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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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. |
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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 |
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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. |
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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 |
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1814777794091024384 |