Atomistic Theory of Ostwald Ripening and Disintegration of Supported Metal Particles under Reaction Conditions
文献类型：期刊论文
| 作者 | Ouyang, Runhai; Liu, Jin-Xun; Li, Wei-Xue |
| 刊名 | journal of the american chemical society
 |
| 出版日期 | 2013-02-06 |
| 卷号 | 135期号:5页码:1760-1771 |
| 产权排序 | 1,1 |
| 通讯作者 | 李微雪 |
| 英文摘要 | understanding ostwald ripening and disintegration of supported metal particles under operating conditions has been of central importance in the study of sintering and dispersion of heterogeneous catalysts for long-term industrial implementation. to achieve a quantitative description of these complicated processes, an atomistic and generic theory taking into account the reaction environment, particle size and morphology, and metal-support interaction is developed. it includes (1) energetics of supported metal particles, (2) formation of monomers (both the metal adatoms and metal-reactant complexes) on supports, and (3) corresponding sintering rate equations and total activation energies, in the presence of reactants at arbitrary temperature and pressure. the thermodynamic criteria for the reactant assisted ostwald ripening and induced disintegration are formulated, and the influence of reactants on sintering kinetics and redispersion are mapped out. most energetics and kinetics barriers in the theory can be obtained conveniently by first-principles theory calculations. this allows for the rapid exploration of sintering and disintegration of supported metal particles in huge phase space of structures and compositions under various reaction environments. general strategies of suppressing the sintering of the supported metal particles and facilitating the redispersions of the low surface area catalysts are proposed. the theory is applied to tio2(110) supported rh particles in the presence of carbon monoxide, and reproduces well the broad temperature, pressure, and particle size range over which the sintering and redispersion occurred in such experiments. the result also highlights the importance of the metal-carbonyl complexes as monomers for ostwald ripening and disintegration of supported metal catalysts in the presence of co. |
| WOS标题词 | science & technology ; physical sciences |
| 学科主题 | 物理化学 |
| 类目[WOS] | chemistry, multidisciplinary |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | scanning-tunneling-microscopy ; oxide surfaces ; in-situ ; heterogeneous catalysis ; 2-dimensional islands ; induced dissociation ; model catalyst ; shape changes ; co oxidation ; nanoparticles |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000314794400029 |
| 公开日期 | 2013-10-11 |
| 源URL | [http://159.226.238.44/handle/321008/117685]  |
| 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 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ouyang, Runhai,Liu, Jin-Xun,Li, Wei-Xue. Atomistic Theory of Ostwald Ripening and Disintegration of Supported Metal Particles under Reaction Conditions[J]. journal of the american chemical society,2013,135(5):1760-1771. |
| APA | Ouyang, Runhai,Liu, Jin-Xun,&Li, Wei-Xue.(2013).Atomistic Theory of Ostwald Ripening and Disintegration of Supported Metal Particles under Reaction Conditions.journal of the american chemical society,135(5),1760-1771. |
| MLA | Ouyang, Runhai,et al."Atomistic Theory of Ostwald Ripening and Disintegration of Supported Metal Particles under Reaction Conditions".journal of the american chemical society 135.5(2013):1760-1771. |
入库方式： OAI收割
来源：大连化学物理研究所
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