دورية أكاديمية
Formation of polyhedral ceria nanoparticles with enhanced catalytic CO oxidation activity in thermal plasma via a hydrogen mediated shape control mechanism
| العنوان: | Formation of polyhedral ceria nanoparticles with enhanced catalytic CO oxidation activity in thermal plasma via a hydrogen mediated shape control mechanism |
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| المؤلفون: | Zheng, Jie, Zhang, Yaohua, Song, Xubo, Li, Xingguo |
| المساهمون: | Li, XG (reprint author), Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China., Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China. |
| المصدر: | SCI |
| بيانات النشر: | journal of nanoparticle research |
| سنة النشر: | 2011 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Ceria, Nanoparticles, Catalysis, Shape control, Thermal plasma processing, Synthesis, ULTRAFINE METAL PARTICLES, PHASE-FORMATION, GAS, NANOPOWDERS, NANORODS, BEHAVIOR, SIZE |
| الوصف: | Ceria nanoparticles with well defined facets are prepared in argon-hydrogen thermal plasma followed by controlled oxidation. With increasing hydrogen fraction in the plasma, a clear sphere-to-polyhedron shape transition is observed. The heat released during the hydrogenation of cerium, which significantly enhances the species mobility on the surface, favors the growth of well defined facets. The polyhedron ceria nanoparticles, though lower in specific surface area, exhibit superior catalytic performance for CO oxidation over the round particles, which is attributed to the higher density of the reactive {200} and {220} facets on the surface. The hydrogen mediated shape control mechanism provides new insights into the shape control of nanoparticles during thermal plasma processing. ; Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; SCI(E) ; 2 ; ARTICLE ; 10 ; 4445-4450 ; 13 |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 1388-0764 |
| العلاقة: | JOURNAL OF NANOPARTICLE RESEARCH.2011,13,(10),4445-4450.; 898761; http://hdl.handle.net/20.500.11897/151017Test; WOS:000295609700005 |
| DOI: | 10.1007/s11051-011-0527-4 |
| الإتاحة: | https://doi.org/20.500.11897/151017Test https://doi.org/10.1007/s11051-011-0527-4Test https://hdl.handle.net/20.500.11897/151017Test |
| رقم الانضمام: | edsbas.4B9F9DAF |
| قاعدة البيانات: | BASE |
| تدمد: | 13880764 |
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| DOI: | 10.1007/s11051-011-0527-4 |