کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6614750 | 459616 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
TiO2/C composite as a support for Pd-nanoparticles toward the electrocatalytic oxidation of methanol in alkaline media
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The electro-oxidation of methanol was studied in alkaline solution on Pd nanoparticles supported on carbon black (XC-72R, C) and TiO2/C composite. The materials were prepared via organic colloid route at 170 °C with 5 wt% of Pd. X-ray diffraction (XRD), PdO monolayer reduction (PdOred) and CO-stripping was employed to characterize both structure and electrochemical properties. According to this, the lattice parameter decreases from 0.3991 to 0.3905 nm due to a possible formation of Pd-Ti alloy. This modification is linked with the electrochemical active surface area (ECSA) decreasing from 22 to 18 m2 gâ1. On the other hand, studies as a function of temperature and alcohol concentration indicated that the current for methanol electro-oxidation is higher and more stable at Pd/TiO2-C, with Ea = 44.042 kJ molâ1. Then, it is highly possible that at Pd/TiO2-C, the OHâ/OHads couple is adsorbed at the TiO2 sites, increasing the kinetic of methanol oxidation reaction at the catalyst surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 112, 1 December 2013, Pages 164-170
Journal: Electrochimica Acta - Volume 112, 1 December 2013, Pages 164-170
نویسندگان
L.A. Estudillo-Wong, A.M. Vargas-Gómez, E.M. Arce-Estrada, A. Manzo-Robledo,