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Title: Efficient photocatalytic H2 production via rational design of synergistic spatially-separated dual cocatalysts modified Mn0.5Cd0.5S photocatalyst under visible light irradiation

Abstract

Noble metal-free highly efficient cocatalysts are very important for cost efficient hydrogen fuel production. While most studies concentrate on single cocatalyst photocatalytic systems. Here, we report on the synthesis of Mn0.5Cd0.5S photocatalyst hetero-architecture with synergistic spatially separated dual cocatalysts Cu2-xS and MoS2 for highly efficient photocatalytic H-2 production. Through tactfully utilizing Cu2-xS/Mn0.5Cd0.5S nanoscale p-n junction to promote efficient transfer of photo-generated holes to Cu2-xS and MoS2 can be located exactly on the different positions where the photo-generated electrons must go through by photo-reduction of (NH4)(2)MoS4. Cu2-xS can be an oxidation active site to assemble photo-generated holes and MoS2 can capture and transport the photon-generated electrons. Therefore the photo-induced carriers can be efficiently separated and transferred to take part in photocatalytic reactions. The prepared Cu2-xS (0.015)/Mn0.5Cd0.5S/MoS2 (3 wt %) photocatalyst shows the highest H-2 production rate of 687.62 mu mol/h, which exceeds the rate of Mn0.5Cd0.5S and Mn0.5Cd0.5S loaded with Cu2-xS or MoS2 alone by 22, 1.7 and 3.48 times, respectively. This work provides a new thought to design efficient spatially separated and synergistic dual cocatalysts modified photocatalysts for H-2 production.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; National Natural Science Foundation of China (NNSFC); National Basic Research Program of China
OSTI Identifier:
1481200
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Chemical Engineering Journal
Additional Journal Information:
Journal Volume: 337; Journal Issue: C; Journal ID: ISSN 1385-8947
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
Dual cocatalysts; Mn0.5Cd0.5S; P-n junction; Photocatalytic H2 production

Citation Formats

Liu, Xiaolei, Liu, Qi, Wang, Peng, Liu, Yuzi, Huang, Baibiao, Rozhkova, Elena A., Zhang, Qianqian, Wang, Zeyan, Dai, Ying, and Lu, Jun. Efficient photocatalytic H2 production via rational design of synergistic spatially-separated dual cocatalysts modified Mn0.5Cd0.5S photocatalyst under visible light irradiation. United States: N. p., 2018. Web. doi:10.1016/j.cej.2017.12.125.
Liu, Xiaolei, Liu, Qi, Wang, Peng, Liu, Yuzi, Huang, Baibiao, Rozhkova, Elena A., Zhang, Qianqian, Wang, Zeyan, Dai, Ying, & Lu, Jun. Efficient photocatalytic H2 production via rational design of synergistic spatially-separated dual cocatalysts modified Mn0.5Cd0.5S photocatalyst under visible light irradiation. United States. doi:10.1016/j.cej.2017.12.125.
Liu, Xiaolei, Liu, Qi, Wang, Peng, Liu, Yuzi, Huang, Baibiao, Rozhkova, Elena A., Zhang, Qianqian, Wang, Zeyan, Dai, Ying, and Lu, Jun. Sun . "Efficient photocatalytic H2 production via rational design of synergistic spatially-separated dual cocatalysts modified Mn0.5Cd0.5S photocatalyst under visible light irradiation". United States. doi:10.1016/j.cej.2017.12.125.
@article{osti_1481200,
title = {Efficient photocatalytic H2 production via rational design of synergistic spatially-separated dual cocatalysts modified Mn0.5Cd0.5S photocatalyst under visible light irradiation},
author = {Liu, Xiaolei and Liu, Qi and Wang, Peng and Liu, Yuzi and Huang, Baibiao and Rozhkova, Elena A. and Zhang, Qianqian and Wang, Zeyan and Dai, Ying and Lu, Jun},
abstractNote = {Noble metal-free highly efficient cocatalysts are very important for cost efficient hydrogen fuel production. While most studies concentrate on single cocatalyst photocatalytic systems. Here, we report on the synthesis of Mn0.5Cd0.5S photocatalyst hetero-architecture with synergistic spatially separated dual cocatalysts Cu2-xS and MoS2 for highly efficient photocatalytic H-2 production. Through tactfully utilizing Cu2-xS/Mn0.5Cd0.5S nanoscale p-n junction to promote efficient transfer of photo-generated holes to Cu2-xS and MoS2 can be located exactly on the different positions where the photo-generated electrons must go through by photo-reduction of (NH4)(2)MoS4. Cu2-xS can be an oxidation active site to assemble photo-generated holes and MoS2 can capture and transport the photon-generated electrons. Therefore the photo-induced carriers can be efficiently separated and transferred to take part in photocatalytic reactions. The prepared Cu2-xS (0.015)/Mn0.5Cd0.5S/MoS2 (3 wt %) photocatalyst shows the highest H-2 production rate of 687.62 mu mol/h, which exceeds the rate of Mn0.5Cd0.5S and Mn0.5Cd0.5S loaded with Cu2-xS or MoS2 alone by 22, 1.7 and 3.48 times, respectively. This work provides a new thought to design efficient spatially separated and synergistic dual cocatalysts modified photocatalysts for H-2 production.},
doi = {10.1016/j.cej.2017.12.125},
journal = {Chemical Engineering Journal},
issn = {1385-8947},
number = C,
volume = 337,
place = {United States},
year = {2018},
month = {4}
}