کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7720475 | 1497503 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Operando infrared spectroscopy of the fuel cell membrane electrode assembly Nafion-platinum interface
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Operando infrared spectroscopy of the fuel cell membrane electrode assembly Nafion-platinum interface Operando infrared spectroscopy of the fuel cell membrane electrode assembly Nafion-platinum interface](/preview/png/7720475.png)
چکیده انگلیسی
The Nafion-Pt interfaces in membrane electrode assemblies of operating fuel cells were studied by operando infrared spectroscopy. The potential dependence of atop adsorbed CO peak frequencies were measured over the potential range of 0-600 mV (vs. NHE) at 60 °C. Complex Stark tuning of peak frequencies arise from a combination of potential dependent coverage effects, and changes in the extent of back-donation from the metal d-band to the renormalized 2Ïâ MO of COads. The Nafion-Pt interface was studied at higher potentials (initiating at open circuit) by examining platinum reflectivity as a function of electrode potential. The oxygen reduction onset-current is coincident with the observance of a 2% step-increase in Pt reflectivity and emergence of Nafion-Pt interface spectra.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 6, 14 February 2014, Pages 2751-2755
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 6, 14 February 2014, Pages 2751-2755
نویسندگان
Ian Kendrick, Eugene S. Smotkin,