Dual Anchoring Effect Achieves Active and Ultrastable Oxygen Reduction Catalysis

ABSTRACT

Suppressing the dissolution of transition metals in multi‐component platinum (Pt)‐based oxygen reduction reaction (ORR) catalysts is critical yet challenging for proton exchange membrane fuel cell (PEMFC). Herein, we employ a dual anchoring strategy of rare earth (RE) surface stabilization and metal‐nitrogen‐carbon (MNC) interaction with porous Pt‐nickel‐cobalt nanowires (PtNiCo PNWs) to achieve satisfactory ORR and membrane electrode assembly (MEA) performances. The single site and cluster of praseodymium (Pr) tune the Pt electronic structure and protect the Ni/Co sites from dissolution, while zinc‐N‐C (ZnNC) provides extra active sites and stronger anchoring effect, yielding 9.0/9.5 times higher than those of commercial Pt/C in ORR mass and specific activities. Furthermore, the MEA exhibits high peak power density of 2.33 W cm ⁻² , mass activity of 0.79 A mg _Pt ⁻¹ at 0.9 V _iR‐free and long‐term lifetime of operating 30000/90000 cycles with 8.2%/28.3% decay, further reflecting our reasonable design conception of Pt‐based ORR catalysts for PEMFC device.