CO adsorption and correlation between CO surface coverage and activity/selectivity of preferential CO oxidation over supported Ag catalyst: an in situ FTIR study
文献类型：期刊论文
| 作者 | Qu, ZP; Zhou, ST; Wu, WC; Li, C; Bao, XH |
| 刊名 | catalysis letters
 |
| 出版日期 | 2005-05-01 |
| 卷号 | 101期号:1-2页码:21-26 |
| 关键词 | FTIR preferential CO oxidation silver catalyst CO coverage selectivity |
| 通讯作者 | 包信和 |
| 产权排序 | 1;1 |
| 英文摘要 | in situ ir measurements for co adsorption and preferential co oxidation in h-2-rich gases over ag/sio2 catalysts are presented in this paper. co adsorbed on the ag/sio2 pretreated with oxygen shows a band centered around 2169 cm(-1), which is assigned to co linearly bonded to ag+ sites. the amount of adsorbed co on the silver particles ( manifested by an ir band at 2169 cm(-1)) depends strongly on the co partial pressure and the temperature. the steady-state coverage on the ag surface is shown to be significantly below saturation, and the oxidation of co with surface oxygen species is probably via a non-competitive langmuir hinshelwood mechanism on the silver catalyst which occurs in the high-rate branch on a surface covered with co below saturation. a low reactant concentration on the ag surface indicates that the reaction order with respect to pco is positive, and the selectivity towards co2 decreases with the decrease of pco. on the other hand, the decrease of the selectivity with the reaction temperature also reflects the higher apparent activation energy for h-2 oxidation than that for co oxidation. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | carbon-monoxide oxidation ; low-temperature ; composite oxides ; silver catalyst ; h-2-rich gas ; kinetics ; spectroscopy ; oxygen |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000228549400004 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/93105]  |
| 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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany |
| 推荐引用方式 GB/T 7714 | Qu, ZP,Zhou, ST,Wu, WC,et al. CO adsorption and correlation between CO surface coverage and activity/selectivity of preferential CO oxidation over supported Ag catalyst: an in situ FTIR study[J]. catalysis letters,2005,101(1-2):21-26. |
| APA | Qu, ZP,Zhou, ST,Wu, WC,Li, C,&Bao, XH.(2005).CO adsorption and correlation between CO surface coverage and activity/selectivity of preferential CO oxidation over supported Ag catalyst: an in situ FTIR study.catalysis letters,101(1-2),21-26. |
| MLA | Qu, ZP,et al."CO adsorption and correlation between CO surface coverage and activity/selectivity of preferential CO oxidation over supported Ag catalyst: an in situ FTIR study".catalysis letters 101.1-2(2005):21-26. |
入库方式： OAI收割
来源：大连化学物理研究所
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