Fig. 3: Hydroxide exchange membrane fuel cells (HEMFCs) performance and durability. | Nature Communications

Fig. 3: Hydroxide exchange membrane fuel cells (HEMFCs) performance and durability.

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

Fig. 3

a Polarization and power density curves of H2/O2 and H2/air (CO2-free) HEMFCs with Ru7Ni3/C (0.2 mgRu cm−2) or PtRu/C (0.2 mgPtRu cm−2) in anode and Pt/C (0.4 mgPt cm−2) in cathode. Test conditions: cell temperature at 95 °C, anode humidifier temperature at 88 °C and cathode humidifier temperature at 97 °C, H2 flow rate at 1.0 L min−1 and O2/CO2-free air flow rate at 2.0 L min−1, backpressures were symmetric at 250 kPag. b H2/CO2-free air HEMFCs durability test at a constant current density of 0.5 A cm−2 with Ru7Ni3/C (0.1 mgRu cm−2) in anode and Pt/C (0.4 mgPt cm−2) in cathode. Test conditions: cell temperature at 80 °C, anode humidifier temperature at 79 °C and cathode humidifier temperature at 80 °C, H2 flow rate at 0.5 L min−1 and CO2-free air flow rate at 0.5 L min−1, backpressures were symmetric at 150 kPag. c, d The summary of the reported H2/O2 and H2/air (CO2-free) HEMFC performances using different anode catalysts measured in this paper and the Pt-free catalysts in the reported literature, respectively.

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