Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde
文献类型：期刊论文
| 作者 | Chen, Dan1; Qu, Zhenping1; Shen, Shijin1; Li, Xinyong1; Shi, Yong1; Wang, Yi1; Fu, Qiang2; Wu, Jingjing2 |
| 刊名 | catalysis today
 |
| 出版日期 | 2011-10-25 |
| 卷号 | 175期号:1页码:338-345 |
| 关键词 | Support Ag based catalysts Formaldehyde TPD TPSR |
| ISSN号 | 待补充 |
| 产权排序 | 2,7 |
| 通讯作者 | zhenpingqu |
| 中文摘要 | comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde |
| 英文摘要 | temperature programmed desorption (tpd) and temperature programmed surface reaction (tpsr) were employed to study the hcho adsorption-desorption and the surface reaction on ag based catalysts supported on different supports (mcm-41, sba-15, nay, sio(2) and tio(2)). according to the analysis of xrd, uv-vis and h(2)-tpr for the as-prepared catalysts, there are four kinds of silver species on the supports, including metallic ag particles (ag(0)) with subsurface oxygen species, isolated ag(+) ions, well dispersed ag(2)o and ag(n)(delta+) clusters. moreover, the states, the dispersion and the amount of these silver species seem to be obviously different on different supports. no activity for hcho oxidation is observed on any supports, and silver particles with some oxygen in bulk were more active for the adsorption and activation of hcho. mcm-41 and sio(2) supported silver catalysts give new adsorption sites for hcho, and it is easily activated at lower temperatures and shows better surface reaction activity for hcho oxidation. the desorption temperature for hcho over sba-15 and nay supported silver catalysts is relatively higher, and its reaction performance is worse. however no surface reaction is observed on ag/tio(2) catalyst during experiments. it is also found that hcho molecular adsorbed on silver sites could be was oxidized into dioxymethylene (dom) and formate surface species, and they reacts with oxygen to form co(2) during tpsr. the activities of different silver based catalysts for hcho oxidation were closely related to their abilities for the formation of dom and formate species. (c) 2011 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 学科主题 | 物理化学 |
| 类目[WOS] | chemistry, applied ; chemistry, physical ; engineering, chemical |
| 研究领域[WOS] | chemistry ; engineering |
| 关键词[WOS] | subsurface oxygen ; alumina catalysts ; co oxidation ; ag catalysts ; ambient-temperature ; selective reduction ; room-temperature ; au catalysts ; methane ; surface |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000295735400048 |
| 公开日期 | 2012-07-09 |
| 源URL | [http://159.226.238.44/handle/321008/115501]  |
| 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.Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn MOE, Sch Environm Sci & Technol, Dalian 116024, Linggong, Peoples R China 2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Dan,Qu, Zhenping,Shen, Shijin,et al. Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde[J]. catalysis today,2011,175(1):338-345. |
| APA | Chen, Dan.,Qu, Zhenping.,Shen, Shijin.,Li, Xinyong.,Shi, Yong.,...&Wu, Jingjing.(2011).Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde.catalysis today,175(1),338-345. |
| MLA | Chen, Dan,et al."Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde".catalysis today 175.1(2011):338-345. |
入库方式： OAI收割
来源：大连化学物理研究所
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