Highly crystalline PtCu nanotubes with three dimensional molecular accessible and restructured surface for efficient catalysis
| العنوان: | Highly crystalline PtCu nanotubes with three dimensional molecular accessible and restructured surface for efficient catalysis |
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| المؤلفون: | Shu-Hong Yu, Ya-Rong Zheng, Liang Xu, Qi-Qi Fu, Si-Yue Ma, Xiaojing Liu, Hui-Hui Li |
| المصدر: | Energy & Environmental Science. 10:1751-1756 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Hydrogen, Renewable Energy, Sustainability and the Environment, Chemistry, chemistry.chemical_element, Nanoparticle, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Pollution, Redox, 0104 chemical sciences, Catalysis, Solvent, chemistry.chemical_compound, Nuclear Energy and Engineering, Chemical engineering, Environmental Chemistry, Methanol, 0210 nano-technology, Methanol fuel |
| الوصف: | Direct methanol fuel cells (DMFCs) as candidates for dominant energy conversion devices based on the higher energy densities of liquid methanol show unique advantages over hydrogen-based fuel cells, such as cheapness and ease of storage and transportation. However, the fundamental challenges for electrochemical oxidation of methanol are the sluggish electro-oxidation kinetics and recovery of Pt surfaces to lower costs. Here, we report a mixed solvent strategy to prepare a highly active and durable class of electrocatalysts with connected single crystalline nanoparticles (NPs), forming an open architecture. Each single crystalline NP along PtCu nanotubes (NTs) can be considered as a highly active unit with specific facet and assembles along one-dimensional (1D) direction. The Pt1Cu1–AA NTs achieve a factor of 5.5 and 10.3 enhancement in mass activity (2252 mA mg−1) and specific activity (6.09 mA cm−2) for methanol oxidation reaction (MOR) relative to Pt/C catalysts, respectively. Moreover, after long-term stability tests, the activity of the NTs could be recovered via a simple potential cycling process (reactivation process) to the initial value or better. Thus this kind of catalysts would limit the costs to the initial investment and recovery and show potential possibility in real DMFC devices. |
| تدمد: | 1754-5706 1754-5692 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5d5ea6e7cee6fb8b6efdaa99e76444d2 https://doi.org/10.1039/c7ee00573c |
| رقم الأكسشن: | edsair.doi...........5d5ea6e7cee6fb8b6efdaa99e76444d2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17545706 17545692 |
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