Rapid Surface Reconstruction of In 2 S 3 Photoanode via Flame Treatment for Enhanced Photoelectrochemical Performance.

Autor: Jeong YJ; Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea.; Department of Material Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea., Tan R; Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea.; Department of Material Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea., Nam S; Department of Nano Engineering, Department of Nano Science and Technology, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.; SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon, 16419, Republic of Korea., Lee JH; Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea.; Department of Material Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea., Kim SK; Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea., Lee TG; Department of Material Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea., Shin SS; Department of Nano Engineering, Department of Nano Science and Technology, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.; SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, Suwon, 16419, Republic of Korea., Zheng X; Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA., Cho IS; Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea.; Department of Material Science & Engineering, Ajou University, Suwon, 16499, Republic of Korea.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 May 08, pp. e2403164. Date of Electronic Publication: 2024 May 08.
DOI: 10.1002/adma.202403164
Abstrakt: Surface reconstruction, reorganizing the surface atoms or structure, is a promising strategy to manipulate materials' electrical, electrochemical, and surface catalytic properties. Herein, a rapid surface reconstruction of indium sulfide (In 2 S 3 ) is demonstrated via a high-temperature flame treatment to improve its charge collection properties. The flame process selectively transforms the In 2 S 3 surface into a diffusionless In 2 O 3 layer with high crystallinity. Additionally, it controllably generates bulk sulfur vacancies within a few seconds, leading to surface-reconstructed In 2 S 3 (sr-In 2 S 3 ). When using those sr-In 2 S 3 as photoanode for photoelectrochemical water splitting devices, these dual functions of surface In 2 O 3 /bulk In 2 S 3 reduce the charge recombination in the surface and bulk region, thus improving photocurrent density and stability. With optimized surface reconstruction, the sr-In 2 S 3 photoanode demonstrates a significant photocurrent density of 8.5 mA cm -2 at 1.23 V versus a reversible hydrogen electrode (RHE), marking a 2.5-fold increase compared to pristine In 2 S 3 (3.5 mA cm -2 ). More importantly, the sr-In 2 S 3 photoanode exhibits an impressive photocurrent density of 7.3 mA cm -2 at 0.6 V versus RHE for iodide oxidation reaction. A practical and scalable surface reconstruction is also showcased via flame treatment. This work provides new insights for surface reconstruction engineering in sulfide-based semiconductors, making a breakthrough in developing efficient solar-fuel energy devices.
(© 2024 The Authors. Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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