Document Type
Journal Article
Publication Title
Applied Catalysis B: Environmental
Volume
333
Publisher
Elsevier
School
School of Science
RAS ID
58438
Funders
Australian Research Council / ECU Vice-Chancellor’s Professorial Research Fellowship / National Natural Science Foundation of China (51676096)
Grant Number
ARC Numbers : DP170104264, DP190103548
Grant Link
http://purl.org/au-research/grants/arc/DP170104264 / http://purl.org/au-research/grants/arc/DP190103548
Abstract
Photocatalytic hydrogen production is a green technology while significantly impeded by the sluggish and uncontrolled charge dynamics for less electron accumulation on catalyst surface. Herein, we proposed an effective strategy of epitaxial growth of a van der Waals (VDW) homojunction on an intralayer homojunction of carbon nitride for a controlled charge flow. Experimental and simulation collectively disclosed a tandem internal electric field (IEF) in the integrated hybrid, stringing a lateral IEF along the intralayer homojunction with a vertical IEF within the VDW homojunction. The planar IEF dominates laterally dispersive movement of charge carriers for their efficient separations and mobilities, meanwhile the vertical IEF induces an oriented accumulation of the dispersive hot electrons to the catalyst surface for intensified hydrogen reduction. The tandem IEF renders the hydrogen evolution rate at 3.5-fold higher than in-planar homojunction, and 6.3 times higher than g-C3N4 benchmark. This work realizes charge-directing dynamics for robust photocatalysis.
DOI
10.1016/j.apcatb.2023.122781
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Comments
Zhang, J., Tan, X., Shi, L., Chen, H., Liu, Y., Wang, S., ... & Wang, S. (2023). Tandem internal electric fields in intralayer/interlayer carbon nitride homojunction with a directed flow of photo-excited electrons for photocatalysis. Applied Catalysis B: Environmental, 333, Article 122781. https://doi.org/10.1016/j.apcatb.2023.122781