کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1281276 1497499 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cycle durability of metal oxide supports for PEFC electrocatalysts
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Cycle durability of metal oxide supports for PEFC electrocatalysts
چکیده انگلیسی


• Durability of oxide-supported PEFC electrocatalysts is systematically compared.
• Protocols to evaluate electrocatalysts are applied, simulating FC vehicle operation.
• Excellent cycle durability of Pt/SnO2 has been clearly verified.

In order to develop durable electrocatalysts for polymer electrolyte fuel cells, six different metal oxides, namely MoO3, SnO2, Nb2O5, Ta2O5, TiO2, and WO3, are selected as thermochemically stable, carbon-free platinum electrocatalyst support materials. The stability of Pt on these alternative oxide support materials is systematically analyzed, for the first time, using common experimental protocols simulating realistic fuel cell vehicle operation. Pt/SnO2 shows the best performance in terms of both electrochemical activity, and stability against dissolution. Pt dissolution rates in Pt/SnO2 are comparable to those of conventional Pt/C electrocatalysts. These results suggest that SnO2 is a promising candidate as an alternative electrocatalyst support.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 10, 26 March 2014, Pages 5074–5082
نویسندگان
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