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|Title:||Investigation on the role of hydrous ruthenium oxide in PtRu/C catalyst for methanol electrooxidation|
|Keywords:||Catalysts;Direct methanol fuel cell PtRu/C electrocatalysts;Annealing treatment;Anode catalyst;Electrooxidation;Methanol electrooxidation|
|Abstract:||PtRu/Vulcan XC-72 catalyst with high catalytic performance has been synthesized by microwave-assisted polyol process, heat-treated, and characterized by X-ray diffraction, X-ray photoelectron spectra, transmission electron microscopy, thermogravimetric analysis, and differential scanning calorimetry. Their electrochemical performance has been tested by cyclic voltammetry, chronoamperometry curves, and CO-stripping techniques. The effect of annealing treatment on performance of the PtRu/C catalyst has been investigated. The results show that prior to the annealing treatment the as-prepared PtRu/C catalyst has a small particle size and has a relatively high amount of Pt and Ru in their metallic state, along with some amount of hydrous ruthenium oxides (RuOxHy), all of which contribute to the higher activity of catalyst. On the other hand, the anhydrous ruthenium oxide, which exist after the catalyst is annealed at 300 °C for 1 h, is found to be less active for methanol electrooxidation.|
|Appears in Collections:||IJC-A Vol.55A(09) [September 2016]|
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