry tests of commercial Pd/C, Au-Pd NPs, and various aerogel catalysts in 1.0 M KOH + 1.0 M ethanol solution. The inset of c shows the CV curves of Au-Pd-1 before and after a 3 h chronoamperometry test. OER performance: d LSV curves (scan rate 5 mV s−1), e Tafel plots, and f chronopotentiometric tests of commercial Ir/C, IrO2, Au aerogel, Au-Ir NPs, and Au-Ir aerogel in 1.0 M KOH aqueous solution.