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https://hdl.handle.net/10356/150838
Title: | Hierarchical NiO@N-doped carbon microspheres with ultrathin nanosheet subunits as excellent photocatalysts for hydrogen evolution | Authors: | Zhan, Wenwen Yuan, Yusheng Sun, Liming Yuan, Yaya Han, Xiguang Zhao, Yanli |
Keywords: | Science::Chemistry | Issue Date: | 2019 | Source: | Zhan, W., Yuan, Y., Sun, L., Yuan, Y., Han, X. & Zhao, Y. (2019). Hierarchical NiO@N-doped carbon microspheres with ultrathin nanosheet subunits as excellent photocatalysts for hydrogen evolution. Small, 15(22), 1901024-. https://dx.doi.org/10.1002/smll.201901024 | Project: | RG5/16 RG11/17 RG114/17 |
Journal: | Small | Abstract: | Achieving highly efficient hierarchical photocatalysts for hydrogen evolution is always challenging. Herein, hierarchical mesoporous NiO@N-doped carbon microspheres (HNINC) are successfully fabricated with ultrathin nanosheet subunits as high-performance photocatalysts for hydrogen evolution. The unique architecture of N-doped carbon layers and hierarchical mesoporous structures from HNINC could effectively facilitate the separation and transfer of photo-induced electron-hole pairs and afford rich active sites for photocatalytic reactions, leading to a significantly higher H₂ production rate than NiO deposited with platinum. Density functional theory calculations reveal that the migration path of the photo-generated electron transfer is from Ni 3d and O 2p hybrid states of NiO to the C 2p state of graphite, while the photo-generated holes locate at Ni 4s and Ni 4p hybrid states of NiO, which is beneficial to improve the separation of photo-generated electron-hole pairs. Gibbs free energy of the intermediate state for hydrogen evolution reaction is calculated to provide a fundamental understanding of the high H₂ production rate of HNINC. This research sheds light on developing novel photocatalysts for efficient hydrogen evolution. | URI: | https://hdl.handle.net/10356/150838 | ISSN: | 1613-6810 | DOI: | 10.1002/smll.201901024 | Schools: | School of Physical and Mathematical Sciences | Rights: | © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SPMS Journal Articles |
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