Nickel-cobalt hydroxide catalysts for the cycloaddition of carbon dioxide to epoxides

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dc.creatorRibeiro, Stephany Larissa da Silva
dc.creatorSilva, Cristiane Garcia
dc.creatorPrado, Gabriel Elias Taliateli Oliveira
dc.creatorMata, Álvaro Farias Arruda da
dc.creatorMilani, Jorge Luiz Sônego
dc.creatorMartins, Paulo Roberto
dc.creatorChagas, Rafael Pavão das
dc.date.accessioned2024-07-18T14:30:52Z
dc.date.available2024-07-18T14:30:52Z
dc.date.issued2022
dc.description.abstractNickel and cobalt bimetallic hydroxides, in which both metal cations present the same oxidation state, were synthesized and characterized by XRD, TGA, TEM, XPS, and ICP-OES. The catalytic activity in the cycloaddition of carbon dioxide with epoxides was evaluated in a binary system, using tetrabutylammonium bromide as cocatalyst. All materials were active catalysts for the production of cyclic carbonates in the initial conditions, providing conversions and selectivities up to 75% and 93%, respectively. The influence of the parameters time, temperature, catalyst amount, pressure, and cocatalyst type was examined. Using the catalyst with the molar ratio 50:50 of Ni and Co (NiCo-50), a series of epoxides was converted to the respective carbonates under the optimal conditions, providing excellent conversions and selectivity. Alkylic propylene oxide and butylene oxide presented 84% and 83% of conversion, respectively. For epoxides containing electron-withdrawing substituents, the conversions were quantitative (> 99%) and highly selective to the cyclic carbonate. Reuse experiments were conducted, and showed that NiCo-50 can be recovered and reused at least five times, without decline in conversion and selectivity.
dc.identifier.citationRIBEIRO, Stephany L. S. et al. Nickel-cobalt hydroxide catalysts for the cycloaddition of carbon dioxide to epoxides. Research on Chemical Intermediates, [s. l.], v. 48, p. 1907-1921, 2022. DOI: 10.1007/s11164-022-04697-7. Disponível em: https://link.springer.com/article/10.1007/s11164-022-04697-7. Acesso em: 5 jul. 2024.
dc.identifier.doi10.1007/s11164-022-04697-7
dc.identifier.issne- 1568-5675
dc.identifier.issn0922-6168
dc.identifier.urihttps://link.springer.com/article/10.1007/s11164-022-04697-7
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Química - IQ (RMG)
dc.rightsAcesso Restrito
dc.subjectNickel cobalt hydroxide
dc.subjectCarbon dioxide
dc.subjectCO2 fixation
dc.subjectCyclic carbonate
dc.subjectHeterogeneous catalysis
dc.subjectHydrogen bond donor
dc.titleNickel-cobalt hydroxide catalysts for the cycloaddition of carbon dioxide to epoxides
dc.typeArtigo

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