Fig. 6: Performance evaluation of the PtFe@FeSAs-N-C cathode in the fuel cell.
From: Spin occupancy regulation of the Pt d-orbital for a robust low-Pt catalyst towards oxygen reduction
a The structural components of a single PEMFC. b H2/O2 and c H2-air fuel cell polarization (left axis) and power density (right axis) plots with loadings of 0.2 mgPt cm−2 for Pt/C, 0.12 mgPt cm−2 for PtFe@FeSAs-N-C, and 4 mg cm−2 catalyst loading for FeSAs-N-C in the cathode under H2/O2 flow at 80 °C, 28 psi. d H2/O2 fuel cell polarization (left axis) and power density (right axis) plots of the PtFe@FeSAs-N-C cathode before (BOT) and after 30,000 potential cycles between 0.6 and 0.95 V. e Mass activity (MA), MA test under H2/O2 flow at 80 °C, 28 psi. f Current density retention as a function of time for PtFe@FeSAs-N-C (0.12 mgPt cm−2) and Pt/C (0.2 mgPt cm−2) at a constant potential of 0.6 V under H2/O2 flow at 80 °C, 0 psi. g Comparison of MA retention after square wave accelerated durability testing between PtFe@FeSAs-N-C with the state-of-art in the literature.
