Relationship between Hydrogen Evolution and Wettability for Multiscale Hierarchical Wrinkles
| Autor: | Hannes Jung, Geun-Tae Yun, Woo-Bin Jung, Yesol Kim, Minki Kim |
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| Rok vydání: | 2019 |
| Předmět: |
Work (thermodynamics)
Materials science Doping Binding energy 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Contact angle Transition metal General Materials Science Wetting Composite material 0210 nano-technology |
| Zdroj: | ACS applied materialsinterfaces. 11(7) |
| ISSN: | 1944-8252 |
| Popis: | Transition metal dichalcogenides (TMDs) are emerging two-dimensional materials with potential use for the hydrogen evolution reaction (HER) because they express a desired binding energy with protons. To date, TMD-based HER catalytic performance has been enhanced mostly by chemical modification, such as introducing defects, doping, and phase control. Herein, we enhanced the HER performance by precise control of wettability via hierarchical wrinkling. This hierarchical wrinkling confers tunability of the receding contact angle (2–30°) by controlling the wavelength of the hierarchical wrinkles. Minimization of the receding contact angle is directly related to overpotential reduction on the MoS2 wrinkles through gas detachment from the catalytic surface. Unlike in previous studies, in this work, we demonstrated the effect of wettability only without changing other parameters such as surface chemistry. We showed that our method can be applied to other TMD materials such as WS2. This study will contribute to fu... |
| Databáze: | OpenAIRE |
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