Preparation and regeneration of supported single-Ir-site catalysts by nanoparticle dispersion via CO and nascent I radicals
文献类型：期刊论文
| 作者 | Feng, SQ; Hemberger, P; Bodi, A; Song, XG; Yu, TP; Jiang, Z; Liu, Y; Ding, YJ |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2020 |
| 卷号 | 382页码:347-357 |
| 关键词 | SURFACE ORGANOMETALLIC CHEMISTRY METHANOL CARBONYLATION HETEROGENEOUS CATALYSIS FAST PYROLYSIS IRIDIUM CHEMISORPTION REDISPERSION PARTICLES MECHANISM CLUSTERS |
| ISSN号 | 0021-9517 |
| DOI | 10.1016/j.jcat.2019.12.040 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Heterogeneous single-metal-site catalysts (HSMSCs) have been attracting increasing interest because of their unique traits. However, deactivation induced by metal agglomeration restrains the application especially when they have high metal loading. Herein, we present a method of CO/CH3I thermal treatment to prepare and regenerate Ir HSMSCs on activated carbon (AC) via atomically dispersive strategy of nanoparticles (NPs). The intermediate key species during this process, radicals, have been detected in situ by photoelectron photoion coincidence spectroscopy with vacuum ultraviolet synchrotron radiation (PEPICO-VUV). Our findings imply a strong relationship between I radicals' as well as CO molecule's roles in the breakage of NPs metal-metal bond. NPs with size larger than about 5 nm are difficult to be dispersed due to strong Ir-Ir bond together with the kinetic stability. Besides, 5 wt% Ir HSMSCs deactivated by metal agglomeration can be regenerated repeatedly and regain their initial activity for heterogeneous methanol carbonylation. (C) 2020 Elsevier Inc. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33077]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Paul Scherrer Inst, Lab Synchrotron Radiat & Fetntochem, CH-5232 Villigen, Switzerland 3.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 5.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, SQ,Hemberger, P,Bodi, A,et al. Preparation and regeneration of supported single-Ir-site catalysts by nanoparticle dispersion via CO and nascent I radicals[J]. JOURNAL OF CATALYSIS,2020,382:347-357. |
| APA | Feng, SQ.,Hemberger, P.,Bodi, A.,Song, XG.,Yu, TP.,...&Ding, YJ.(2020).Preparation and regeneration of supported single-Ir-site catalysts by nanoparticle dispersion via CO and nascent I radicals.JOURNAL OF CATALYSIS,382,347-357. |
| MLA | Feng, SQ,et al."Preparation and regeneration of supported single-Ir-site catalysts by nanoparticle dispersion via CO and nascent I radicals".JOURNAL OF CATALYSIS 382(2020):347-357. |
入库方式： OAI收割
来源：上海应用物理研究所
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