Journal
ACS APPLIED ENERGY MATERIALS
Volume 5, Issue 7, Pages 8800-8811Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.2c01292
Keywords
photocatalytic hydrogen production; Pt/MoS2/g-C3N4 composites; metal-support interaction; charge separation and transfer; surface charge; visible light
Funding
- Key Research and Development Project of Anhui Province [2022l07020009]
- National Natural Science Foundation of China [22175183, 61774033]
- Presidential Foundation of Hefei Institutes of Physical Science, Chinese Academy of Sciences [YZJJZX202015, YZJJZX202019]
- Anhui Science and Technology Major Project [202103a05020014]
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In this study, ultrasmall fine Pt nanoparticles and MoS2 nanosheets were deposited on the surface of g-C3N4 as cocatalysts, which constructed effective charge separation and transfer channels and significantly enhanced the photocatalytic hydrogen activity.
Construction of effective charge separation and transfer channels is a critical issue in photocatalytic energy conversion. In this work, ultrasmall fine Pt nanoparticles and MoS(2 )nanosheets were deposited on the surface of g-C3N4 as cocatalysts. The presence of MoS2 can effectively induce the structural reconstruction of g-C3N4 and the redistribution of surface charges. The enriched electrons localized in the S and N atoms were conductive to the reduction of Pt4+ and the promotion of the metal- support interaction, thus boosting charge separation and transfer. As a result, the obtained Pt/MoS2/g-C3N4 composite provided a highly photocatalytic hydrogen activity, up to 1595.3 mu mol h(-1 )with an AQE of 30.9% at 435 nm, 87.6 times higher than g-C3N4. This work may provide some insights into the rational design of high-efficient composite photocatalysts for solar energy conversion.
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