Synthesis of nanostructured Pt/CeO2-ZrO2-Al2O3 catalysts by a two-step sol-gel method
文献类型：期刊论文
| 作者 | Long, Qi; Cai, Mei; Rogers, Jerry D.; Rong, Huilin; Li, Jinru; Jiang, Long |
| 刊名 | NANOTECHNOLOGY
 |
| 出版日期 | 2007-09-05 |
| 卷号 | 18期号:35 |
| ISSN号 | 0957-4484 |
| DOI | 10.1088/0957-4484/18/35/355601 |
| 英文摘要 | Porous Pt/CeO2-ZrO2-Al2O3 catalysts were synthesized by a two-step sol-gel method in which noble metal nanoparticles were first prepared as a dispersed colloid in an aqueous medium, then mixed with aluminum isopropoxide ( AIP), Ce(NO3)(4) and Zr(NO3)(4), and condensed into a gel. After calcination at 800 degrees C for 3 h, these composite catalysts showed large specific surface areas ( 150-160 m(2) g(-1)) and a narrow pore size distribution of 10-12 nm as determined from the nitrogen adsorption/desorption isotherms. XPS and TEM scans showed that the active component of the catalyst was well dispersed, with the Pt nanoparticles ( particle size 3 -5 nm) confined to the pores. It was found that changing the template surfactants from ionic cetyltrimethylammonium bromide ( CTAB) to non-ionic polyethylene glycol P-1,1,3,3-tetramethylbutylphenyl ether ( TritonX-100) did not change either the specific surface area or the pore structure, but lowered the CO-to-CO2 reaction temperature by nearly 60 degrees C. Measurements of CO conversion proved that the catalyst prepared with TritonX-100 as the template had the highest catalytic activity: the onset of the conversion of CO to CO2 began at 158 degrees C and was complete at 192 degrees C. The possible mechanism of the anti-aggregation of nanoparticles and high catalyst activity has been discussed. |
| 语种 | 英语 |
| WOS记录号 | WOS:000249278300010 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/61851]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Long, Qi |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Key Lab Colloids & Surfaces, Beijing 100080, Peoples R China 2.GM Corp, Chem & Environm Sci Lab, Ctr Res & Dev, Warren, MI 48090 USA |
| 推荐引用方式 GB/T 7714 | Long, Qi,Cai, Mei,Rogers, Jerry D.,et al. Synthesis of nanostructured Pt/CeO2-ZrO2-Al2O3 catalysts by a two-step sol-gel method[J]. NANOTECHNOLOGY,2007,18(35). |
| APA | Long, Qi,Cai, Mei,Rogers, Jerry D.,Rong, Huilin,Li, Jinru,&Jiang, Long.(2007).Synthesis of nanostructured Pt/CeO2-ZrO2-Al2O3 catalysts by a two-step sol-gel method.NANOTECHNOLOGY,18(35). |
| MLA | Long, Qi,et al."Synthesis of nanostructured Pt/CeO2-ZrO2-Al2O3 catalysts by a two-step sol-gel method".NANOTECHNOLOGY 18.35(2007). |
入库方式： OAI收割
来源：化学研究所
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