In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution

Solar photocatalytic hydrogen production shows promise in addressing global energy and environmental concerns. The limited efficiency of photocatalysts is mainly due to ineffective separation and transfer of photogenerated charges. To improve this, we enhance the TiO2–Ti3C2 heterojunction by in-situ...

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Main Authors: Liu, Peng, Zhao, Yahao, Liu, Wen, Ye, Furong, Lv, Hui, Peng, Zhuo, Han, Changcun, Ma, Xinguo, Tian, Jiayi, Zhan, Difu, Fu, Qian, Huang, Yizhong
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180763
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1807632024-10-23T02:31:31Z In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution Liu, Peng Zhao, Yahao Liu, Wen Ye, Furong Lv, Hui Peng, Zhuo Han, Changcun Ma, Xinguo Tian, Jiayi Zhan, Difu Fu, Qian Huang, Yizhong School of Materials Science and Engineering Engineering Photocatalytic H2 evolution Heterojunction Solar photocatalytic hydrogen production shows promise in addressing global energy and environmental concerns. The limited efficiency of photocatalysts is mainly due to ineffective separation and transfer of photogenerated charges. To improve this, we enhance the TiO2–Ti3C2 heterojunction by in-situ oxidation through interfacial engineering, resulting in a more compact composition. Subsequently, we anchor single-atom Pt at the TiO2–Ti3C2 interface through photo-Ti3C2 reduction. The in-situ growth of TiO2 on Ti3C2 introduces an interfacial driving force for carrier separation and provides a channel for electron transfer from TiO2 to Ti3C2. This further facilitates transfer onto Pt, shortening the migration distance and enhancing the photocatalytic efficiency. The best Pt/TiO2–Ti3C2 composite demonstrates an impressive hydrogen precipitation efficiency of 767 μmol g−1 h−1, surpassing TiO2 and Pt/TiO2 by factors of 12 times and 1.46 times, respectively. Furthermore, we developed a higher efficiency photocatalyst using the molten salt method to avoid the risks associated with conventional hydrofluoric acid etching. This research opens up new possibilities for the preparation of MXenes interface-modified catalysts, offering a valuable avenue for future exploration in the field. This work was financially supported by the National Natural Science Foundation of China (Grant No. 52103339), Natural Science Foundation of Hubei Province (Grant No. 2023AFB984, 2018CFB282) and China-Africa Partnership Institute Exchange Program of the Ministry of Science and Technology of China. 2024-10-23T02:31:31Z 2024-10-23T02:31:31Z 2024 Journal Article Liu, P., Zhao, Y., Liu, W., Ye, F., Lv, H., Peng, Z., Han, C., Ma, X., Tian, J., Zhan, D., Fu, Q. & Huang, Y. (2024). In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution. International Journal of Hydrogen Energy, 80, 1243-1254. https://dx.doi.org/10.1016/j.ijhydene.2024.07.255 0360-3199 https://hdl.handle.net/10356/180763 10.1016/j.ijhydene.2024.07.255 2-s2.0-85199035285 80 1243 1254 en International Journal of Hydrogen Energy © 2024 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Photocatalytic H2 evolution
Heterojunction
spellingShingle Engineering
Photocatalytic H2 evolution
Heterojunction
Liu, Peng
Zhao, Yahao
Liu, Wen
Ye, Furong
Lv, Hui
Peng, Zhuo
Han, Changcun
Ma, Xinguo
Tian, Jiayi
Zhan, Difu
Fu, Qian
Huang, Yizhong
In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
description Solar photocatalytic hydrogen production shows promise in addressing global energy and environmental concerns. The limited efficiency of photocatalysts is mainly due to ineffective separation and transfer of photogenerated charges. To improve this, we enhance the TiO2–Ti3C2 heterojunction by in-situ oxidation through interfacial engineering, resulting in a more compact composition. Subsequently, we anchor single-atom Pt at the TiO2–Ti3C2 interface through photo-Ti3C2 reduction. The in-situ growth of TiO2 on Ti3C2 introduces an interfacial driving force for carrier separation and provides a channel for electron transfer from TiO2 to Ti3C2. This further facilitates transfer onto Pt, shortening the migration distance and enhancing the photocatalytic efficiency. The best Pt/TiO2–Ti3C2 composite demonstrates an impressive hydrogen precipitation efficiency of 767 μmol g−1 h−1, surpassing TiO2 and Pt/TiO2 by factors of 12 times and 1.46 times, respectively. Furthermore, we developed a higher efficiency photocatalyst using the molten salt method to avoid the risks associated with conventional hydrofluoric acid etching. This research opens up new possibilities for the preparation of MXenes interface-modified catalysts, offering a valuable avenue for future exploration in the field.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Liu, Peng
Zhao, Yahao
Liu, Wen
Ye, Furong
Lv, Hui
Peng, Zhuo
Han, Changcun
Ma, Xinguo
Tian, Jiayi
Zhan, Difu
Fu, Qian
Huang, Yizhong
format Article
author Liu, Peng
Zhao, Yahao
Liu, Wen
Ye, Furong
Lv, Hui
Peng, Zhuo
Han, Changcun
Ma, Xinguo
Tian, Jiayi
Zhan, Difu
Fu, Qian
Huang, Yizhong
author_sort Liu, Peng
title In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
title_short In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
title_full In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
title_fullStr In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
title_full_unstemmed In situ oxidative growth to form compact TiO2–Ti3C2 heterojunctions for photocatalytic hydrogen evolution
title_sort in situ oxidative growth to form compact tio2–ti3c2 heterojunctions for photocatalytic hydrogen evolution
publishDate 2024
url https://hdl.handle.net/10356/180763
_version_ 1814777794091024384