| Autor: |
Meerbach C; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany., Klemmed B; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany., Spittel D; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany., Bauer C; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany., Park YJ; Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea., Hübner R; Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany., Jeong HY; UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea., Erb D; Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328 Dresden, Germany., Shin HS; Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea., Lesnyak V; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany., Eychmüller A; Physical Chemistry, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany. |
| Abstrakt: |
The material-efficient monolayers of transition-metal dichalcogenides (TMDs) are a promising class of ultrathin nanomaterials with properties ranging from insulating through semiconducting to metallic, opening a wide variety of their potential applications from catalysis and energy storage to optoelectronics, spintronics, and valleytronics. In particular, TMDs have a great potential as emerging inexpensive alternatives to noble metal-based catalysts in electrochemical hydrogen evolution. Herein, we report a straightforward, low-cost, and general colloidal synthesis of various 2D transition-metal disulfide nanomaterials, such as MoS 2 , WS 2 , NiS x , FeS x , and VS 2 , in the absence of organic ligands. This new preparation route provides many benefits including relatively mild reaction conditions, high reproducibility, high yields, easy upscaling, no post-thermal annealing/treatment steps to enhance the catalytic activity, and, finally, especially for molybdenum disulfide nanosheets, high activity in the hydrogen evolution reaction. To underline the universal application of the synthesis, we prepared mixed Co x Mo 1- x S 2 nanosheets in one step to optimize the catalytic activity of pure undoped MoS 2 , which resulted in an enhanced hydrogen evolution reaction performance characterized by onset potentials as low as 134 mV and small Tafel slopes of 55 mV/dec. |
