Fig. 1.
(Color online) Schematic illustration of the OM-assisted synthesis process and the structural evolution of CZTS nanocrystals.
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| Citation: |
Yu Li, Shuaibing Wang, Jie Chen, Ouyang Lin, Zhe Yin, Chunhe Yang, Aiwei Tang. From kesterite 2D nanosheets to wurtzite 1D nanorods: controllable synthesis of Cu−Zn−Sn−S and their application in electrocatalytic hydrogen evolution[J]. Journal of Semiconductors, 2023, 44(12): 122701. doi: 10.1088/1674-4926/44/12/122701
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Y Li, S B Wang, J Chen, O Y Lin, Z Yin, C H Yang, A W Tang. From kesterite 2D nanosheets to wurtzite 1D nanorods: controllable synthesis of Cu−Zn−Sn−S and their application in electrocatalytic hydrogen evolution[J]. J. Semicond, 2023, 44(12): 122701. doi: 10.1088/1674-4926/44/12/122701
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From kesterite 2D nanosheets to wurtzite 1D nanorods: controllable synthesis of Cu−Zn−Sn−S and their application in electrocatalytic hydrogen evolution
DOI: 10.1088/1674-4926/44/12/122701
More Information
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Yu Li received his BS degree in chemical engineering and technology in 2018 from Taiyuan University of Science and Technology, China, and his MS degree in chemical engineering in 2021 from Yanshan University, China. Currently, he is pursuing a PhD in optical engineering at Beijing Jiaotong University. His research interests are in the controllable fabrication of multinary copper-based chalcogenide nanocrystals and the study of photoelectric performance -
Aiwei Tang is a full professor at the School of Physical Science and Engineering in Beijing Jiaotong University. He received his PhD degree from Beijing Jiaotong University in 2009. He then spent two years at the Institute of Semiconductors at the Chinese Academy of Sciences as a postdoctoral researcher. He joined Beijing Jiaotong University in 2011. His recent research interests are mainly focused on synthesis, functionalization and optical properties of low-dimensional semiconductor nanocrystals and their applications in light-emitting diodes and energy storage and conversion - Corresponding author: awtang@bjtu.edu.cn
- Revised Date: 2023-07-14 Available Online: 2023-09-07
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Abstract
As typical quarternary copper-based chalcogenides, Cu–Zn–Sn–S nanocrystals (CZTS NCs) have emerged as a new-fashioned electrocatalyst in hydrogen evolution reactions (HERs). Oleylamine (OM), a reducing surfactant and solvent, plays a significant role in the assisting synthesis of CZTS NCs due to the ligand effect. Herein, we adopted a facile one-pot colloidal method for achieving the structure evolution of CZTS NCs from 2D nanosheets to 1D nanorods assisted through the continuous addition of OM. During the process, the mechanism of OM-induced morphology evolution was further discussed. When merely adding pure 1-dodecanethiol (DDT) as the solvent, the CZTS nanosheets were obtained. As OM was gradually added to the reaction, the CZTS NCs began to grow along the sides of the nanosheets and gradually shrink at the top, followed by the formation of stable nanorods. In acidic electrolytic conditions, the CZTS NCs with 1.0 OM addition display the optimal HER activity with a low overpotential of 561 mV at 10 mA/cm2 and a small Tafel slope of 157.6 mV/dec compared with other CZTS samples. The enhancement of HER activity could be attributed to the contribution of the synergistic effect of the diverse crystal facets to the reaction. -
References
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