Photoelectron "Bridge" in Van Der Waals Heterojunction for Enhanced Photocatalytic CO 2 Conversion Under Visible Light

Constructing Van der Waals heterojunction is a crucial strategy to achieve excellent photocatalytic activity. However, in most Van der Waals heterojunctions synthesized by ex situ assembly, electron transfer encounters huge hindrances at the interface between the two components due to the large spac...

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Published in:Advanced materials (Weinheim) 2023-09, Vol.35 (38), p.e2303047
Main Authors: Ismail, Pir Muhammad, Ali, Sajjad, Ali, Sharafat, Li, Jiahao, Liu, Min, Yan, Dong, Raziq, Fazal, Wahid, Fazli, Li, Guojing, Yuan, Shuhua, Wu, Xiaoqiang, Yi, Jiabao, Chen, Jun Song, Wang, Qingyuan, Zhong, Li, Yang, Ye, Xia, Pengfei, Qiao, Liang
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cited_by cdi_FETCH-LOGICAL-c1071-3d63c98a2120140e980b983f5fbeb8f6a78afc569053f4daec8b53b2220e17773
cites cdi_FETCH-LOGICAL-c1071-3d63c98a2120140e980b983f5fbeb8f6a78afc569053f4daec8b53b2220e17773
container_end_page
container_issue 38
container_start_page e2303047
container_title Advanced materials (Weinheim)
container_volume 35
creator Ismail, Pir Muhammad
Ali, Sajjad
Ali, Sharafat
Li, Jiahao
Liu, Min
Yan, Dong
Raziq, Fazal
Wahid, Fazli
Li, Guojing
Yuan, Shuhua
Wu, Xiaoqiang
Yi, Jiabao
Chen, Jun Song
Wang, Qingyuan
Zhong, Li
Yang, Ye
Xia, Pengfei
Qiao, Liang
description Constructing Van der Waals heterojunction is a crucial strategy to achieve excellent photocatalytic activity. However, in most Van der Waals heterojunctions synthesized by ex situ assembly, electron transfer encounters huge hindrances at the interface between the two components due to the large spacing and potential barrier. Herein, a phosphate-bridged Van der Waals heterojunction of cobalt phthalocyanine (CoPc)/tungsten disulfide (WS ) bridged by phosphate (xCoPc-nPO -WS ) is designed and prepared by the traditional wet chemistry method. By introducing a small phosphate molecule into the interface of CoPc and WS , creates an electron "bridge", resulting in a compact combination and eliminating the space barrier. Therefore, the phosphate (PO ) bridge can serve as an efficient electron transfer channel in heterojunction and can efficiently transmit photoelectrons from WS to CoPc under excited states. These excited photoelectrons are captured by the catalytic central Co in CoPc and subsequently convert CO molecules into CO and CH products, achieving 17-fold enhancement on the 3CoPc-0.6PO -WS sample compared to that of pure WS . Introducing a small molecule "bridge" to create an electron transfer channel provides a new perspective in designing efficient photocatalysts for photocatalytic CO reduction into valuable products.
doi_str_mv 10.1002/adma.202303047
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These excited photoelectrons are captured by the catalytic central Co in CoPc and subsequently convert CO molecules into CO and CH products, achieving 17-fold enhancement on the 3CoPc-0.6PO -WS sample compared to that of pure WS . 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