Figure 6.

a) AEMFC performance based on PDTP‐25 membrane (22±3 μm) and different A/C AEIs. Testing conditions: 0.39 mg cm⁻² Pt‐Ru/C in the anode along with additional carbon powder (the ratio of AEIs: total carbon: Pt‐Ru is 1:2.33:2), 0.26 mg cm⁻² Hispec Pt/C in the cathode (the ratio of AEIs: total carbon: metal is 1:2:1.33), 1000/1000 mL min⁻¹ H₂‐O₂ flow rate, 1000/2000 mL min⁻¹ H₂‐air (CO₂ free) flow rate, 1.3/1.3 bar back pressure. b) comparison of specific power and PPDs of present AEMFCs and current AEMFCs with A/C PGM catalysts. The specific power of reported AEMFCs with PGM‐free cathode was plotted for comparison. Red pentagon symbols denote the present work based on PDTP‐x and PFBP AEPs, red star symbols are commercial Fumion ionomer in this work, blue triangle symbols are PNB AEMs,[ ¹⁵ , ²⁸ , ²⁹ ] yellow hexagon symbols are polyethylene‐based AEMs,[ ¹³ , ¹⁴ ] violet pentagon symbols are polyphenylene and PAP AEMs,[ ³⁴ , ³⁵ , ³⁶ , ³⁷ , ⁴³ , ⁴⁹ ] black triangle symbols are other AEMs, including PPO, PSF, PBI, SEBS,[ ¹³ , ¹⁴ , ¹⁵ , ¹⁶ , ¹⁷ , ¹⁸ , ¹⁹ , ²⁰ ] and blue star symbols are AEMFCs based on PGM‐free cathode.[ ⁶ , ¹¹ , ⁵² , ⁵³ ]