Abstract
AbstractAs the support of Pt and Pt‐Ru catalysts for ethanol electrooxidation, the ethylenediamine (ED)‐grafted multiwalled carbon nanotubes (MWNT) were prepared by a chemical synthesis method and characterized by Fourier transform infrared spectroscopy. The morphology and elemental composition of the Pt‐Ru/ED/MWNT and Pt/ED/MWNT catalysts were characterized by transmission electron microscopy (TEM) and energy dispersive X‐ray spectroscopy. TEM results demonstrate that the ED‐grafted MWNT is beneficial to loading Pt‐Ru and Pt electrocatalysts with well dispersion and small particle sizes. On the other hand, the electrocatalytic properties of the Pt‐Ru/ED/MWNT and Pt/ED/MWNT catalysts were characterized by cyclic voltammetry and chronoamperometry. Under the same loading mass of catalyst, the electrocatalytic activities of both Pt‐Ru/MWNT/graphite and Pt/MWNT/graphite electrodes are enhanced obviously by the introduction of ED. The electrocatalytic activity of the Pt/ED/MWNT/graphite electrode is even higher than that of the Pt‐Ru/MWNT/graphite electrode. These results indicate that the ED/MWNT is a promising catalyst support for ethanol electrooxidation.
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