Co Cu nanoparticles synthesis by galvanic replacement and phase rearrangement during catalytic activation

R. Nafria, A. Genç, M. Ibáñez, J. Arbiol, P. Ramírez De La Piscina, N. Homs, A. Cabot, Langmuir 32 (2016) 2267–2276.

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Journal Article | Published | English
Author
Nafria, Raquel; Genç, Aziz; Ibanez Sabate, MariaIST Austria ; Arbiol, Jprdi; Ramírez De La Piscina, Pilar; Homs, Narcís; Cabot, Andreu
Abstract
The control of the phase distribution in multicomponent nanomaterials is critical to optimize their catalytic performance. In this direction, while impressive advances have been achieved in the past decade in the synthesis of multicomponent nanoparticles and nanocomposites, element rearrangement during catalyst activation has been frequently overseen. Here, we present a facile galvanic replacement-based procedure to synthesize Co@Cu nanoparticles with narrow size and composition distributions. We further characterize their phase arrangement before and after catalytic activation. When oxidized at 350 °C in air to remove organics, Co@Cu core-shell nanostructures oxidize to polycrystalline CuO-Co3O4 nanoparticles with randomly distributed CuO and Co3O4 crystallites. During a posterior reduction treatment in H2 atmosphere, Cu precipitates in a metallic core and Co migrates to the nanoparticle surface to form Cu@Co core-shell nanostructures. The catalytic behavior of such Cu@Co nanoparticles supported on mesoporous silica was further analyzed toward CO2 hydrogenation in real working conditions.
Publishing Year
Date Published
2016-03-08
Journal Title
Langmuir
Acknowledgement
The research was supported by the European Regional Development Funds and the Spanish MICINN projects CSD2009-00050, MAT2014-52416-P, and ENE2013-46624-C4-3-R. M.I. thanks AGAUR for her Beatriu de Pino?s postdoctoral grant 2013 BP-A00344. J.A. and A.G. acknowledge the funding from the Spanish MINECO Severo Ochoa Excellence Program and Generalitat de Catalunya 2014SGR1638.
Volume
32
Issue
9
Page
2267 - 2276
IST-REx-ID
368

Cite this

Nafria R, Genç A, Ibáñez M, et al. Co Cu nanoparticles synthesis by galvanic replacement and phase rearrangement during catalytic activation. Langmuir. 2016;32(9):2267-2276. doi:10.1021/acs.langmuir.5b04622
Nafria, R., Genç, A., Ibáñez, M., Arbiol, J., Ramírez De La Piscina, P., Homs, N., & Cabot, A. (2016). Co Cu nanoparticles synthesis by galvanic replacement and phase rearrangement during catalytic activation. Langmuir, 32(9), 2267–2276. https://doi.org/10.1021/acs.langmuir.5b04622
Nafria, Raquel, Aziz Genç, Maria Ibáñez, Jprdi Arbiol, Pilar Ramírez De La Piscina, Narcís Homs, and Andreu Cabot. “Co Cu Nanoparticles Synthesis by Galvanic Replacement and Phase Rearrangement during Catalytic Activation.” Langmuir 32, no. 9 (2016): 2267–76. https://doi.org/10.1021/acs.langmuir.5b04622.
R. Nafria et al., “Co Cu nanoparticles synthesis by galvanic replacement and phase rearrangement during catalytic activation,” Langmuir, vol. 32, no. 9, pp. 2267–2276, 2016.
Nafria R, Genç A, Ibáñez M, Arbiol J, Ramírez De La Piscina P, Homs N, Cabot A. 2016. Co Cu nanoparticles synthesis by galvanic replacement and phase rearrangement during catalytic activation. Langmuir. 32(9), 2267–2276.
Nafria, Raquel, et al. “Co Cu Nanoparticles Synthesis by Galvanic Replacement and Phase Rearrangement during Catalytic Activation.” Langmuir, vol. 32, no. 9, American Chemical Society, 2016, pp. 2267–76, doi:10.1021/acs.langmuir.5b04622.

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