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https://hdl.handle.net/2440/138881
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Type: | Journal article |
Title: | Edge-Rich Bicrystalline 1T/2H-MoS₂ Cocatalyst-Decorated {110} Terminated CeO₂ Nanorods for Photocatalytic Hydrogen Evolution |
Other Titles: | Edge-Rich Bicrystalline 1T/2H-MoS2 Cocatalyst-Decorated {110} Terminated CeO2 Nanorods for Photocatalytic Hydrogen Evolution |
Author: | Zhu, C. Xian, Q. He, Q. Chen, C. Zou, W. Sun, C. Wang, S. Duan, X. |
Citation: | ACS Applied Materials and Interfaces, 2021; 13(30):35818-35827 |
Publisher: | American Chemical Society |
Issue Date: | 2021 |
ISSN: | 1944-8244 1944-8252 |
Statement of Responsibility: | Chengzhang Zhu, Qiming Xian, Qiuying He, Chuanxiang Chen, Weixin Zou, Cheng Sun, Shaobin Wang, and Xiaoguang Duan |
Abstract: | Developing all-solid-state Z-scheme systems with highly active photocatalysts are of huge interest in realizing long-term solar-to-fuel conversion. Here we reported an innovative hybrid of {110}-oriented CeO2 nanorods with edge-enriched bicrystalline 1T/2H-MoS2 coupling as efficient photocatalysts for water splitting. In the composites, the metallic 1T phase acts as an excellent solid state electron mediator in the Z-scheme, while the 2H phase and CeO2 are the adsorption sites of the photosensitizer and reactant (H2O), respectively. Through optimal structure and phase engineering, 1T/2H-MoS2@CeO2 heterojunctions simultaneously achieve high charge separation efficiency, proliferated density of exposed active sites, and excellent affinity to reactant molecules, reaching a superior hydrogen evolution rate of 73.1 μmol/h with an apparent quantum yield of 8.2% at 420 nm. Furthermore, density functional theory calculations show that 1T/2H-MoS2@CeO2 possesses the advantages of intensive electronic interaction from the built-in electric field (negative MoS2 and positive charged CeO2) and reduced H2O adsorption/dissociation energies. This work sheds light on the design of on-demand noble-metal-free Z-scheme heterostructures for solar energy conversion. |
Keywords: | bicrystalline 1T/2H-MoS2 water splitting electronic interaction Z-scheme heterojunction H2O reactant adsorption |
Description: | Published: July 26, 2021 |
Rights: | © 2021 American Chemical Society |
DOI: | 10.1021/acsami.1c09651 |
Grant ID: | http://purl.org/au-research/grants/arc/DE210100253 |
Published version: | http://dx.doi.org/10.1021/acsami.1c09651 |
Appears in Collections: | Chemical Engineering publications |
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