کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7713842 1497431 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of synthesis conditions on the performance of chitosan-Heteropolyacid complexes as membranes for low temperature H2-O2 fuel cell
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Influence of synthesis conditions on the performance of chitosan-Heteropolyacid complexes as membranes for low temperature H2-O2 fuel cell
چکیده انگلیسی
Flat, free-standing chitosan/phosphotungstic acid (PTA) polyelectrolyte membranes were prepared by in-situ ionotropic gelation process at room temperature on porous alumina support firstly impregnated by H3PW12O40. Scanning electron microscopy revealed the formation of compact and homogeneous membranes, whose thickness resulted to be dependent on chitosan concentration and reticulation time. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) evidenced the formation of almost amorphous membrane without appreciable concentration of not protonated NH2 groups and PTA3− ions with preserved Keggin structure. Membranes were tested as proton conductor in low temperature H2-O2 fuel cell allowing to get peak power densities up to 300 mW cm−2. Electrochemical impedance measurements allowed to estimate polyelectrolytes' conductivity up to 28 mS cm−1 at room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 42, 9 November 2015, Pages 14616-14626
نویسندگان
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