Fig. 2: Hydrogen oxidation reaction (HOR) activity tested by the RDE method. | Nature Communications

Fig. 2: Hydrogen oxidation reaction (HOR) activity tested by the RDE method.

From: A highly-active, stable and low-cost platinum-free anode catalyst based on RuNi for hydroxide exchange membrane fuel cells

Fig. 2

a HOR polarization curves of Ru/C, Ni/C, Pt/C, PtRu/C, and Ru7Ni3/C in H2-saturated 0.1 M KOH solution. Scan rate: 1 mV s−1; rotation rate: 1600 rpm. All of the catalysts with a loading of 3.9 µgPGM cm−2, except 3.9 µgNi cm−2 for Ni/C. b Polarization curves of Ru7Ni3/C in H2-saturated 0.1 M KOH at a scan rate of 1 mV s−1 at different rotation rates. Inset shows the Koutecky–Levich plot of Ru7Ni3/C at an overpotential of 100 mV. c Electrochemical surface area (ECSA) normalized specific activity and precious metal (Ru or Pt)-based mass activity at 50 mV of the Ru/C, Pt/C, PtRu/C, and Ru7Ni3/C.

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