The role of H-2 on the stability of the single-metal-site Ir-1/AC catalyst for heterogeneous methanol carbonylation
文献类型：期刊论文
| 作者 | Peng, SQ; Lin, XS; Song, XG; Liu, Y; Jiang, Z; Hemberger, P; Bodi, A; Ding, YJ |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2020 |
| 卷号 | 381页码:193-203 |
| ISSN号 | 0021-9517 |
| 关键词 | CATIVA(TM) PROCESS ATOM CATALYST ACTIVE-SITES ACETIC-ACID IRIDIUM CARBON CLUSTERS CO PRODUCTIVITY SPECTROSCOPY |
| DOI | 10.1016/j.jcat.2019.10.032 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Supported single-metal-site catalysts are well known for their 100% atom utilization efficiency, uniformly isolated active sites and well-defined coordination environment. Methanol carbonylation is a classic homogeneous reaction for acetic acid production. Here, we present the crucial role of H-2 on the stability of single-metal-site Ir-1/AC catalyst for heterogeneous methanol carbonylation. Metal leaching and carbon deposition are verified to be the main reasons of catalyst deactivation. Metal leaching is probably due to the formation of volatile [Ir(CO)(3)I] species, and carbon deposition is supposed to arise from the high energy barrier rate-determining step of CH3COI reductive elimination. However, hydrogenation of the surface intermediate species alleviates the carbon forming problem greatly and competitive adsorption of H-2 with CO on active species inhibits the formation of [Ir(CO)(3)I]. Consequently, H-2 is essential to avoid the activity decay of the Ir-1/AC catalyst. (C) 2019 Elsevier Inc. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/33199]  |
| 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.Jiaxing Univ, Sch Mat & Text Engn, Jiaxing, Zhejiang, Peoples R China 3.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai, Peoples R China 4.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai, Peoples R China 5.Paul Scherrer Inst, Lab Synchrotron Radiat & Femtochem, CH-5232 Villigen, Switzerland 6.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian, Peoples R China 7.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, SQ,Lin, XS,Song, XG,et al. The role of H-2 on the stability of the single-metal-site Ir-1/AC catalyst for heterogeneous methanol carbonylation[J]. JOURNAL OF CATALYSIS,2020,381:193-203. |
| APA | Peng, SQ.,Lin, XS.,Song, XG.,Liu, Y.,Jiang, Z.,...&Ding, YJ.(2020).The role of H-2 on the stability of the single-metal-site Ir-1/AC catalyst for heterogeneous methanol carbonylation.JOURNAL OF CATALYSIS,381,193-203. |
| MLA | Peng, SQ,et al."The role of H-2 on the stability of the single-metal-site Ir-1/AC catalyst for heterogeneous methanol carbonylation".JOURNAL OF CATALYSIS 381(2020):193-203. |
入库方式： OAI收割
来源：上海应用物理研究所
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