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Engineering highly active Ag/Nb2O5@Nb2CTx (MXene) photocatalysts via steering charge kinetics strategy
Peng, Chao1,2; Xie, Xi3; Xu, Wenkang2; Zhou, Tao1; Wei, Ping1; Jia, Jianbo1; Zhang, Kun1; Cao, Yonghai2; Wang, Hongjuan2; Peng, Feng4; Yang, Rui3; Yan, Xiqiang5; Pan, Hui6; Yu, Hao2
2021-10-01
Source PublicationChemical Engineering Journal
ISSN1385-8947
Volume421
AbstractSteering charge kinetics is one of the most urgent unsolved issues in photocatalysis. The effective spatial separation of photogenerated electron-hole pairs is particularly important in the design and controllable preparation of nano-photocatalysts. Herein, one-dimensional NbO nanorod arrays with [0 0 1] orientation were grown in-situ on two-dimensional NbCT MXenes through a facile hydrothermal method for the first time. Ag nanoparticles were then photodeposited on the NbO nanorods to form hierarchical 0D/1D/2D nanohybrids. It was experimentally demonstrated that [sbnd]OH is predominantly adsorbed on NbCT as termination groups, which resulted in a low work function (2.7 eV). Thanks to the unique structure, the highly active [0 0 1] NbO nanorods afford high-efficiency photogeneration of electron-hole pairs, while the low-work-function [sbnd]OH terminated NbCT allows for trapping holes, and Ag nanoparticles act as electron reservoir and sites of hydrogen evolution reaction (HER). The ternary Ag/NbO@NbCT nanohybrids reached a record HER activity (682.2 and 824.2 μmol·gh use methanol and glycerol as sacrificial agents, respectively) among the niobium-based photocatalysts, demonstrating the potential of MXenes as a platform for the synthesis of high-performance heterojunction structures, where the tunable electronic property is a key factor.
Keyword0D/1D/2D nanohybrids Co-catalyst engineering Hydrogen evolution reaction Niobium carbides MXenes Steering charge kinetics
DOI10.1016/j.cej.2021.128766
URLView the original
Language英語English
Scopus ID2-s2.0-85105006235
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Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, China
2.School of Chemistry and Chemical Engineering, Key Laboratory of Fuel Cell Technology of Guangdong Province, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou, 510640, China
3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
4.School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, 510006, China
5.School of Materials Science and Energy Engineering, Guangdong Key Lab for Hydrogen Energy Technologies, Foshan University, Foshan, 528000, China
6.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, China
Recommended Citation
GB/T 7714
Peng, Chao,Xie, Xi,Xu, Wenkang,et al. Engineering highly active Ag/Nb2O5@Nb2CTx (MXene) photocatalysts via steering charge kinetics strategy[J]. Chemical Engineering Journal,2021,421.
APA Peng, Chao,Xie, Xi,Xu, Wenkang,Zhou, Tao,Wei, Ping,Jia, Jianbo,Zhang, Kun,Cao, Yonghai,Wang, Hongjuan,Peng, Feng,Yang, Rui,Yan, Xiqiang,Pan, Hui,&Yu, Hao.(2021).Engineering highly active Ag/Nb2O5@Nb2CTx (MXene) photocatalysts via steering charge kinetics strategy.Chemical Engineering Journal,421.
MLA Peng, Chao,et al."Engineering highly active Ag/Nb2O5@Nb2CTx (MXene) photocatalysts via steering charge kinetics strategy".Chemical Engineering Journal 421(2021).
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