Abstract

Herein, uniform Pt2.6Co1 nanoflowers (NFs) were synthesized in oleylamine by a one-pot solvothermal method, using cetyltrimethylammonium chloride (CTAC) and glucose as the capping agent and green reducing agent. The samples were mainly characterized by transmission electron microscopy (TEM), high angle annular dark-field scanning TEM (HAADF-STEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The architectures had larger electrochemically active surface area (ECSA) of 23.84m2g−1Pt than Pt1.2Co1 nanocrystals (NCs, 14.96m2g−1Pt), Pt3.7Co1 NCs (16.96m2g−1Pt) and commercial Pt black (20.35m2g−1Pt). And the as-obtained Pt2.6Co1 catalyst displayed superior catalytic performance and better durability for hydrogen evolution reaction (HER) as compared to Pt1.2Co1 NCs, Pt3.7Co1 NCs, commercial 50% Pt/C and Pt black catalysts in acid and alkaline media. Meanwhile, the electrocatalytic performance of Pt2.6Co1 NFs for oxygen reduction reaction (ORR) is better in acid media as compared with that in alkaline media. It indicates the great potential applications of the as-prepared catalyst in fuel cells.

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