کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6613836 | 459615 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Platinum deposited on TiO2-C and SnO2-C composites for methanol oxidation and oxygen reduction
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Electrocatalytic activities and stabilities of Pt supported on SnO2-carbon and TiO2-carbon as electrocatalysts were examined for methanol oxidation and oxygen reduction reactions. The Pt/oxide-C catalysts were synthesized by photo-deposition method at RT. The samples prepared were characterized by X-ray diffraction, TEM analysis, cyclic and lineal voltammetry, CO stripping and chronoamperometry techniques. Electrochemical activities of Pt/oxide-C for methanol oxidation reaction (MOR) and methanol tolerance for oxygen reduction were compared with those of Pt/C (Pt-Etek). The MOR activity of Pt/SnO2-C was enhanced over those of the Pt/TiO2-C and Pt/C at different concentrations due to the small platinum particles size. Pt-Sn interaction produce changes in the platinum electronic properties that improve the electrochemical activity towards the methanol oxidation and stability to the methanol presence. The SnO2-C composite appear to be a promising support material that promote electrochemical reactions and stabilize catalytic particles in direct alcohol fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 120, 20 February 2014, Pages 344-349
Journal: Electrochimica Acta - Volume 120, 20 February 2014, Pages 344-349
نویسندگان
B. Ruiz-Camacho, H.H. RodrÃguez Santoyo, J.M. Medina-Flores, O. Álvarez-MartÃnez,