Composition and Interface Engineering of Alloyed MoS2 x Se2(1- x ) Nanotubes for Enhanced Hydrogen Evolution Reaction Activity
| Autor: | Meihui Wu, Wen-Jing Jian, Zheng-Tian Shi, Junjun Zhang, Miao Jiang, Zhangru Xiao, Chun-Sing Lee, Jixue Li, Jun Xu |
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| Rok vydání: | 2016 |
| Předmět: |
Tafel equation
Interface engineering Materials science chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry Composition (combinatorics) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrogen adsorption 0104 chemical sciences Biomaterials Chalcogen chemistry Chemical engineering General Materials Science Hydrogen evolution 0210 nano-technology Carbon Biotechnology |
| Zdroj: | Small (Weinheim an der Bergstrasse, Germany). 12(32) |
| ISSN: | 1613-6829 |
| Popis: | Hierarchical MoS2 x Se2(1- x ) nanotubes assembled from several-layered nanosheets featuring tunable chalcogen compositions, expanded interlayer spacing and carbon modification, are synthesized for enhanced electrocatalytic hydrogen evolution reaction (HER). The chalcogen compositions of the MoS2 x Se2(1- x ) nanotubes are controllable by adjusting the selenization temperature and duration while the expanded (002) interlayer spacing varies from 0.98 to 0.68 nm. It is found that the MoS2 x Se2(1- x ) (x = 0.54) nanotubes with expanded interlayer spacing of 0.98 nm exhibit the highest electrocatalytic HER activity with a low onset potential of 101 mV and a Tafel slope of 55 mV dec(-1) . The improved electrocatalytic performance is attributed to the chalcogen composition tuning and the interlayer distance expansion to achieve benefitting hydrogen adsorption energy. The present work suggests a potential way to design advanced HER electrocatalysts through modulating their compositions and interlayer distances. |
| Databáze: | OpenAIRE |
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