کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
183446 459547 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced activity and durability of platinum anode catalyst by the modification of cobalt phosphide for direct methanol fuel cells
ترجمه فارسی عنوان
فعالیت پیشرفته و دوام کاتالیزور آنزیم پلاتین با اصلاح فسفید کبالت برای سلول های سوخت مستقیم متانول
کلمات کلیدی
سلول های سوخت مستقیم متانول، اکسیداسیون متانول، کاتالیزور آنود، کاتالیست بر پایه پلاتین، ثبات
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Pt-cobalt phosphide catalyst supported on carbon nanotubes (Pt/CoP/CNTs) is designed.
• Pt/CoP/CNTs exhibit high activity and stability for methanol oxidation reaction(MOR).
• The effect of CoP content on electrocatalytic performances for MOR is studied.
• CoP decreases the Pt particle size and increases the electrochemical surface areas.
• The interaction between Pt and CoP is evidenced by X-ray photoelectron spectroscopy.

In this study, carbon nanotubes (CNTs) supported Pt-cobalt phosphide (CoP) electrocatalyst (Pt/CoP/CNTs) is designed and prepared for methanol oxidation (MOR) for the first time. The modification of CoP decreases the Pt particle size significantly and increases the electrochemical surface areas due to the interaction between Pt and CoP, which is evidenced by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Among all these catalysts, Pt/4%CoP/CNTs catalyst exhibits the best MOR activity of 1600 mA mg−1Pt, which is six times that of Pt/CNTs. Moreover, this catalyst also exhibits the higher onset current density and steady current density than the other Pt-based catalysts. The work provides a promising method to develop the highly active and stable Pt-based catalyst for direct methanol fuel cells.

A novel Pt/CoP/CNTs electrocatalyst with has been designed and prepared, which exhibits high activity and stability for methanol oxidation reaction.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 185, 10 December 2015, Pages 178–183
نویسندگان
, , , , , ,