Abstract
In this work, we demonstrate the CoOOH/(Ti, C)-Fe2O3 (CTCF) nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical (PEC) water splitting. The photocurrent density of CTCF photoanode is 1.85 mA cm−2 at +1.23 V vs. reversible hydrogen electrode (RHE), which is more than 20 times higher than that of pristine α-Fe2O3 photoanode (0.08 mA cm−2). The incident-photo-to-current conversion efficiency, applied bias photo-to-current efficiency and transfer efficiency of CTCF photoanode reaches 31.2% at 380 nm (+1.23 V vs. RHE), 0.11% (+1.11 V vs. RHE), 68.2% (+1.23 V vs. RHE) respectively, which are much higher than those of pristine α-Fe2O3 photoanode. Additionally, the longtime irradiation PEC water splitting of CTCF photoanode demonstrates its high stability at extreme voltage in NaOH (pH 14).
摘要
本论文利用一种温和的方法合成了CoOOH/(Ti, C)-Fe2O3(CTCF)纳米棒光阳极, 并对其光电解水性能进行了研究. 在可见光照和1.0 V偏压(相对可逆氢电极)条件下, CTCF光阳极产生的光电流密度为1.85 mA cm−2, 远高于传统的α-Fe2O3光阳极的光电流密度. 同时, 该电极在强碱性电解液中(pH 14)可以保持较长时间的稳定性.
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Acknowledgements
This work was preliminarily supported by the National Natural Science Foundation of China (21706295, 51772135 and 21376104), the Natural Science Foundation of Guangdong Province (2017A030313055 and 2014A030306010) and Jinan University (11617326 and 88017418).
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Kai-Hang Ye received his BSc degree in chemistry from Guangzhou University in 2014, MSc degree in physical chemistry from Jinan University (JNU) in 2017. Currently, he is a PhD student majored in physical chemistry from Sun Yat-Sen University (SYSU). His research interests include photoelectrochemical cell water splitting.
Zilong Wang received his BSc (2010) and MSc (2012) from the School of Chemistry and Chemical Engineering, SYSU. Then he received his PhD degree in Prof. Shihe Yang’s group in Hong Kong University of Science and Technology. He is now a lecturer in JNU. His current research focuses on nanomaterials and their applications for energy storage and fuel cells.
Yongchao Huang received his BSc degree in chemistry from Huizhou University in 2011, MSc degree in chemistry from JNU in 2013, and PhD degree in chemistry from SYSU. Currently, he is an associate professor at the School of Environmental Science and Engineering, Guangzhou University. His research interests include environmental catalysis, such as photocatalysis and photoelectrochemical catalysis.
Wenjie Mai received his BSc degree in physics (2002) from Peking University (PKU) and PhD degree in materials science and engineering (2009) from Georgia Institute of Technology. He is now a Professor in JNU. His main research interest includes energy conversion, harvesting and storage devices, such as supercapacitors, dye-sensitised solar cells, nanogenerators, and photoelectrochemical water splitting.
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Ye, KH., Wang, Z., Li, H. et al. A novel CoOOH/(Ti, C)-Fe2O3 nanorod photoanode for photoelectrochemical water splitting. Sci. China Mater. 61, 887–894 (2018). https://doi.org/10.1007/s40843-017-9199-5
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DOI: https://doi.org/10.1007/s40843-017-9199-5