One-dimensional Cu-based catalysts with layered Cu–Cu2O–CuO walls for the Rochow reaction

Li, Jing; Zhang, Zailei; Ji, Yongjun; Jin, Zheying; Shanying, Zou; Zhong, Ziyi; Su, Fabing

doi:10.1007/s12274-016-1033-x

Cited by 50 publications

(14 citation statements)

References 39 publications

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“…Among them, M2 is the most desired as it is the most important monomer used for the synthesis of the organosilicon polymers. Although many Cu-based catalysts have been reported to date [ 35–37 ], there is still room to improve the M2 selectivity and yield. It is expected that Zn 1 -Sn 1 /CuO with its unique structure might exhibit an outstanding catalytic property.…”

Section: Resultsmentioning

confidence: 99%

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Qiu

Chen

et al. 2019

National Science Review

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Single-atom catalysts are of great interest because they can maximize the atom-utilization efficiency and generate unique catalytic properties; however, much attention has been paid to single-site active components, rarely to catalyst promoters. Promoters can significantly affect the activity and selectivity of a catalyst, even at their low concentrations in catalysts. In this work, we designed and synthesized CuO catalysts with atomically dispersed co-promoters of Sn and Zn. When used as the catalyst in the Rochow reaction for the synthesis of dimethyldichlorosilane, this catalyst exhibited much-enhanced activity, selectivity and stability compared with the conventional CuO catalysts with promoters in the form of nanoparticles. Density functional theory calculations demonstrate that single-atomic Sn substitution in the CuO surface can enrich surface Cu vacancies and promote dispersion of Zn to its atomic levels. Sn and Zn single sites as the co-promoters cooperatively generate electronic interaction with the CuO support, which further facilitates the adsorption of the reactant molecules on the surface, thereby leading to the superior catalytic performance.

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Section: Resultsmentioning

confidence: 99%

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Qiu

Chen

et al. 2019

National Science Review

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“…photo voltaic) [27,28]. One cannot discount applications in catalysis as well, since surface of certain oxides of copper can be metallic [29,30]. Prior to this work, copper oxide QDs of radius ~4-5 nm have been reported by Yee-Fun Lim et al , s work based on solution approach [28].…”

Section: Introductionmentioning

confidence: 99%

Ultra-small (r<2 nm), stable (>1 year) copper oxide quantum dots with wide band gap

Talluri

Prasad

Thomas

2018

Superlattices and Microstructures

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Ultra-small (r<2 nm) semiconductor quantum dots (QDs) have attracted attention for applications ranging from dye sensitized solar cells to sensing due to its tunable electronic structure and band gap, and large specific surface area. However obtaining monodisperse QDs and stabilization in this size regime remains a challenge. A recent report on digestive ripening of an oxide system showed substantial promise in addressing these requirements of QDs. In this work, we report a green solution, soft chemical (chimie douce) approach for synthesis of quasi-spherical, ultra-small, stable, and monodispersed copper oxide QDs (r<2 nm) based on digestive ripening (DR). It may be noted this is only the second transition metal oxide system in which DR is reported so far. DR involves the refluxing of polydispersed colloidal nanoparticles in the presence of surface active agents (e.g. triethanolamine (TEA)) that leads to fairly monodispersed nanoparticles. It has been noticed that capping with TEA results in reduction in the average particle diameter from 6 ± 4 nm to 2.4 ± 0.5 nm and an increase of zeta potential (ξ) from +12±2 mV to +31±2 mV. These copper oxide QDs are monodispersed (size ~ 2.4±0.5 nm), and stable (>1 year). In addition, these quantum dots show an anomalous increase in band gap (5.3 eV), inexplicable using Brus' equation. XPS indicates that Cu exists in mixed valence state in this material. Based on our observations, we suggest that offstoichiometry in copper oxide, which is seemingly substantial at these length scales, is responsible for the observed anomaly in band gap.

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“…80 years after the independent discovery by R. Müller and E. G. Rochow, the direct synthesis reaction, given in eqn (1), remains the most common method for the synthesis of organosilicon compounds. [1][2][3][4][5][6][7] Si(s) + 2CH 3 Cl(s) → (CH 3 ) 2 SiCl 2 (g) (1) It is an important industrial process with a high amount of silicones produced per year (2.4 million metric tons in 2019) 8 with major applications such as construction, electronics, transportation, medical, personal care and others. 5 Therefore, the optimization of the silicones production via the increase in production yield is crucial as well as better energy efficiency and raw materials utilization and lower greenhouse gas emissions.…”

Section: Introductionmentioning

confidence: 99%

Catalytic cracking of CH₃Cl on copper-based phases

Blaser

Rosier

Huet

et al. 2022

Catal. Sci. Technol.

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One-dimensional Cu-based catalysts with layered Cu–Cu2O–CuO walls for the Rochow reaction

Cited by 50 publications

References 39 publications

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Ultra-small (r<2 nm), stable (>1 year) copper oxide quantum dots with wide band gap

Catalytic cracking of CH₃Cl on copper-based phases

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One-dimensional Cu-based catalysts with layered Cu–Cu2O–CuO walls for the Rochow reaction

Cited by 50 publications

References 39 publications

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Single-atom Sn-Zn pairs in CuO catalyst promote dimethyldichlorosilane synthesis

Ultra-small (r<2 nm), stable (>1 year) copper oxide quantum dots with wide band gap

Catalytic cracking of CH3Cl on copper-based phases

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Catalytic cracking of CH₃Cl on copper-based phases