115730-30-8Relevant articles and documents
Chemoselective reduction of quinoline over Rh-C60 nanocatalysts
Luo, Zhishan,Min, Yuanyuan,Nechiyil, Divya,Bacsa, Wolfgang,Tison, Yann,Martinez, Hervé,Lecante, Pierre,Gerber, Iann C.,Serp, Philippe,Axet, M. Rosa
, p. 6884 - 6898 (2019)
The design and engineering of heterogeneous nanocatalysts that are both highly active and selective for hydrogenation reactions constitute a crucial challenge. In that context, herein a series of Rh-C60 nanocatalysts have been synthesized via the decomposition of an organometallic rhodium complex in the presence of fullerene C60 under a H2 atmosphere. Rhodium atomically dispersed or rhodium nanoparticles on Rh-C60 spherical fulleride particles were produced by tuning the Rh/C60 molar ratio. Significant charge transfer between rhodium and C60 was evidenced through Raman and X-ray photoelectron spectroscopy, which indicates electron-deficient Rh species. The resulting heterostructured nanomaterials were applied successfully in the catalytic hydrogenation of quinoline, exhibiting excellent activity and producing selectively the partially hydrogenated product, 1,2,3,4-tetrahydroquinoline. Density functional theory (DFT) calculations show that the hydride coverage of the Rh NPs plays a key role in the adsorption modes of quinoline and 1,2,3,4-tetrahydroquinoline on the surface of the NPs, and that these adsorption modes are modulated by the presence of fullerene C60, thus affecting the activity and selectivity obtained with this rhodium based catalyst.
PRODUCTION METHOD OF CYCLIC COMPOUND
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Paragraph 0057; 0059; 0062-0063, (2021/05/05)
PROBLEM TO BE SOLVED: To provide an industrially simple production method of a cyclic compound. SOLUTION: A production method of a cyclic compound includes a step to obtain a reduced form (B) by reducing an unsaturated bond in a ring structure of an aromatic compound (A) by means of catalytic hydrogenation of the aromatic compound (A) or its salt using palladium carbon as a catalyst under a normal pressure, in which the aromatic compound (A) has one or more ring structures selected from a group consisting of a five membered-ring, a six membered-ring, and a condensed ring of the five membered-ring or the six membered-ring with another six membered-ring, a hetero atom can be included in the ring structure, and the aromatic compound (A) can have one or two side chains bonded to the ring structure and does not have any carbon-carbon triple bond in the side chain. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
A confined thermal transformation strategy to synthesize single atom catalysts supported on nitrogen-doped mesoporous carbon nanospheres for selective hydrogenation
Tian, Zhengbin,Wang, Guang-Hui,Wang, Wenquan,Zheng, Yan
, p. 25488 - 25494 (2021/12/07)
Carbon-supported single-atom catalysts (SACs) have brought considerable attention to heterogeneous catalysis, but they, however, often suffer from low activity due to the mass transfer limitation. Herein, we report a soft-templating method to synthesize core-shell mesostructured polymer nanospheres with metal nanoclusters (M-NCs, M = Pd, Pt) as the core, which can be easily converted into nitrogen-doped mesoporous carbon nanosphere (NMCS) supported SACs (M1/NMCS) after a confined thermal transformation process. Through this strategy, Pd1/NMCS and Pt1/NMCS are successfully prepared with rich porosity and high N content. The abundant N species in M1/NMCS can be employed as anchoring sites to capture and stabilize the single metal atoms. In addition, the mesoporous structure of M1/NMCS is beneficial for the mass transfer and the exposure of active sites. Benefiting from such a unique structure, the as-obtained Pd1/NMCS exhibits excellent activity, selectivity, and long-term stability in the selective hydrogenation of quinoline.
