Synthesis and characterization of ultra-small octahedral PtNiCo skeletons with high activity for the oxygen reduction reaction

초록

Here, we report the synthesis of a ternary PtNiCo octahedral skeletal catalyst for the oxygen reduction reaction (ORR). A mixed flow of H2 and CO facilitated complete reduction, promoted Pt diffusion, and enabled the formation of octahedral PtNiCo nanoparticles (NPs). The resulting ternary skeletal catalyst, obtained after acid treatment, exhibited a mass activity (MA) of 1.64 A mgPt-1 and a specific activity (SA) of 3.73 mA cm-2, which are 7.5 and 14.3 times higher, respectively, than those of commercial Pt/C.

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