کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7728056 | 1497907 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Suppression of oxygen reduction reaction activity on Pt-based electrocatalysts from ionomer incorporation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Suppression of oxygen reduction reaction activity on Pt-based electrocatalysts from ionomer incorporation Suppression of oxygen reduction reaction activity on Pt-based electrocatalysts from ionomer incorporation](/preview/png/7728056.png)
چکیده انگلیسی
The impact of Nafion on the oxygen reduction reaction (ORR) activity is studied for Pt/C and Pt-alloy/C catalysts using thin-film rotating disk electrode (TF-RDE) methods in 0.1Â M HClO4. Ultrathin uniform catalyst layers and standardized activity measurement protocols are employed to obtain accurate and reproducible ORR activity. Nafion lowers the ORR activity which plateaus with increasing loading on Pt catalysts. Pt particle size is found not to have significant influence on the extent of the SA decrease upon Nafion incorporation. Catalysts using high surface area carbon (HSC) support exhibit attenuated activity loss resulting from lower ionomer coverage on catalyst particles located within the deep pores. The impact of metallic composition on the activity loss due to Nafion incorporation is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 325, 1 September 2016, Pages 745-751
Journal: Journal of Power Sources - Volume 325, 1 September 2016, Pages 745-751
نویسندگان
Kazuma Shinozaki, Yu Morimoto, Bryan S. Pivovar, Shyam S. Kocha,