期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 220, 期 -, 页码 379-385出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2017.08.035
关键词
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资金
- National Nature Science Foundation of China [21476097, 21776118]
- U.S. Air Force BRI Grant [FA9550-14-1-0268]
- Six talent peaks project in Jiangsu Province [2014-JNHB-014]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Efficient separation of hole-electron pair plays a crucial role in enhancing photocatalytic water splitting activity, which essentially requires a noble metal co-catalyst. Here we report that two-dimensional (2D) metallic 1T-MoS2 can exceed the performance of noble metal like Pt as a co-catalyst in assisting the photocatalytic hydrogen evolution over 2D semiconductor such as oxygenated monolayer graphitic carbon nitride (O-g-C3N4). The abundance of intrinsic active site for hydrogen evolution reaction for 1T-MoS2 partly contributes to the outstanding performance of 1T-MoS2/O-g-C3N4 system. More importantly, the 2D heterostructure junction of 2D metals-2D semiconductor through van der Waals interaction minimizes the Schottky barrier, which in turn improves the charge transfer efficiency. The optimal 1T-MoS2/O-g-C3N4 exhibited H-2 evolution rate as high as similar to 1841.72 mu mol/g/h, an external quantum efficiency of similar to 7.11% at lambda = 420 nm, and a super high TOF of 156.6 h(-1).
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