کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1294648 973629 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving MEA durability by using surface-treated catalysts
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Improving MEA durability by using surface-treated catalysts
چکیده انگلیسی

In order to improve the durability of membrane electrode assemblies (MEAs), surface treatments of carbon-supported Pt catalysts are studied. When treating catalysts with amines, especially hindered amine light stabilizers (HALS), durability testing of an MEA drastically improved. The amino groups in the molecule of HALS are considered to react with carboxyl groups on carbon support to form complexes. It was confirmed that hydrogen peroxide formation is retarded in the case of HALS-added catalyst by using a hydrogen peroxide test paper. Together with the results of the catalyst surface treatments using nitric acid and dehydrated ethanol, it was clarified that surface functional groups, carboxyl and/or hydroxyl groups, on the carbon support play an important role in the generation of hydrogen peroxide during fuel cell operation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 181, Issue 2, 1 July 2008, Pages 287–291
نویسندگان
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