Protruding Pt single-sites on hexagonal ZnIn2S4 to accelerate photocatalytic hydrogen evolution

Xiaowei Shi, Chao Dai, Xin Wang, Jiayue Hu, Junying Zhang, Lingxia Zheng, Liang Mao (), Huajun Zheng () and Mingshan Zhu ()
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Xiaowei Shi: Zhejiang University of Technology
Chao Dai: Zhejiang University of Technology
Xin Wang: Zhejiang University of Technology
Jiayue Hu: Jinan University
Junying Zhang: Beihang University
Lingxia Zheng: Zhejiang University of Technology
Liang Mao: China University of Mining and Technology
Huajun Zheng: Zhejiang University of Technology
Mingshan Zhu: Jinan University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Single-site cocatalysts engineered on supports offer a cost-efficient pathway to utilize precious metals, yet improving the performance further with minimal catalyst loading is still highly desirable. Here we have conducted a photochemical reaction to stabilize ultralow Pt co-catalysts (0.26 wt%) onto the basal plane of hexagonal ZnIn2S4 nanosheets (PtSS-ZIS) to form a Pt-S3 protrusion tetrahedron coordination structure. Compared with the traditional defect-trapped Pt single-site counterparts, the protruding Pt single-sites on h-ZIS photocatalyst enhance the H2 evolution yield rate by a factor of 2.2, which could reach 17.5 mmol g−1 h−1 under visible light irradiation. Importantly, through simple drop-casting, a thin PtSS-ZIS film is prepared, and large amount of observable H2 bubbles are generated, providing great potential for practical solar-light-driven H2 production. The protruding single Pt atoms in PtSS-ZIS could inhibit the recombination of electron-hole pairs and cause a tip effect to optimize the adsorption/desorption behavior of H through effective proton mass transfer, which synergistically promote reaction thermodynamics and kinetics.

Date: 2022
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DOI: 10.1038/s41467-022-28995-1

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