کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7935006 | 1513047 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ growth of ultrathin Co-MOF nanosheets on α-Fe2O3 hematite nanorods for efficient photoelectrochemical water oxidation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
Efficient charge transport is an important factor in photoelectrochemical (PEC) water splitting. The charge transfer at the semiconductor/electrolyte interface is of great importance, especially for the complex water oxidation reaction. In this study, we explored the feasibility of improving charge transfer efficiency at the interface of semiconductor/electrolyte by in situ growth of Co based Metal-Organic Frame work (Co-MOF) through a facile ion-exchanging method. Under optimized conditions, the Co-MOF nanosheet-modified hematite gave a photocurrent density of 2.0â¯mAâ¯cmâ2 (200% improvement) at 1.23 VRHE with a cathodic shift of 180â¯mV in the photocurrent onset potential, in comparison to bare α-Fe2O3 (0.71â¯mAâ¯cmâ2@1.23 VRHE). To elucidate the role of Co-MOF, X-ray photoelectron spectroscopy, electrochemical impedance spectroscopy and Mott-Schottky measurements were carried out. It was found that the atomically distributed Co2+ in Co-MOF possessed excellent hole storage capability and charge transfer efficiency, as evidenced by the high surface capacitance and extremely low surface charge transfer resistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy - Volume 171, 1 September 2018, Pages 388-396
Journal: Solar Energy - Volume 171, 1 September 2018, Pages 388-396
نویسندگان
Qi Zhang, Hongyan Wang, Yixin Dong, Jitong Yan, Xuebin Ke, Quanping Wu, Song Xue,