Fig. 4: HEMFC performance and durability. | Nature Communications

Fig. 4: HEMFC performance and durability.

From: Tuning the apparent hydrogen binding energy to achieve high-performance Ni-based hydrogen oxidation reaction catalyst

Fig. 4

a H2-O2 HEMFC polarization and power density curves with Ni/C, NiCu/C, NiCr/C, or NiCuCr/C anode. The anode catalyst loading was 9 mgM cm−2, and the cathode catalyst loading was 0.2 mgPt cm−2 using commercial 40% Pt/C. The anode humidifier temperature, cathode humidifier temperature, and cell temperature were 78, 80, and 80 °C, respectively. The back pressure was 2.0 bar, and the flow rates of H2 and O2 were both 1000 sccm. b Summary of the peak power density and durability of the reported PGM-free anode MEA, details are listed in Supplementary Table 3. c H2-O2 HEMFC stability test curves of NiCuCr/C and Ni/C at 0.7 V, the test condition was the same as polarization test except for the flow rate of H2 and O2 were both 500 sccm. d H2-O2 HEMFC polarization and power density curves of the MEA using NiCuCr/C anode and Ag/C cathode. The anode catalyst loading was 9 mgM cm−2, and the cathode catalyst loading was 0.6 mgAg cm−2 using commercial 20% Ag/C. e Summary of the peak power density of reported totally PGM-free MEA; details are listed in Supplementary Table 4.

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