MXene-Supported Co–S–N–C Catalysts with Enhanced Oxygen Reduction Reaction Activity for Anion Exchange Membrane Fuel Cells

Anion exchange membrane fuel cells (AEMFCs) have emerged as a promising clean energy technology due to their high efficiency and the potential to eliminate the reliance on precious metal catalysts for the oxygen reduction reaction (ORR) at the cathode. Developing highly efficient nonprecious metal catalysts is crucial for enhancing AEMFC performance. In this study, we report a Co–S–N–C@MXene catalyst through sulfur doping and support loading. This catalyst demonstrates exceptional ORR activity, achieving a half-wave potential ( E 1/2 ) of 0.881 V. After 10,000 cycles of cyclic voltammetry (CV) testing, the E 1/2 showed a minimal decline of only 14 mV, demonstrating excellent durability. Moreover, the AEMFC based on the catalyst achieved a peak power density of 466 mW cm –2 .