Citation: Guobing Mao, Heng Wu, Tianyang Qiu, Dingjie Bao, Longjie Lai, Wenguang Tu, Qi Liu. WO₃@Fe₂O₃ Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting[J]. Chinese Journal of Structural Chemistry, ;2022, 41(8): 220802. doi: 10.14102/j.cnki.0254-5861.2022-0086 shu

WO₃@Fe₂O₃ Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting

Guobing Mao ¹ ,
Heng Wu ^{1, 4} ,
Tianyang Qiu ² ,
Dingjie Bao ¹ ,
Longjie Lai ¹ ,
Wenguang Tu ^3,, ,
Qi Liu ^1,,

1.
School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, China
2.
Key Laboratory of Modern Acoustics (MOE), Institute of Acoustics, School of Physics, Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing 210093, China
3.
School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
4.
School of Mechanical Engineering, Anhui Institute of Information Technology, Wuhu, Anhui 241100, China

Corresponding author: Wenguang Tu, tuwenguang@cuhk.edu.cn Qi Liu, modieer_67@ahpu.edu.cn
Received Date: 12 April 2022
Accepted Date: 14 May 2022
Available Online: 31 May 2022

Figures(7)

Photoelectrochemical (PEC) hydrogen production from water splitting is a green technology to convert solar energy into renewable hydrogen fuel. The construction of host/guest architecture in semiconductor photoanodes has been proven to be an eﬀective strategy to improve solar-to-fuel conversion eﬃciency. In this study, WO₃@Fe₂O₃ core-shell nanoarray heterojunction photoanodes are synthesized from the in-situ decomposition of WO₃@Prussian blue (WO₃@PB) and then used as host/guest photoanodes for photoelectrochemical water splitting, during which Fe₂O₃ serves as guest material to absorb visible solar light and WO₃ can act as host scaﬀolds to collect electrons at the contact. The prepared WO₃@Fe₂O₃ shows the enhanced photocurrent density of 1.26 mA cm^-2 (under visible light) at 1.23 V. vs RHE and a superior IPEC of 24.4% at 350 nm, which is higher than that of WO₃@PB and pure WO₃ (0.43 mA/cm^-2 and 16.3%, 0.18 mA/cm^-2 and 11.5%) respectively, owing to the efficient light-harvesting from Fe₂O₃ and the enhanced electron-hole pairs separation from the formation of type-II heterojunctions, and the direct and ordered charge transport channels from the one-dimensional (1D) WO₃ nanoarray nanostructures. Therefore, this work provides an alternative insight into the construction of sustainable and cost-effective photoanodes to enhance the efficiency of the solar-driven water splitting.
- host/guest photoelectrodes,
- WO₃,
- a-Fe₂O₃,
- core-shell nanostructures,
- one-dimensional nanoarray
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WO3@Fe2O3 Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting

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WO₃@Fe₂O₃ Core-Shell Heterojunction Photoanodes for Efficient Photoelectrochemical Water Splitting