کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10269052 | 459718 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of core-shell structured catalysts using PtxPdy as active shell and nano-sized Ru as core for potential direct formic acid fuel cell application
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Carbon-supported core-shell structured Ru@PtxPdy/C catalysts with PtxPdy as shell and nano-sized Ru as core are prepared by a successive reduction procedure. The catalysts are extensively characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The formic acid oxidation activity of Ru@PtxPdy/C varies with the varying Pt:Pd atomic ratio. The peak oxidation potential on Ru@Pt1Pd2/C shifts negatively for about 200Â mV compared with that of Pd/C. The higher electro-catalytic activity toward formic acid oxidation on core-shell structured Ru@PtxPdy/C catalyst than that on PtxPdy/C suggests the high utilization of noble metals. In addition to the enhanced noble metal utilization, Ru@PtxPdy/C catalyst also shows improved stability as evidenced by chronoamperometric evaluations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2024-2030
Journal: Electrochimica Acta - Volume 56, Issue 5, 1 February 2011, Pages 2024-2030
نویسندگان
Haili Gao, Shijun Liao, Jianhuang Zeng, Yichun Xie, Dai Dang,