دورية أكاديمية
Nanocrystalline intermetallics on mesoporous carbon for direct formic acid fuel cell anodes
| العنوان: | Nanocrystalline intermetallics on mesoporous carbon for direct formic acid fuel cell anodes |
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| المؤلفون: | Ji, Xiulei, Lee, Kyu Tae, Holden, Reanne, Zhang, Lei, Zhang, Jiujun, Botton, Gianluigi A., Couillard, Martin, Nazar, Linda F. |
| بيانات النشر: | NATURE PUBLISHING GROUP |
| سنة النشر: | 2010 |
| المجموعة: | ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) |
| مصطلحات موضوعية: | BISMUTH-MODIFIED PT(111), ELECTROCATALYTIC ACTIVITY, PLATINUM NANOPARTICLES, BOROHYDRIDE REDUCTION, CATALYTIC-PROPERTIES, OXIDATION, METHANOL, ELECTROOXIDATION, ELECTRODES, PTBI |
| الوصف: | Shape-and size-controlled supported metal and intermetallic nanocrystallites are of increasing interest because of their catalytic and electrocatalytic properties. In particular, intermetallics PtX (X=Bi, Pb, Pd, Ru) are very attractive because of their high activity as fuel-cell anode catalysts for formic acid or methanol oxidation. These are normally synthesized using high-temperature techniques, but rigorous size control is very challenging. Even low-temperature techniques typically produce nanoparticles with dimensions much greater than the optimum 6 nm required for fuel cell catalysis. Here, we present a simple and robust, chemically controlled process for synthesizing size-controlled noble metal or bimetallic nanocrystallites embedded within the porous structure of ordered mesoporous carbon (OMC). By using surface-modified ordered mesoporous carbon to trap the metal precursors, nanocrystallites are formed with monodisperse sizes as low as 1.5nm, which can be tuned up to ???3.5nm. To the best of our knowledge, 3-5 nm ordered mesoporous carbon-supported PtBi nanoparticles exhibit the highest mass activity for formic acid oxidation reported to date, and over double that of Pt-Au. ; close ; 146 ; 122 |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1755-4330 |
| العلاقة: | NATURE CHEMISTRY, v.2, no.4, pp.286 - 293; https://scholarworks.unist.ac.kr/handle/201301/6710Test; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77950295284Test; 1071; 16385; 2-s2.0-77950295284; 000275928300015 |
| DOI: | 10.1038/nchem.553 |
| الإتاحة: | https://doi.org/10.1038/nchem.553Test https://scholarworks.unist.ac.kr/handle/201301/6710Test http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77950295284Test |
| رقم الانضمام: | edsbas.9C34BC81 |
| قاعدة البيانات: | BASE |
| تدمد: | 17554330 |
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| DOI: | 10.1038/nchem.553 |