Volume 19, Issue 40 2301114
Research Article

Surface Self-Transforming FeTi-LDH Overlayer in Fe2O3/Fe2TiO5 Photoanode for Improved Water Oxidation

Juliette Chancellevie Nalouzebi Fouemina

Juliette Chancellevie Nalouzebi Fouemina

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

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Guoqing Li

Guoqing Li

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

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Xiaojie She

Xiaojie She

Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, 999077 P. R. China

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Duan Yan

Duan Yan

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

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Xiaoxin Lv

Xiaoxin Lv

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

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Kaiqi Nie

Kaiqi Nie

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049 China

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Jiujun Deng

Corresponding Author

Jiujun Deng

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

E-mail: [email protected]; [email protected]

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Hui Xu

Corresponding Author

Hui Xu

Institute for Energy Research, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013 China

E-mail: [email protected]; [email protected]

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First published: 06 June 2023
Citations: 5

Abstract

Integrating hematite nanostructures with efficient layer double hydroxides (LDHs) is highly desirable to improve the photoelectrochemical (PEC) water oxidation performance. Here, an innovative and facile strategy is developed to fabricate the FeTi-LDH overlayer decorated Fe2O3/Fe2TiO5 photoanode via a surface self-transformation induced by the co-treatment of hydrazine and NaOH at room temperature. Electrochemical measurements find that this favorable structure can not only facilitate the charge transfer/separation at the electrode/electrolyte interface but also accelerate the surface water oxidation kinetics. Consequently, the as-obtained Fe2O3/Fe2TiO5/LDH photoanode exhibits a remarkably increased photocurrent density of 3.54 mA cm−2 at 1.23 V versus reversible hydrogen electrode (RHE) accompanied by an obvious cathodic shift (≈140 mV) in the onset potential. This work opens up a new and effective pathway for the design of high-performance hematite photoanodes toward efficient PEC water oxidation.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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