کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8078302 | 1521480 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of H2O2 treatment on electrochemical activity of mesoporous carbon-supported Pt-Ru catalysts
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of H2O2 treatment on electrochemical activity of mesoporous carbon-supported Pt-Ru catalysts Influence of H2O2 treatment on electrochemical activity of mesoporous carbon-supported Pt-Ru catalysts](/preview/png/8078302.png)
چکیده انگلیسی
In this report, we describe the preparation of OMC (ordered mesoporous carbon) via a conventional templating method using mesoporous silica (SBA-15) as a Pt-Ru catalyst support for use in fuel cells. The influence of surface treatment of the carbon supports on the electrochemical properties of Pt-Ru/OMC was investigated by exposing the surface to hydrogen peroxide at concentrations of 0, 15, 30, 40, and 50Â wt%. X-ray photoelectron spectroscopy (XPS) revealed that surface treatment changed the surface chemistry of the OMC samples considerably and introduced surface oxygen functional groups including C-O, CO, OC-O-H, and CO32â. The numbers of these functional groups increased with increasing concentration of H2O2 used in the surface treatment, while the average Pt-Ru nanoparticle size decreased owing to their improved dispersibility. Using CV (cyclic voltammetry), we determined that the electrochemical activity of the Pt-Ru catalyst increased with increasing H2O2 concentration used for surface treatment, up to 40Â wt%, due to the introduction of oxygen functional groups. Based on these results, we have established that surface treatment influences the surface properties of OMC materials, resulting in improved electrochemical activity of catalysts for fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 66, 1 March 2014, Pages 70-76
Journal: Energy - Volume 66, 1 March 2014, Pages 70-76
نویسندگان
Seul-Yi Lee, Byung-Ju Kim, Soo-Jin Park,