Reductive transformation of CO 2 : Fluoride-catalyzed reactions with waste silicon-based reducing agents

Motokura, Ken; Naijo, Masaki; Yamaguchi, Sho; Miyaji, Akimitsu

doi:10.1016/s1872-2067(17)62800-6

Cited by 10 publications

(13 citation statements)

References 14 publications

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“…However, the replacement of fluorosilane with silanol may not be irreversible but rather follows an equilibrium. 20 This reaction mechanism is based on the reaction between CO 2 , H 2 O, and disilane (R 3 Si-SiR 3 ). 22 The TBA-catalysed reaction system using the powdered silicon is potentially applicable to produce other reduction Scheme 1 Isotopic experiment.…”

Section: Resultsmentioning

confidence: 99%

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Catalytic reduction and reductive functionalisation of carbon dioxide with waste silicon from solar panel as the reducing agent

et al. 2022

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Section: Resultsmentioning

confidence: 99%

“…The key catalytic reaction step is Si-Si bond cleavage and in situ formation of an active Si-H species, which was also revealed in the reaction of disilane and H 2 O with fluoride. [19][20][21]…”

Section: Introductionmentioning

confidence: 99%

Catalytic reduction and reductive functionalisation of carbon dioxide with waste silicon from solar panel as the reducing agent

et al. 2022

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“…Regarding the CO 2 reduction with silanes, impressive developments in homogeneous organocatalysis include the application of N-heterocyclic carbenes (NHCs), [45,[51][52][53][54] organic superbases, [55][56][57] triphenylborane, [58] frustrated Lewis pairs, [33,59] and even simple anions such as fluoride [60][61][62][63][64] and formate. [65,66] Recently, numerous studies addressed the development of heterogeneous organocatalysis, which is attractive because of the potential recyclability of the catalyst.…”

Section: Methodsmentioning

confidence: 99%

Heterogeneous Organocatalysts for the Reduction of Carbon Dioxide with Silanes

Pramudita

Motokura

2020

ChemSusChem

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The utilization of carbon dioxide (CO 2) as feedstock for chemical industries is gaining interest as a sustainable alternative to nonrenewable fossil resources. However, CO 2 reduction is necessary to increase its energy content. Hydrosilane is a potential reducing agent that exhibits excellent reactivity under ambient conditions. CO 2 hydrosilylation yields versatile products such as silylformate and methoxysilane, whereas formamides and N-methylated products are obtained in the presence of amines. In these transformations, organocatalysts are considered as the more sustainable choice of catalyst. In particular, heterogeneous organocatalysts featuring precisely designed active sites offer higher efficiency due to their recyclability. Herein, an overview is presented of the current development of basic organocatalysts immobilized on various supports for application in the chemical reduction of CO 2 with hydrosilanes, and the potential active species parameters that might affect the catalytic activity are identified.

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“…Our group have previously reported simple fluoride and carbonate salts as homogeneous catalysts for hydrosilylation of CO 2 . In addition, Si‐based reducing agents other than hydrosilane, disilane and metallic silicon were examined for CO 2 conversion reaction suing fluoride catalysts …”

Section: Fluoride and Carbonate Salt Catalyst For Reductive Transformmentioning

confidence: 99%

“…Based on the unique reactivity of the fluoride anion with the Si−Si chemical bond for the CO 2 reduction reaction, we also examined the reaction of metallic Si in the presence of CO 2 and H 2 O (Scheme ). It was found that 0.10 mmol of formic acid and its derivative were obtained using 0.05 mmol of fluoride . After the reaction, solid residue was separated by filtration.…”

Section: Fluoride and Carbonate Salt Catalyst For Reductive Transformmentioning

confidence: 99%

Efficient Conversion of Carbon Dioxide with Si‐Based Reducing Agents Catalyzed by Metal Complexes and Salts

Motokura

Pramudita

2018

The Chemical Record

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Homogeneous metal complex and salt catalysts were developed for the reductive transformation of CO with Si-based reducing agents. Cu-bisphosphine complexes were found to be excellent catalysts for the hydrosilylation of CO with polymethylhydrosiloxane (PMHS). The Cu complexes also showed high catalytic activity and a wide substrate scope for formamide synthesis from amines, CO , and PMHS. Simple fluoride salts such as tetrabutylammonium fluoride acted as good catalysts for the reductive conversion of CO to formic acid in the presence of hydrosilane, disilane, and metallic Si. Based on the kinetics, isotopic experiments, and in-situ NMR measurements, the reaction mechanism for both catalyst systems, the Cu complex and the fluoride salt, have been proposed.

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Reductive transformation of CO 2 : Fluoride-catalyzed reactions with waste silicon-based reducing agents

Cited by 10 publications

References 14 publications

Catalytic reduction and reductive functionalisation of carbon dioxide with waste silicon from solar panel as the reducing agent

Catalytic reduction and reductive functionalisation of carbon dioxide with waste silicon from solar panel as the reducing agent

Heterogeneous Organocatalysts for the Reduction of Carbon Dioxide with Silanes

Efficient Conversion of Carbon Dioxide with Si‐Based Reducing Agents Catalyzed by Metal Complexes and Salts

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