Controllably oxidized copper flakes as multicomponent copper-based catalysts for the Rochow reaction

Liu, Shaomian; Wang, Yingli; Zhu, Yongchun; Wang, Guangna; Zhang, Zailei; Che, Hongwei; Jia, Lei; Su, Fabing

doi:10.1039/c3ra46970k

Cited by 19 publications

(5 citation statements)

References 42 publications

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“…Liu et al reported a kind of ternary‐phase nanoparticles with the optimum weight proportion of 18.1: 53.0: 28.9 (Cu: Cu 2 O: CuO), which achieved 74.5 % of M2 selectivity and 23.4 % of Si conversion . What's more, the Cu‐based flakes composed of Cu−Cu 2 O−CuO with a weight ratio of 28: 41: 31 were reported to reach a high catalytic performance of 82.3 % M2 selectivity and 32.5 % Si conversion . However, the detailed synergetic interaction among Cu, Cu 2 O and CuO is still unclear.…”

Section: Chemistry: State‐of‐the‐artmentioning

confidence: 99%

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

et al. 2019

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The Rochow‐Müller process, an old process that has been known for more than seventy years, is for the direct synthesis of methylchlorosilane. However, due to its unique economic efficiency, it is still extremely important in silicone industry, e. g., about 90 % of starting materials for producing silicones are obtained by this route. Although significant progress has been made in exploring high‐efficient catalysts and understanding its mechanism, a quantitative description of this reaction is still far‐fetched due to its high complexity. In addition, sustainable use and recycling of by‐products and waste solid have become imperative nowadays due to the increasing demands for atom economy and environmental protection. This paper provides a comprehensive overview and insights into Rochow‐Müller process from its catalysis to sustainable issues, including the catalyst development and reaction mechanism investigation, waste reutilization and their derived products. In addition, several emerging novel processes originated from Rochow‐Müller process are summarized. Lastly, challenges and perspectives with respect to this reaction are discussed. We hope this work has accurately reflected and recorded the transition of Rochow‐Müller process to modern molecular catalysis, and can promote a much more sustainable silicone industry.

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Section: Chemistry: State‐of‐the‐artmentioning

confidence: 99%

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

et al. 2019

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“…The unique properties of metal nanoparticles and ne particles provide possible new product developments. [1][2][3][4] At present, nanotechnology is a technology that cuts across different boundaries, including use in construction and composite materials, 5 as catalysts, [6][7][8][9] antibacterial coatings, 10,11 biosensors, 12 plasmonic photo devices, 13 and electrical devices, [14][15][16][17][18][19] in addition to some consumer products. The steady increase in nanoparticle and ne particle use is accompanied with larger production, requiring development of the handling and processing of such materials.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature nanoredox two-step sintering of gelatin nanoskin-stabilized submicrometer-sized copper fine particles for preparing highly conductive layers

2015

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A conductive paste was prepared with submicrometer-sized copper fine particles that were coated by a gelatin nanoskin. The average particle size was ca. 130 nm. After drying, an oxidation-reduction two-step sintering process was proposed for these submicrometer-sized copper fine particles to obtain low-resistivity layers at a very low temperature. The optimized conditions gave a low resistivity of 8.2 x 10(-6) Omega cm, even when the particles were covered by a common polymer. Our results suggest that the formation of the small copper oxide prominences on the surface of the copper fine particles could be reduced at low temperatures, forming connected submicrometer-sized metallic copper particles

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“…29,30 In general, the Cu-based catalysts are mixed with Zn or ZnO promoters both in the organosilane industry and in fundamental studies. In the past ve years, our group has studied the Cu, 31 Cu 2 O, 32,33 Cu@Cu 2 O, 34 CuO, 35,36 Cu-Cu 2 O-CuO composites, 37,38 and CuCl 39 as active components for this reaction, and found that the catalyst composition, structure, size, and shape have signicant effect on it. However, the above catalysts still suffer from low Si conversion, limiting their practical application.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect in bimetallic copper–silver (Cu_xAg) nanoparticles enhances silicon conversion in Rochow reaction

Zhang

et al. 2015

RSC Adv.

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The oleylamine thermal reduction process was employed to prepare bimetallic copper-silver (Cu x Ag (0 # x # 50)) nanoparticles, such as Cu, Cu 50 Ag, Cu 20 Ag, Cu 10 Ag, Cu 5 Ag, CuAg, CuAg 2 , and Ag, by using Cu(CH 3 COO) 2 and AgNO 3 as the precursors. The samples were characterized by X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The Cu x Ag hybrid nanostructure showed good particle dispersion, and Cu and Ag metals were well mixed. The catalytic properties of these bimetallic Cu x Ag nanoparticles as model catalysts for the Rochow reaction were explored. Compared to monometallic Cu and Ag nanoparticles, bimetallic Cu x Ag nanoparticles resulted in a much higher silicon conversion, which is attributed to the synergistic electronic effect between Cu and Ag metals. For example, the Cu atom was observed to have a lower electron density in the Cu x Ag bimetallic nanoparticle than that in monometallic Cu nanoparticles, which enhanced the formation of methylchlorosilanes on the silicon surface with chloromethane, demonstrating the significance of the Cu x Ag bimetallic catalysts in catalytic reactions during organosilane synthesis. The insights gained in this study should be conducive to the design of good Cubased catalysts for the Rochow reaction.

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Controllably oxidized copper flakes as multicomponent copper-based catalysts for the Rochow reaction

Cited by 19 publications

References 42 publications

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Low-temperature nanoredox two-step sintering of gelatin nanoskin-stabilized submicrometer-sized copper fine particles for preparing highly conductive layers

Synergistic effect in bimetallic copper–silver (Cu_xAg) nanoparticles enhances silicon conversion in Rochow reaction

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Controllably oxidized copper flakes as multicomponent copper-based catalysts for the Rochow reaction

Cited by 19 publications

References 42 publications

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Recent Advances in Rochow‐Müller Process Research: Driving to Molecular Catalysis and to A More Sustainable Silicone Industry

Low-temperature nanoredox two-step sintering of gelatin nanoskin-stabilized submicrometer-sized copper fine particles for preparing highly conductive layers

Synergistic effect in bimetallic copper–silver (CuxAg) nanoparticles enhances silicon conversion in Rochow reaction

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Synergistic effect in bimetallic copper–silver (Cu_xAg) nanoparticles enhances silicon conversion in Rochow reaction