کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6609181 | 459545 | 2016 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Poly (p-phenylendiamine/TiO2) nanocomposite promoted Pt/C catalyst for methanol and ethanol electrooxidation in alkaline medium
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
In the present study, poly (p-phenylendiamine/titanium dioxide) (PpPDA/TiO2) nanocomposites (NCs) were prepared by in situ polymerization of p-phenylenediamine monomer with of different TiO2 loading. A facile method was developed to promote the electrocatalytic activity of commercial Pt/C catalyst by ultrasonically mixing Pt/C catalyst and PpPDA/TiO2 NCs. The PpPDA/TiO2 NC, Pt/C catalyst and composite catalyst of Pt/CÂ +Â PpPDA/TiO2 were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The surface morphology of Pt/C is significantly influenced by the presence of PpPDA/TiO2 NC as confirmed by SEM observations. Cyclic voltammetry (CV) measurements showed that the PpPDA/TiO2 NC leads to a significant improvement in the activity and stability of Pt/C for alcohol oxidation especially for ethanol oxidation in alkaline medium. For Pt/CÂ +Â PpPDA/TiO2, the onset potentials shift to negative values by 30 and 160Â mV compared to the onset potentials of Pt/C for methanol and ethanol oxidation, respectively. Chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) results also confirmed that this composite catalyst has superior catalytic performance towards ethanol oxidation compared to the pure Pt/C catalyst.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 191, 10 February 2016, Pages 536-547
Journal: Electrochimica Acta - Volume 191, 10 February 2016, Pages 536-547
نویسندگان
Hussein Rostami, Abbas Ali Rostami, Abdollah Omrani,