Enhancing catalytic performance of dilute metal alloy nanomaterials

Mathilde Luneau; Erjia Guan; Wei Chen; Alexandre C. Foucher; Nicholas Marcella; Tanya Shirman; David M.A. Verbart; Joanna Aizenberg; Michael Aizenberg; Eric A. Stach; Robert J. Madix; Anatoly I. Frenkel; Cynthia M. Friend

doi:10.1038/s42004-020-0293-2

Enhancing catalytic performance of dilute metal alloy nanomaterials

Mathilde Luneau, Erjia Guan, Wei Chen, Alexandre C. Foucher, Nicholas Marcella, Tanya Shirman, David M.A. Verbart, Joanna Aizenberg, Michael Aizenberg, Eric A. Stach, Robert J. Madix, Anatoly I. Frenkel, Cynthia M. Friend

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Abstract

Dilute alloys are promising materials for sustainable chemical production; however, their composition and structure affect their performance. Herein, a comprehensive study of the effects of pretreatment conditions on the materials properties of Pd_0.04Au_0.96 nanoparticles partially embedded in porous silica is related to the activity for catalytic hydrogenation of 1-hexyne to 1-hexene. A combination of in situ characterization and theoretical calculations provide evidence that changes in palladium surface content are induced by treatment in oxygen, hydrogen and carbon monoxide at various temperatures. In turn, there are changes in hydrogenation activity because surface palladium is necessary for H₂ dissociation. These Pd_0.04Au_0.96 nanoparticles in the porous silica remain structurally intact under many cycles of activation and deactivation and are remarkably resistant to sintering, demonstrating that dilute alloy catalysts are highly dynamic systems that can be tuned and maintained in a active state.

Original language	English
Article number	46
Journal	Communications Chemistry
Volume	3
Issue number	1
DOIs	https://doi.org/10.1038/s42004-020-0293-2
State	Published - Dec 1 2020
Externally published	Yes

Funding

This work was supported as part of the Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award #DESC0012573. ML gratefully acknowledges support from TOTAL.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	0012573
Basic Energy Sciences
Total

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AU - Marcella, Nicholas

AU - Shirman, Tanya

AU - Verbart, David M.A.

AU - Aizenberg, Joanna

AU - Aizenberg, Michael

AU - Stach, Eric A.

AU - Madix, Robert J.

AU - Frenkel, Anatoly I.

AU - Friend, Cynthia M.

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Enhancing catalytic performance of dilute metal alloy nanomaterials

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