Abstract
Ru-doped SnO 2 nanoparticles were prepared by chemical precipitation and calcinations at 823 K. Due to high stability in diluted acidic solution, Ru-doped SnO 2 nanoparticles were selected as the catalyst support and second catalyst for methanol electrooxidation. The micrograph, elemental composition, and structure of the Ru-doped SnO 2 nanoparticles were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction, respectively. The electrocatalytic properties of the Ru-doped SnO 2-supported Pt catalyst (Pt/Ru-doped SnO 2) for methanol oxidation have been investigated by cyclic voltammetry. Under the same loading mass of Pt, the Pt/Ru-doped SnO 2 catalyst shows better electrocatalytic performance than the Pt/SnO 2 catalyst and the best atomic ratio of Ru to Sn in Ru-doped SnO 2 is 1/75. Additionally, the Pt/Ru-doped SnO 2 catalyst possesses good long-term cycle stability.
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