Isotopic studies of Sn-Cr binary oxide catalysts for methane total oxidation
文献类型：期刊论文
| 作者 | Zhu, YX; Murwani, IK; Zhou, CJ; Kemnitz, E; Xie, YC |
| 刊名 | CATALYSIS LETTERS
 |
| 出版日期 | 2003-02-01 |
| 卷号 | 85期号:3-4页码:205-211 |
| 关键词 | O-18 Isotope Exchange Sn-cr Binary Oxide Methane Total Oxidation |
| ISSN号 | 1011-372X |
| 英文摘要 | A series of Sn-Cr binary oxide catalysts were prepared by a co-current co-precipitation method and tested for methane total oxidation. The binary oxide catalysts have much higher surface areas and catalytic activities for methane oxidation than pure SnO2. CrOx/SnO2 with a Cr/Sn atomic ratio of 3:7 displays the highest activity. Selected samples were subjected to temperature-programmed O-18 isotope-exchange measurements. Both complete and partial heteromolecular O-18 isotope exchange, as well as oxygen release, was observed for all catalysts. Reaction between CH4 and O-18(2) under static conditions was performed to investigate the reaction mechanism and it was found that the total oxidation of methane over Sn-Cr binary oxide catalysts occurs via a redox cycle with the chromium ion in a high oxidation state as the active center. Oxygen mobility of the catalyst plays an important role in the total oxidation of methane, but too high a mobility leads to very high oxygen release and a reduction of the surface reoxidability. This causes a decrease in the catalytic oxidation activity. |
| 语种 | 英语 |
| WOS记录号 | WOS:000180652000013 |
| 出版者 | KLUWER ACADEMIC/PLENUM PUBL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/79767]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhu, YX |
| 作者单位 | 1.Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China 2.Humboldt Univ, Inst Chem, D-12489 Berlin, Germany |
| 推荐引用方式 GB/T 7714 | Zhu, YX,Murwani, IK,Zhou, CJ,et al. Isotopic studies of Sn-Cr binary oxide catalysts for methane total oxidation[J]. CATALYSIS LETTERS,2003,85(3-4):205-211. |
| APA | Zhu, YX,Murwani, IK,Zhou, CJ,Kemnitz, E,&Xie, YC.(2003).Isotopic studies of Sn-Cr binary oxide catalysts for methane total oxidation.CATALYSIS LETTERS,85(3-4),205-211. |
| MLA | Zhu, YX,et al."Isotopic studies of Sn-Cr binary oxide catalysts for methane total oxidation".CATALYSIS LETTERS 85.3-4(2003):205-211. |
入库方式： OAI收割
来源：化学研究所
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