کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185593 459599 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simple one-pot synthesis of platinum-palladium nanoflowers with enhanced catalytic activity and methanol-tolerance for oxygen reduction in acid media
ترجمه فارسی عنوان
سنتز ساده یک گلدان نانولوله های پلاتین با پلاتین با فعالیت کاتالیزوری افزایش یافته و تحمل متانول برای کاهش اکسیژن در رسانه های اسیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Bimetallic alloyed PtPd nanoflowers are prepared by a simple one-pot solvothermal co-reduction method.
• PtPd nanoflowers display high catalytic performance for ORR dominated by a four-electron pathway.
• PtPd nanoflowers show good methanol tolerance for ORR.

In this work, bimetallic alloyed platinum-palladium (PtPd) nanoflowers are fabricated by one-pot solvothermal co-reduction of Pt (II) acetylacetonate and Pd (II) acetylacetonate in oleylamine system. The as-prepared nanostructures show the enhanced electrocatalytic activity for oxygen reduction reaction (ORR), dominated by a four-electron pathway based on the Koutecky-Levich plots, mainly owing to the inhibition of the formation of Pt–OHad via the downshift of d-band center for Pt. Meanwhile, PtPd nanoflowers display good methanol tolerance and improved stability for ORR. The chronoamperometry test reveals that the current of PtPd nanoflowers remains 45.9% of its original value within 6000 s, much higher than those of commercial Pt (36.7%) and Pd (32.2%) black catalysts. Therefore, PtPd nanoflowers with unique interconnected structures can be used as a promising cathode catalyst in direct methanol fuel cells.

PtPd nanoflowers were fabricated by one-pot solvothermal co-reduction method in oleylamine system, which exhibited the improved electrocatalytic activity and higher methanol tolerance for oxygen reduction, compared with commercial Pt and Pd black catalysts.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 137, 10 August 2014, Pages 431–438
نویسندگان
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