Cobalt nickel boride nanocomposite as high-performance anode catalyst for direct borohydride fuel cell

Similar to MXene, MAB is a group of 2D ceramic/metallic boride materials which exhibits unique properties for various applications. However, these sheets tend stack and therefore lose their active surface area functions. Herein, an amorphous cobalt nickel (Co–Ni–B) nanocomposite prepared with combination nanoparticles in the center avoid agglomeration. This structure holds nano-sheets massive contains numerous catalytic sites. as electrocatalyst borohydride electrooxidation reaction (BOR). It shows outstanding activity through improving kinetic parameters BH4? oxidation, owing abundant ultrathin on surface, provide free interspace electroactive sites charge/mass transport. The anode catalyst led 209 mW/cm2 maximum power density high open circuit potential 1.06 V at room temperature miniature direct fuel cell (DBFC). also showed great longevity up 45 h output 64 mW/cm2, higher than Co–B, Ni–B PtRu/C. cost reduction prospective scale-up production Co–Ni–B are addressed.