کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5145271 | 1497341 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Induced changes of Pt/C in activity and durability through heat-treatment for oxygen reduction reaction in acidic medium
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Induced changes of Pt/C in activity and durability through heat-treatment for oxygen reduction reaction in acidic medium Induced changes of Pt/C in activity and durability through heat-treatment for oxygen reduction reaction in acidic medium](/preview/png/5145271.png)
چکیده انگلیسی
In this study, the Pt/C catalysts systematically heat-treated from 200 to 800 °C are characterized physically and chemically to investigate the induced properties for the activity and durability. The relative intensity of Pt0 increases from approximately 40 to 70% and the mean Pt particle size mildly increases as the temperature increases from 200 to 600 °C. However, the Pt/C heat-treated at 800 °C sharply increases and shows poor Pt particle size distribution resulting in the poor electrochemical performance. Catalysts prepared at between 200 and 600 °C exhibit similar electrocatalytic properties. Durability tests using sweeping potential between 0.6 and 1.0 V show that the durability of catalysts heat-treated at 400-600 °C significantly increases since the Pt oxide can be readily dissolved under potential cycling as compared to the Pt0. We strongly believe that the induced changes by heat-treatment play an important role in the challenges for fuel cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 36, 7 September 2017, Pages 22830-22840
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 36, 7 September 2017, Pages 22830-22840
نویسندگان
Won Suk Jung, Jaeyoung Lee,