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Azeredo B, Ben Ghzaiel T, Huang N, Nowak S, Peron J, Giraud M, Balachandran J, Taché O, Barthe L, Piquemal JY, Briois V, Sicard L. Mechanism of formation of Co-Ru nanoalloys: the key role of Ru in the reduction pathway of Co. Phys Chem Chem Phys 2023; 25:22523-22534. [PMID: 37581918 DOI: 10.1039/d3cp02522e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The chemical synthesis of alloy nanoparticles requires adequate conditions to enable co-reduction instead of separate reduction of the two metal cations. The mechanism of formation of bimetallic cobalt-ruthenium nanoalloys by reducing metal salts in an alcohol medium was explored to draw general rules to extrapolate to other systems. The relative kinetics of the reduction of both metal cations were studied by UV-visible and in situ Quick-X-ray absorption spectroscopies as well as H2 evolution. The addition of Co(II) ions does not influence the reduction kinetics of Ru(III) but adding Ru(III) to a Co(II) solution promotes the reduction of cobalt cations. Indeed, while CoO is formed when reaching the boiling temperature of the solvent for the monometallic system, a direct reduction of Co is observed at this temperature without formation of the oxide for the bimetallic one. The co-reduction of the metal cations results in the formation of bimetallic nanoplatelets, the size of which can be tuned by changing the Ru content.
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Affiliation(s)
- Brandon Azeredo
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
- Université de Toulouse, Laboratoire de Physique et Chimie des Nano-Objets, UMR 5215 INSA, CNRS, UPS, 135 Avenue de Rangueil, F-31077 Toulouse, cedex 4, France
| | | | - Ning Huang
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
| | - Sophie Nowak
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
| | - Jennifer Peron
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
| | - Marion Giraud
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
| | | | - Olivier Taché
- Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire, Université Paris Saclay, NIMBE UMR 3685 CEA-CNRS, 91191 Gif sur Yvette, France
| | - Laurent Barthe
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
| | | | - Valérie Briois
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin, France
| | - Lorette Sicard
- Université Paris Cité, CNRS, ITODYS, F-75013 Paris, France.
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Bordoloi K, Kalita GD, Das P. Acceptorless dehydrogenation of alcohols to carboxylic acids by palladium nanoparticles supported on NiO: delving into metal-support cooperation in catalysis. Dalton Trans 2022; 51:9922-9934. [PMID: 35723167 DOI: 10.1039/d2dt01311h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this work, we have developed a simple NiO-supported Pd nanocatalyst (Pd@NiO) for oxidant-free dehydrogenative oxidation of primary alcohols to carboxylic acids along with hydrogen gas as a byproduct. The catalyst has been characterized by techniques like XRD, HRTEM, SEM-EDX, XPS and ICP-AES. The nanostructured Pd@NiO material showed excellent dehydrogenative oxidation activity and outperformed the activity of free NiO or Pd nanoparticles supported on silica/carbon as a catalyst, which could be attributed to synergistic effect of Pd and NiO. A diverse range of aromatic and aliphatic primary alcohols could be efficiently converted to their corresponding carboxylates in high yields with a catalyst loading as low as 0.08 mol%. Notably, highly challenging biomass derived heterocyclic alcohols such as furfuryl alcohol and piperonyl alcohol can also be efficiently converted to their corresponding acids. Moreover, our catalyst can convert benzyl alcohol to benzoic acid on a gram scale with 89% yield. Interestingly, the H2 gas liberated in the reaction can also be used as a substrate for the hydrogenation of 3a to 4a in 65% yield. The nanostructured catalyst is highly reusable and no significant decrease in activity was observed after six reaction cycles. A kinetic study revealed that the reaction followed first-order kinetics with a rate constant of k = 1.47 × 10-4 s-1, under optimized conditions. The extent of reactivity of different functionalities towards dehydrogenation was also investigated using a Hammett plot showing good linearity.
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Affiliation(s)
- Krisangi Bordoloi
- Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India.
| | | | - Pankaj Das
- Department of Chemistry, Dibrugarh University, Dibrugarh 786004, Assam, India.
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Exploring the Biosynthesized Metal Nanoparticles for their Catalytic Degradation of Toxic Water Wastes and Antimicrobial Potential. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02348-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Viola A, Peron J, Giraud M, Sicard L, Chevillot-Biraud A, Decorse P, Nowak S, Beaunier P, Lang P, Piquemal JY. On the importance of the crystalline surface structure on the catalytic activity and stability of tailored unsupported cobalt nanoparticles for the solvent-free acceptor-less alcohol dehydrogenation. J Colloid Interface Sci 2020; 573:165-175. [PMID: 32278948 DOI: 10.1016/j.jcis.2020.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/24/2020] [Accepted: 04/02/2020] [Indexed: 11/28/2022]
Abstract
Unsupported nanoparticles are now recognized as model catalysts to evaluate the intrinsic activity of metal particles, irrespectively of that of the support. Co nanoparticles with different morphologies, rods, diabolos and cubes have been prepared by the polyol process and tested for the acceptorless catalytic dehydrogenation of alcohols under solvent-free conditions. Rods crystallize with the pure hcp structure, diabolos with a mixture of hcp and fcc phases, while the cubes crystallize in a complex mixture of hcp, fcc and ε-Co phases. All the cobalt particles are found to be highly selective towards the oxidation of a model secondary alcohol, octan-2-ol, into the corresponding ketone while no significant activity is found with octan-1-ol. Our results show the strong influence of particle shape on the activity and catalytic stability of the catalysts: Co nanorods display the highest conversion (85%), selectivity (95%) and recyclability compared to Co diabolos and Co cubes. We correlate the nanorods excellent stability with a strong binding of carboxylate ligands on their {1 1 2¯ 0} facets, preserving their crystalline superficial structure, as evidenced by phase modulation infrared reflection absorption spectroscopy.
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Affiliation(s)
- Arnaud Viola
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Jennifer Peron
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Marion Giraud
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Lorette Sicard
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | | | - Philippe Decorse
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Sophie Nowak
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Patricia Beaunier
- Sorbonne Université, CNRS, UMR 7197, Laboratoire de Réactivité de Surface, 75005 Paris, France
| | - Philippe Lang
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France
| | - Jean-Yves Piquemal
- Université de Paris, ITODYS, CNRS, UMR 7086, 15 rue J.-A. de Baïf, F-75013 Paris, France.
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Ramamoorthy RK, Viola A, Grindi B, Peron J, Gatel C, Hytch M, Arenal R, Sicard L, Giraud M, Piquemal JY, Viau G. One-Pot Seed-Mediated Growth of Co Nanoparticles by the Polyol Process: Unraveling the Heterogeneous Nucleation. NANO LETTERS 2019; 19:9160-9169. [PMID: 31756108 DOI: 10.1021/acs.nanolett.9b04584] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The one-step seed-mediated synthesis is widely used for the preparation of ferromagnetic metal nanoparticles (NPs) since it offers a good control of particle morphology. Nevertheless, this approach suffers from a lack of mechanistic studies because of the difficulties of following in real time the heterogeneous nucleation and predicting structure effects with seeds that are generated in situ. Here, we propose a complete scheme of the heteronucleation process involved in one-pot seed-mediated syntheses of cobalt nanoparticles in liquid polyols, relying on geometrical phase analysis (GPA) of high-resolution high-angle annular dark field (HAADF)-STEM images and in situ measurements of the molecular hydrogen evolution. Cobalt particles of different shapes (rods, platelets, or hourglass-like particles) were grown by reducing cobalt carboxylate in liquid polyols in the presence of iridium or ruthenium chloride as the nucleating agent. A reaction scheme was established by monitoring the H2 evolution resulting from the decomposition of metal hydrides, formed in situ by β-elimination of metal alkoxides, and from the polyol dehydrogenation, catalytically activated by the metal particles. This is a very good probe for both the noble metal nucleation and the heterogeneous nucleation of cobalt, showing a good separation of these two steps. Ir and Ru seeds with a size in the range 1-2 nm were found exactly in the center of the cobalt particles, whatever the cobalt particle shape, and high-resolution images revealed an epitaxial growth of the hcp Co on fcc Ir or hcp Ru seeds. The microstructure analysis around the seeds made evident two different ways of relaxing the lattice mismatch between the seeds and the cobalt, with the presence of dislocations around the Ir seeds and compression zones of the cobalt lattice near the Ru seeds. The relationship between the nature of the nucleating agent, the reaction steps, and the microstructure is discussed.
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Affiliation(s)
- Raj Kumar Ramamoorthy
- Université de Toulouse, UMR 5215 INSA, CNRS, UPS, Laboratoire de Physique et Chimie des Nano-Objets , 135 Avenue de Rangueil , F-31077 Cedex 4 Toulouse , France
| | - Arnaud Viola
- Université de Paris , ITODYS, CNRS, UMR 7086 , 15 rue J.-A. de Baïf , F-75013 Paris , France
| | - Bilel Grindi
- Université de Toulouse, UMR 5215 INSA, CNRS, UPS, Laboratoire de Physique et Chimie des Nano-Objets , 135 Avenue de Rangueil , F-31077 Cedex 4 Toulouse , France
| | - Jennifer Peron
- Université de Paris , ITODYS, CNRS, UMR 7086 , 15 rue J.-A. de Baïf , F-75013 Paris , France
| | - Christophe Gatel
- Centre d'Elaboration de Matériaux et d'Etudes Structurales, CEMES-CNRS , 29 rue Jeanne Marvig , B.P. 94347, 31055 Toulouse , France
| | - Martin Hytch
- Centre d'Elaboration de Matériaux et d'Etudes Structurales, CEMES-CNRS , 29 rue Jeanne Marvig , B.P. 94347, 31055 Toulouse , France
| | - Raul Arenal
- Laboratorio de microscopias avanzadas (LMA) , Instituto de Nanociencia de Aragon (INA) , U. Zaragoza, C/Mariano Esquillor s/n , 50018 Zaragoza , Spain
- ARAID Foundation , 50018 Zaragoza , Spain
- Instituto de Ciencias de Materiales Aragon , CSIC-U. Zaragoza , 50009 Zaragoza , Spain
| | - Lorette Sicard
- Université de Paris , ITODYS, CNRS, UMR 7086 , 15 rue J.-A. de Baïf , F-75013 Paris , France
| | - Marion Giraud
- Université de Paris , ITODYS, CNRS, UMR 7086 , 15 rue J.-A. de Baïf , F-75013 Paris , France
| | - Jean-Yves Piquemal
- Université de Paris , ITODYS, CNRS, UMR 7086 , 15 rue J.-A. de Baïf , F-75013 Paris , France
| | - Guillaume Viau
- Université de Toulouse, UMR 5215 INSA, CNRS, UPS, Laboratoire de Physique et Chimie des Nano-Objets , 135 Avenue de Rangueil , F-31077 Cedex 4 Toulouse , France
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