光催化
材料科学
X射线光电子能谱
金属
带隙
硫化物
量子效率
纳米颗粒
纳米技术
化学工程
光电子学
催化作用
化学
冶金
生物化学
工程类
作者
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,K. Varga,Quan Xu,Yonghui Li,Zheng Liu,Fucai Liu
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:8 (2): 612-618
被引量:33
摘要
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.
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