Atomically engineering activation sites onto metallic 1T-MoS
| Autor: | Yongge Wei, Xin He, Jun Hu, Yuanhui Sun, Sabrina Younan, Jier Huang, Xueli Zheng, Jingxuan Ge, Xingxu Yan, Brian Pattengale, Toshihiro Aoki, Xiaoqing Pan, Lijun Zhang, Jing Gu, Yi-Chao Huang, Ning Pu, Nicholas Williams, Wei Bian |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
inorganic chemicals Materials science Catalyst synthesis Science General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Overpotential Electrochemistry Electrocatalyst Two-dimensional materials 7. Clean energy General Biochemistry Genetics and Molecular Biology Article Catalysis 03 medical and health sciences lcsh:Science Hydrogen production Multidisciplinary General Chemistry 021001 nanoscience & nanotechnology Publisher Correction Nickel Hydrogen fuel 030104 developmental biology chemistry Chemical engineering Polyoxometalate lcsh:Q 0210 nano-technology Platinum Electrocatalysis |
| Zdroj: | Nature Communications Nature Communications, Vol 10, Iss 1, Pp 1-11 (2019) |
| ISSN: | 2041-1723 |
| Popis: | Engineering catalytic sites at the atomic level provides an opportunity to understand the catalyst’s active sites, which is vital to the development of improved catalysts. Here we show a reliable and tunable polyoxometalate template-based synthetic strategy to atomically engineer metal doping sites onto metallic 1T-MoS2, using Anderson-type polyoxometalates as precursors. Benefiting from engineering nickel and oxygen atoms, the optimized electrocatalyst shows great enhancement in the hydrogen evolution reaction with a positive onset potential of ~ 0 V and a low overpotential of −46 mV in alkaline electrolyte, comparable to platinum-based catalysts. First-principles calculations reveal co-doping nickel and oxygen into 1T-MoS2 assists the process of water dissociation and hydrogen generation from their intermediate states. This research will expand on the ability to improve the activities of various catalysts by precisely engineering atomic activation sites to achieve significant electronic modulations and improve atomic utilization efficiencies. While heterogeneous catalysts can act as tangible, efficient materials for energy conversion, understanding the active catalytic sites is challenging. Here, authors engineer specific catalytic sites into molybdenum sulfide to improve and elucidate hydrogen evolution electrocatalysis. |
| Databáze: | OpenAIRE |
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