کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7709378 | 1497331 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
PtCu catalyst for the electro-oxidation of ethanol in an alkaline direct alcohol fuel cell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A PtCu electrocatalyst was synthesized using a galvanic displacement route obtaining nanoparticles with a semi-spherical morphology and an average size of 4Â nm, supported on carbon black (Vulcan). The crystallographic characterization by X-ray diffraction showed a certain degree of PtCu alloying. The electrocatalytic activity of the prepared electrocatalyst for the electro-oxidation of ethanol in alkaline media was investigated. A 2-fold increase of the peak current density and a negative shift of the potential were recorded in half-cell experiments for the bimetallic catalyst compared to a commercial Pt/C. The presence of Cu promotes ethanol oxidation in alkaline electrolyte by hindering the PtH adsorption at low overpotentials. Additionally, the PtCu electrocatalyst was used as anode in an anion-exchange-membrane direct ethanol fuel cell (AEM-DEFC) exhibiting about 2-fold higher power density than the benchmark Pt/C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 46, 16 November 2017, Pages 27919-27928
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 46, 16 November 2017, Pages 27919-27928
نویسندگان
J. Maya-Cornejo, R. Carrera-Cerritos, D. Sebastián, J. Ledesma-GarcÃa, L.G. Arriaga, A.S. Aricò, V. Baglio,