Figure 5: Electrocatalytic activity for ORR. | Nature Communications

Figure 5: Electrocatalytic activity for ORR.

From: Spontaneous incorporation of gold in palladium-based ternary nanoparticles makes durable electrocatalysts for oxygen reduction reaction

Figure 5

(a) Comparison of ORR polarization curves for Pd/C, Pd3Co/C, Pd3Cu/C and Pd6CoCu/C in O2-saturated 0.1 M HClO4 at room temperature; rotation rate, 1,600 r.p.m.; and sweep rate, 5 mV s−1. (b) ORR polarization curves for Pd6CoCu/C before and after 1,000 potential cycles in N2-saturated 0.1 M HClO4, rotation rate, 1,600 r.p.m. and sweep rate, 5 mV s−1. The inset in b shows the changes in the CV profiles after different numbers of cycles at a sweep rate of 50 mV s−1. (c) CV changes in the voltammetric profile for Pd6CoCu/C before and after 1,000 potential cycles in O2-saturated 0.1 M HClO4 between 0.6 and 1.0 V at a sweep rate of 50 mV s−1. (d) ORR polarization curves for Pd6CoCu/C before and after 1,000 potential cycles in O2-saturated 0.1 M HClO4, rotation rate, 1,600 r.p.m.; sweep rate, 5 mV s−1.

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