کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
220178 463320 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ordered mesoporous carbons (OMCs) as supports of electrocatalysts for direct methanol fuel cells (DMFCs): Effect of the pore characteristics of OMCs on DMFCs
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Ordered mesoporous carbons (OMCs) as supports of electrocatalysts for direct methanol fuel cells (DMFCs): Effect of the pore characteristics of OMCs on DMFCs
چکیده انگلیسی

Two types of ordered mesoporous carbons (OMCs-FT and OMCs-F) with different hexagonal pore frameworks were synthesized via two soft template routes. Structural characterizations revealed that OMCs-FT possessed broader mesopore range, more enhanced mesoporosity and higher surface area, compared with the counterpart of OMCs-F. In order to systematically investigate the relationship between the pore characteristics and electrochemical performances, two catalysts of OMCs-FT/Pt and OMCs-F/Pt were achieved by ethylene glycol-assisted reduction procedure. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements indicated that face-centered cubic Pt nanoparticles with an average size of 5.3 nm were homogeneously deposited on OMCs-FT while the mean size of 5.5 nm Pt nanoparticles had a relatively ransom dispersion on OMCs-F supports with some aggregations. The electrochemical results disclosed that OMCs-FT/Pt catalyst exhibited higher electrocatalytic activity and better stability than OMCs-F/Pt and commercially available E-TEK/Pt catalysts for methanol electro-oxidation. The broad mesopore range, enhanced mesoporosity and high surface area of OMCs-FT supports were considered to be the main reasons for its enhanced catalytic activity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 633, Issue 1, 1 August 2009, Pages 1–6
نویسندگان
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