Fluorination-enabled interface of PtNi electrocatalysts for high-performance high-temperature proton exchange membrane fuel cells

High-temperature proton exchange membrane fuel cells (HT-PEMFCs) bring new opportunities for portable power generation due to their outstanding advantages such as high tolerance fuel/air impurities and simplified heat/water management. However, carbon-supported nanostructured Pt-based catalysts running at temperatures over 150°C are challenged by the severe aggregation carbon corrosion, thus leading poor durability. Herein, we demonstrate that dendritic Pt-Ni nanoparticles supported on fluorinated black (white black) could significantly enhance performance durability of HT-PEMFCs cathode 160°C strong interaction F Ni atoms form a NixFy interface nanoparticles. With formation stable interface, this integrated HT-PEMFC reached peak densities 906 mW cm−2 demonstrated excellent under anhydrous H2/O2 conditions. This mitigation strategy was applied Pt-alloy/C electrocatalysts resulted in elimination Pt dissolution practical cells.