Fig. 3: Electrocatalytic performance of Ru–GaSA/N–C and control catalysts for HER at room temperature in 1 M KOH solution (pH is 13.8 ± 0.1). | Nature Communications

Fig. 3: Electrocatalytic performance of Ru–GaSA/N–C and control catalysts for HER at room temperature in 1 M KOH solution (pH is 13.8 ± 0.1).

From: Oxophilic gallium single atoms bridged ruthenium clusters for practical anion-exchange membrane electrolyzer

Fig. 3

a iR-corrected polarization curves (R was 5.7 ± 0.1 Ω) tested by rotating disk electrode (RDE) at a scan rate of 5 mV s−1 under a rotating rate of 1600 rpm (noble metal loading was about 12 μg cm−2). b Mass activities of Ru–GaSA/N–C, Ru/N–C, and PtRu/C catalysts normalized to Ru mass at an overpotential of 50 mV. c iR-corrected polarization curves of Ru–GaSA/N–C, Ru/N–C, PtRu/C, and Pt/C before and after 10,000 cycling tests by RDE. d Chronopotentiometry tests of Ru–GaSA/N–C, Ru/N–C, PtRu/C, and Pt/C coated on carbon paper at 10 mA cm−2. e iR-corrected polarization curves (R was 1.7 ± 0.1 Ω) of Ru–GaSA/N–C, Ru/N–C, PtRu/C, and Pt/C catalysts coated on carbon paper (noble metal loading was about 40 μg cm−2). f Stability test of Ru–GaSA/N–C coated on carbon paper at 1 A cm−2 for 100 h.

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