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An XAFS study on the specific microstructure of active species in iron titanate catalyst for NH3-SCR of NOx
| Title: | An XAFS study on the specific microstructure of active species in iron titanate catalyst for NH3-SCR of NOx |
| Authors: | Liu, Fudong Browse this author | | Asakura, Kiyotaka Browse this author →KAKEN DB | | Xie, Pengyang Browse this author | | Wang, Jianguo Browse this author | | He, Hong Browse this author |
| Keywords: | Iron titanate catalyst | | Selective catalytic reduction | | Environmental-friendly | | XANES | | EXAFS | | Electronic inductive effect |
| Issue Date: | 1-Mar-2013 |
| Publisher: | Elsevier B.V. |
| Journal Title: | Catalysis Today |
| Volume: | 201 |
| Start Page: | 131 |
| End Page: | 138 |
| Publisher DOI: | 10.1016/j.cattod.2012.03.062 |
| Abstract: | Environmental-friendly iron titanate (FeTiOx) catalyst is a potential candidate for the substitution of conventional V2O5-WO3 (MoO3)/TiO2 catalyst for the selective catalytic reduction of NOx with NH3 (NH3-SCR) for the NOx elimination from stationary and mobile sources for environmental protection. To understand in-depth the nature of active structure in this FeTiOx catalyst for further catalyst redesign and activity improvement, the study of X-ray absorption near-edge spectroscopy (XANES) and extended X-ray absorption fine-structure spectroscopy (EXAFS) combined with theoretical calculation is carefully performed. Different from the crystal structure of hematite Fe2O3, homogeneous edge shared Fe3+ -(O)2-Ti4+ structure in FeTiOx catalyst prepared from Ti(SO4)2 precursor is obviously formed with crystallite phase, which shows the electronic inductive effect between Fe3+ and Ti4+ species, resulting in the high NO adsorption and oxidation ability of Fe3+ species and thus high catalytic activity and N2 selectivity in the NH3-SCR reaction. In the future study, this specific edge shared Fe3+-(O)2-Ti4+ structure can be stabilized onto certain catalyst supports with large surface area for practical use, such as the catalytic removal of NOx from flue gas and diesel engine exhaust. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/52113 |
| Appears in Collections: | 触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 朝倉 清高
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