کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148799 | 1497867 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photoelectrochemical properties of BiMnO3 thin films and nanostructures
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report and compare the properties of BiMnO3 (BMO) nanostructures and thin films as photoanodes in photoelectrochemical solar cells. BMO films are grown on Niobium doped SrTiO3 crystalline substrates using pulse laser deposition. Nanoscale patterns of BMO are obtained by depositing through nanostencils, namely shadow masks with nanometer-scale circular apertures. We demonstrate that BMO nanostructures exhibit superior photoelectrochemical properties, compared to BMO thin films when used as photoelectrodes in cells for hydrogen production. A photocurrent density of â¼0.9 mA cmâ2 at 0.8 V vs Ag/AgCl (1.38 V vs RHE) under 1 Sun is recorded for BMO nanostructures. On the other hand, BMO films exhibit a photocurrent density of â¼40 μA cmâ2 at 0.4 V vs Ag/AgCl (0.98 V vs RHE) under 2 Sun which is four times higher than that recorded under 1 Sun illumination (â¼10 μA cmâ2 at 0.4 V vs Ag/AgCl). Mott-Schottky analysis evidences n-type characteristics for both BMO thin films and nanostructures. According to band alignment with respect to the redox potential of water, we conclude that both types of photoelectrodes are suitable for oxygen evolution reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 365, 15 October 2017, Pages 162-168
Journal: Journal of Power Sources - Volume 365, 15 October 2017, Pages 162-168
نویسندگان
Joyprokash Chakrabartty, David Barba, Lei Jin, Daniele Benetti, Federico Rosei, Riad Nechache,