Corresponding Author

Jun-liang ZHANG(junliang.zhang@sjtu.edu.cn)


Structures and compositions have significant effects on the catalytic properties of nanomaterials. Herein, a facile etching-based method was employed to synthesize Pt-Cu nanodendrites (NDs) with uniform and homogeneous alloy structures for enhancing oxygen reduction reaction (ORR). The formation of dendritic morphology was ascribed to the etching effect caused by the oxidative etchants of the Br-/O2 pair. The atomic ratio of Pt/Cu in Pt-Cu NDs could be easily tuned by altering the ratio of the Pt/Cu precursors, without deteriorating the dendritic morphology. The most active carbon-supported Pt1Cu1 NDs (Pt1Cu1 NDs/C) exhibited the area-specific activity of 1.17 mA·cm-2@0.9 V (vs. RHE), which is ~5.32 times relative to that of commercial Pt/C. Moreover, Pt1Cu1 NDs/C also possessed a remarkable electrochemical durability, preserving its superior ORR catalytic activity even after 12000 potential cycles during the accelerated degradation test. Such excellent catalytic activity and electrochemical durability of Pt1Cu1 NDs/C toward ORR were resulted from the combined electronic and structural effects, which are imparted by the Pt-Cu alloy structure and the dendritic morphology.

Graphical Abstract


Pt, alloy, electrocatalysts, nanodendrites, oxygen reduction reaction

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