Controllable Synthesis and Catalytic Performance of Nanocrystals of Rare-Earth-Polyoxometalates
| Autor: | Xiaoge Feng, Jie Zhang, Xuenian Chen, Ruoya Wang, Nana Ma, Shuxia Liu, Zhiping Zheng, Shujun Li, Xiaoming Ma, Qingpo Peng, Yanfang Zhou, Yi Chang |
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| Rok vydání: | 2018 |
| Předmět: |
Rare earth
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Ion Catalysis Inorganic Chemistry chemistry.chemical_compound Monomer chemistry Chemical engineering Nanocrystal Lewis acids and bases Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Inorganic chemistry. 57(11) |
| ISSN: | 1520-510X |
| Popis: | Large-scale isolation of nanocrystals of rare-earth-polyoxometalates (RE-POMs) catalysts is important in fundamental research and applications. Here, we synthesized a family of monomeric RE-POMs by the self-assembly of Ta/W mixed-addendum POM {P2W15Ta3O62} and rare-earth (RE) ions. These RE-POMs with molecular formulas of [RE(H2O)7]3P2W15Ta3O62·nH2O (RE = Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) are all electroneutral molecular clusters, insoluble in water and common organic solvents. The electronic structures, electrochemical properties, and catalytic activities of them have been investigated by experimental and computational methods. In particular, based on a mild and controllable synthetic process, a convenient and controllable approach to prepare nanocrystals and self-organized aggregates of these monomers has been developed. They exhibit remarkable heterogeneous catalytic activity for cyanosilylation. Both the increased Lewis acid strength of RE in the title compounds, as indicated by theoretical c... |
| Databáze: | OpenAIRE |
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