کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
186752 459621 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A solvent approach to the size-controllable synthesis of ultrafine Pt catalysts for methanol oxidation in direct methanol fuel cells
ترجمه فارسی عنوان
یک روش حلال برای سنتز کنترل قابل اندازه گیری از کاتالیزورهای پرتوی فوق العاده برای اکسیداسیون متانول در سلول های سوخت مستقیم متانول
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• An ethylene glycol-based approach for the synthesis of Pt/C catalysts with uniform Pt nanoparticles.
• Superior catalytic activity of Pt/C catalysts synthesized at EG/water volume ratio of 1/1 for methanol oxidation reaction.
• High performance of MEA for DMFC using Pt/C catalysts synthesized at EG/water volume ratio of 1/1 at anode.

An ethylene glycol (EG)-based approach has been developed for the synthesis of Pt/C catalysts with uniform Pt nanoparticles. A number of characterization techniques, including scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrochemical measurements are used to characterize the as-prepared Pt catalysts. The well-dispersed Pt nanoparticles with average size of approximate 2 nm could be obtained in the EG/water mixture with volume ratio of 1/1, which display higher activity for methanol oxidation than that of the Pt/C products prepared at other EG/water volume ratios (0:1, 2:1, and 1:0). In particular, the performance of the Pt nanoparticles prepared at EG/water volume ratio of 1/1 in the membrane electrode assembly for direct methanol fuel cells has also been evaluated and benchmarked by commercial Pt/C catalysts. This study offers a vivid example to synthesize Pt nanoparticles with fine size and good catalytic activity by simply tuning the solvent ratio in colloidal chemistry methods.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 117, 20 January 2014, Pages 480–485
نویسندگان
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