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SCIENCE CHINA Materials, Volume 61, Issue 6: 887-894(2018) https://doi.org/10.1007/s40843-017-9199-5

A novel CoOOH/(Ti, C)-Fe2O3 nanorod photoanode for photoelectrochemical water splitting

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  • ReceivedOct 29, 2017
  • AcceptedDec 28, 2017
  • PublishedJan 29, 2018

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).


Funded by

Natural Science Foundation of Guangdong Province(2017A030313055)

Jinan University(11617326)

the National Natural Science Foundation of China(21706295)


Acknowledgment

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).


Interest statement

The authors declare no conflict of interest.


Contributions statement

Ye KH performed the main experiments; Wang Z and Li H participated in the characterization; Ye KH wrote the manuscript with support from Huang Y and Mai W. All authors contributed to the general discussion.


Author information

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.

Supplement

Supplementary information

Supporting data are available in the online version of the paper.


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