文献类型：期刊文献

英文题名：Thermoregulated Ionic Liquid-Stabilizing Ru/CoO Nanocomposites for Catalytic Hydrogenation

作者：Chen, Manyu[1];Cui, Yan[2];Qian, Wei[1];Peng, Qingpo[1];Wang, Jiajia[1];Gong, Honghui[1];Fang, Jian[1];Dai, Sheng[2];Hou, Zhenshan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Adv Mat & Feringa Nobel Prize Scientist J, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2020

卷号：36

期号：39

起止页码：11589

外文期刊名：LANGMUIR

收录：;EI(收录号：20204509462108);WOS:【SCI-EXPANDED(收录号:WOS:000580427900020)】；

基金：This work was financially supported by the National Natural Science Foundation of China (nos. 21773061 and 21978095). S.D. acknowledges the support by the Shanghai Rising-star Program (20QA1402400). Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Amines - Scanning electron microscopy - Hydrogenation - Molar ratio - Nuclear magnetic resonance - Nuclear magnetic resonance spectroscopy - Chemical industry - Cobalt compounds - Nanocomposites - Nanocatalysts - Phenols - X ray photoelectron spectroscopy - Ionic liquids - Mass spectrometry - Phase separation - Ruthenium compounds

摘要：Catalytic hydrogenations represent fundamental processes and allow for atom-efficient and clean functional group transformations for the production of chemical intermediates and fine chemicals in chemical industry. Herein, the Ru/CoO nanocomposites have been constructed and applied as nanocatalysts for the hydrogenation of phenols and furfurals into the corresponding cyclohexanols and tetrahydrofurfuryl alcohols, respectively. The functionalized ionic liquid acted not only as a ligand for stabilizing the Ru/CoO nanocatalyst but also as a thermoregulated agent. The as-obtained nanocatalyst showed superior activity, and it could be conveniently recovered via the thermoregulating phase separation. In six recycle experiments, the catalysts maintained excellent performance. It was observed that the catalytic performance highly hinged on the molar ratio of Ru to Co in the nanocatalyst. The catalyst characterization was carried out by high-resolution transmission electron microscopy (HRTEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray photoelectron spectroscopy, X-ray diffraction, high-resolution mass spectrometry, Fourier transform infrared, nuclear magnetic resonance, and UV-vis. Especially, the characterization by HRTEM and HAADF-STEM images of the nanocatalyst demonstrated that Ru(0) and Co(II) species were distributed uniformly and the Ru and Co(II) species were close to each other. However, Co(0) was generated and an electronic transfer from Co to Ru species could occur under the hydrogenation conditions. The C-13 NMR characterization indicated further that Co(II) sites were mainly responsible for phenol adsorption. Meanwhile, the adjacent electron-rich Ru(0) sites can promote H-2 dissociation and favor for the sequential hydrogenation.