Conflicts of Interest The authors declare no conflicts of interest. Supporting Information Filename Description xrs3480-sup-0001-supinfo.pdfapplication/vnd.openxmlformats-officedocument.pdfprocessingml.document, 660.3 KB Data S1 Supporting Information. References 1 NETL, “ Chapter 3 Polymer Electrolytic Fuel Cells,” in Seventh Edition Fuel Cell Handbook (Pittsburgh, PA: National Energy Technology Laboratory, 2004), 3.1–3.25, https://doi.org/10.2172/834188.