کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7715211 | 1497443 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of ionic transport through BaCe0.2 Zr0.7Y0.1O3âδ membranes in galvanic and electrolytic operation
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterization of ionic transport through BaCe0.2 Zr0.7Y0.1O3âδ membranes in galvanic and electrolytic operation Characterization of ionic transport through BaCe0.2 Zr0.7Y0.1O3âδ membranes in galvanic and electrolytic operation](/preview/png/7715211.png)
چکیده انگلیسی
Proton-conducting ceramic electrochemical devices were fabricated consisting of a 25-μm-thick BaCe0.2Zr0.7Y0.1O3âδ (BCZY27) electrolyte membrane supported on a 1-mm-thick Ni/BCZY27 fuel electrode, and an air electrode consisting of a 40-μm-thick porous BCZY27 backbone infiltrated with La2NiO4+δ catalyst. Hydrogen flux was measured as a function of gas environment at the air electrode and as a function of applied cell potential and current at 700 °C. The hydrogen transference number decreased significantly, reaching levels as low as 0.05 when hydrogen is transported against the concentration gradient, even with reducing gas environments on both sides of the membrane. Additionally, the hydrogen transference number decreased with increasing applied potential and current. The decrease in hydrogen transport efficiency must be compensated by an ionic or electronic flux. These results show that charge transfer in these materials can be dominated by electronic defects in high-current electrolytic regimes, without the need for ionic co-transport.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 30, 10 August 2015, Pages 9278-9286
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 30, 10 August 2015, Pages 9278-9286
نویسندگان
Sean M. Babiniec, Sandrine Ricote, Neal P. Sullivan,