CO Oxidation Catalyzed by Au-Ag Bimetallic Nanoparticles Supported in Mesoporous Silica
文献类型：期刊论文
| 作者 | Yen, Chun-Wan1,2; Lin, Meng-Liang1,2; Wang, Aiqin1,2,3; Chen, Shin-An4; Chen, Jin-Ming4; Mou, Chung-Yuan1,2 |
| 刊名 | journal of physical chemistry c
 |
| 出版日期 | 2009-10-15 |
| 卷号 | 113期号:41页码:17831-17839 |
| 产权排序 | 2;3 |
| 通讯作者 | chung-yuan mou |
| 英文摘要 | we report a novel au-ag bimetallic nanocatalyst supported on an acidic mesoporous aluminosilicate au-ag@apts-mcm prepared by a two-step synthesis procedure, which is very active for low-temperature co oxidation, its catalytic activity is still quite appreciable after 1 year of storage under room conditions. the silane apts [h2n(ch2)(3)-si(ome)(3)] was used to surface functionalize mesoporous silica. the functionalized mesoporous silica was used to absorb the gold precursor aucl(4)(-) and silver precursor agno3 to form gold-silver bimetallic nanoparticles inside the nanochannels after chemical reduction. the catalysts were activated by calcinations, followed with hydrogen reduction at 873 k. using various characterization techniques, such as x-ray diffraction, uv-vis, transmission electrom microscopy, and x-ray absorption fine structure spectroscopy (exafs), we elucidated the structure and surface compositions. as compared with the previously reported au-ag@mcm, prepared by one-pot procedure, the new method yields smaller sizes of auag bimetallic nanoparticles (4-6 vs 20 nm). they exhibited higher activity in catalysis for low-temperature co oxidation with high stability. moreover, the catalyst is resistant to moisture over a long storage time. a synergetic effect in relative composition was also found. the exafs study shows that ag predominantly resides on the surface of the bimetallic nanoparticle. this distribution helps to yield a catalyst that is very active in both co and o-2 neighboring sites. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; science & technology - other topics ; materials science |
| 关键词[WOS] | gas shift reaction ; ray-absorption-spectroscopy ; carbon-monoxide oxidation ; vapor-phase epoxidation ; gold catalysts ; alloy nanoparticles ; high conversion ; pretreatment ; h-2 ; hydrogenation |
| 收录类别 | SCI |
| 原文出处 | false |
| 语种 | 英语 |
| WOS记录号 | WOS:000270459900038 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/102825]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan 2.Natl Taiwan Univ, Ctr Condensed Matter Res, Taipei 106, Taiwan 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 4.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan |
| 推荐引用方式 GB/T 7714 | Yen, Chun-Wan,Lin, Meng-Liang,Wang, Aiqin,et al. CO Oxidation Catalyzed by Au-Ag Bimetallic Nanoparticles Supported in Mesoporous Silica[J]. journal of physical chemistry c,2009,113(41):17831-17839. |
| APA | Yen, Chun-Wan,Lin, Meng-Liang,Wang, Aiqin,Chen, Shin-An,Chen, Jin-Ming,&Mou, Chung-Yuan.(2009).CO Oxidation Catalyzed by Au-Ag Bimetallic Nanoparticles Supported in Mesoporous Silica.journal of physical chemistry c,113(41),17831-17839. |
| MLA | Yen, Chun-Wan,et al."CO Oxidation Catalyzed by Au-Ag Bimetallic Nanoparticles Supported in Mesoporous Silica".journal of physical chemistry c 113.41(2009):17831-17839. |
入库方式： OAI收割
来源：大连化学物理研究所
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