2D PtS nanorectangles/g-C3N4 nanosheets with a metal sulfide–support interaction effect for high-efficiency photocatalytic H2 evolution

Bo Lin; Yao Zhou; Baorong Xu; Chao Zhu; Wu Tang; Yingchun Niu; Jun Di; Pin Song; Jiadong Zhou; Xiao Luo; Lixing Kang; Ruihuan Duan; Qundong Fu; Haishi Liu; Ronghua Jin; Chao Xue; Qiang Chen; Guidong Yang; Kalman Varga; Quan Xu; Yonghui Li; Zheng Liu; Fucai Liu

doi:10.1039/D0MH01693D

2D PtS nanorectangles/g-C₃N₄ nanosheets with a metal sulfide–support interaction effect for high-efficiency photocatalytic H₂ evolution†

Bo Lin,

‡^a Yao Zhou,‡^b Baorong Xu,^c Chao Zhu,^d Wu Tang,^e Yingchun Niu,^f Jun Di,^d Pin Song,

^d Jiadong Zhou,^d Xiao Luo,^a Lixing Kang,^d Ruihuan Duan,^d Qundong Fu,^d Haishi Liu,^a Ronghua Jin,

^c Chao Xue,

^g Qiang Chen,^h Guidong Yang,^c Kalman Varga,ⁱ Quan Xu,

*^f Yonghui Li,*^j Zheng Liu

*^d and Fucai Liu

*^a

Author affiliations

* Corresponding authors

^a School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
E-mail: fucailiu@uestc.edu.cn

^b School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore

^c XJTU-Oxford International Joint Laboratory for Catalysis, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China

^d School of Materials Science and Engineering, Nanyang Technological University, Singapore
E-mail: z.liu@ntu.edu.sg

^e School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China

^f State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing 102249, China
E-mail: xuquan@cup.edu.cn

^g State Centre for International Cooperation on Designer Low-carbon and Environmental Materials (CDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

^h School of Chemical Engineering and Technology, Sun Yat-sen University (Zhuhai Campus), Zhuhai 519082, China

ⁱ Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA

^j Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin 300350, China
E-mail: yonghui.li@tju.edu.cn

Abstract

Cocatalyst design is a key approach to acquire high solar-energy conversion efficiency for photocatalytic hydrogen evolution. Here a new in situ vapor-phase (ISVP) growth method is developed to construct the cocatalyst of 2D PtS nanorectangles (a length of ∼7 nm, a width of ∼5 nm) on the surface of g-C₃N₄ nanosheets. The 2D PtS nanorectangles/g-C₃N₄ nanosheets (PtS/CN) show an unusual metal sulfide–support interaction (MSSI), which is evidenced by atomic resolution HAADF-STEM, synchrotron-based GIXRD, XPS and DFT calculations. The effect of MSSI contributes to the optimization of geometrical structure and energy-band structure, acceleration of charge transfer, and reduction of hydrogen adsorption free energy of PtS/CN, thus yielding excellent stability and an ultrahigh photocatalytic H₂ evolution rate of 1072.6 μmol h⁻¹ (an apparent quantum efficiency of 45.7% at 420 nm), up to 13.3 and 1532.3 times by contrast with that of Pt nanoparticles/g-C₃N₄ nanosheets and g-C₃N₄ nanosheets, respectively. This work will provide a new platform for designing high-efficiency photocatalysts for sunlight-driven hydrogen generation.

Materials Horizons

2D PtS nanorectangles/g-C₃N₄ nanosheets with a metal sulfide–support interaction effect for high-efficiency photocatalytic H₂ evolution†

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2D PtS nanorectangles/g-C₃N₄ nanosheets with a metal sulfide–support interaction effect for high-efficiency photocatalytic H₂ evolution

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