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- W2893502804 abstract "The convenient formation of clean/pure platinum (Pt)-based nanocatalysts without the aid of any organic additives is particularly favorable for the oxygen reduction reaction. Based on ultraviolet (UV) laser-assisted reduction of PtCl42− and PdCl42− ions in ethanol/distilled water, we report a one-step synthesis of PtPd nanoalloys without any residual contamination on the surfaces. During UV laser irradiation, the hydroxyl (-OH) groups generated by photo-excitation of ethanol molecules can be served as a moderate reducing agent, giving rise to the controllable reduction of metallic ions. The controlled formations of polygonal Pt1Pd3 (Pt/Pd atomic ratio: 1:3), dendritic Pt1Pd1 and meatball-shaped Pt3Pd1 nanoalloys are solely linked to the feed amount of metallic ions. The electrocatalytic tests confirmed that the obtained dendritic Pt1Pd1 nanocatalysts provide optimized catalytic activity, enhanced antipoisoning capability and pronounced durability toward methanol oxidation reaction (MOR). Especially, the electrochemically active surface area (ECSA) is about 450.1 cm−2/mg, while that of polygonal Pt1Pd3, meatball-shaped Pt3Pd1 nanoalloys and commercial Pt/C catalysts are 80.3, 209.6 and 106.6 cm−2/mg, respectively. Moreover, the mass-normalized (mass of Pt) activity of Pt1Pd1 nanoalloys is 362 mA/mg, which is about 1.78, 5.1 and even 3.4 times higher than the above referenced catalysts, respectively. The present work will initiate new opportunities for the exploration of advanced nanocatalysts toward fuel cells applications." @default.
- W2893502804 created "2018-10-05" @default.
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- W2893502804 date "2019-01-01" @default.
- W2893502804 modified "2023-10-11" @default.
- W2893502804 title "Ultraviolet laser beam-assisted one-step synthesis of clean PtPd nanoarchitectures with excellent electrocatalytic properties for direct methanol fuel cells" @default.
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- W2893502804 doi "https://doi.org/10.1016/j.matchemphys.2018.09.073" @default.
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