کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1292338 | 1497926 | 2016 | 6 صفحه PDF | دانلود رایگان |
• The PtRuCu6-A/C with an alloy core and surface Pt–Ru defects was synthesized.
• The PtRuCu6-A/C has higher mass and surface activity for methanol oxidation.
• The synthetic strategy is helpful for preparing highly active Pt-based catalysts.
Until now, Pt is commonly used as anode catalyst for methanol oxidation in direct methanol fuel cells. Here we report that chemical corrosion of PtRuCu6/C, which was prepared by microwave-polyol technique, promotes the activity of Pt for methanol oxidation. The PtRuCu6/C is chemically corroded, and the obtained sample is denoted as PtRuCu6-A/C. The PtRuCu6-A/C contains a Pt–Ru–Cu core and Pt–Ru shell with surface defects. The PtRuCu6-A/C has surface activity and mass activity 10.6 and 6.0 times higher than those of Pt/C for methanol oxidation. And the surface activity and mass activity of PtRuCu6-A/C are 3.3 and 3.9 times higher than those of PtRu/C for methanol oxidation. The enhanced activity of PtRuCu6-A/C is attributed to the surface defects and the stronger electronic modification of Pt. This facile preparation strategy provides a new route of synthesizing highly active catalysts for methanol oxidation.
The PtRuCu6-A/C contains a Pt–Ru–Cu core and Pt–Ru shell with surface defects. The PtRuCu6-A/C has superior catalytic activity than those of Pt/C and PtRu/C for methanol oxidation. The enhanced activity of PtRuCu6-A/C is attributed to the surface Pt–Ru defects and the stronger electronic modification of Pt. The preparation strategy provides a new route of synthesizing highly Pt-based active catalysts for methanol oxidation.Figure optionsDownload as PowerPoint slide
Journal: Journal of Power Sources - Volume 306, 29 February 2016, Pages 489–494