Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105571
Title: Enhanced charge transport and increased active sites on α-Fe2O3 (110) nanorod surface containing oxygen vacancies for improved solar water oxidation performance
Authors: Hu, Jun
Zhao, Xin
Chen, Wei
Chen, Zhong
Keywords: Electrical Properties
Atmospheric Chemistry
Engineering::Materials::Energy materials
Issue Date: 2018
Source: Hu, J., Zhao, X., Chen, W., & Chen, Z. (2018). Enhanced charge transport and increased active sites on α-Fe2O3 (110) nanorod surface containing oxygen vacancies for improved solar water oxidation performance. ACS Omega, 3(11), 14973-14980. doi:10.1021/acsomega.8b01195
Series/Report no.: ACS Omega
Abstract: The effect of oxygen vacancies (VO) on α-Fe2O3 (110) facet on the performance of photoelectrochemical (PEC) water splitting is researched by both experiments and density functional theory (DFT) calculations. The experimental results manifest that the enhancement in photocurrent density by the presence of VO is related with increased charge separation and charge-transfer efficiencies. The electrochemical analysis reveals that the sample with VO demonstrates an enhanced carrier density and reduced charge-transfer resistance. The results of DFT calculation indicate that the better charge separation is also contributed by the decrease of potential on the VO surface, which improves the hole transport from the bulk to the surface. The reduced charge-transfer resistance is owing to the greatly increased number of active sites. The current study provides important insight into the roles of VO on α-Fe2O3 photoanode, especially on its surface catalysis. The generated lesson is also helpful for the improvement of other PEC photoanode materials.
URI: https://hdl.handle.net/10356/105571
http://hdl.handle.net/10220/50308
DOI: 10.1021/acsomega.8b01195
Rights: © 2018 American Chemical Society. All rights reserved. This paper was published in ACS Omega and is made available with the permission of American Chemical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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