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Janisch D, Igoa Saldaña F, De Rolland Dalon E, V M Inocêncio C, Song Y, Autran PO, Miche A, Casale S, Portehault D. Covalent Transition Metal Borosilicides: Reaction Pathways in Molten Salts for Water Oxidation Electrocatalysis. J Am Chem Soc 2024. [PMID: 39073899 DOI: 10.1021/jacs.4c06074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
The properties of transition metal borides and silicides are intimately linked to the covalent character of the chemical bonds within their crystal structures. Bringing boron and silicon together within metal borosilicides can then engender different competing covalent networks and complex charge distributions. This situation results in unique structures and atomic environments, which can impact charge transport and catalytic properties. Metal borosilicides, however, hold the status of unusual exotic species, difficult to synthesize and with poor knowledge of their properties. Our strategy consists of developing a redox pathway to synthesize transition metal borosilicides in inorganic molten salts as high-temperature solvents. By studying the formation of Ni6Si2B, Co4.75Si2B, Fe5SiB2, and Mn5SiB2 with in situ X-ray diffraction, we highlight how new reaction routes, maintaining covalent structural building blocks, draw a general scheme of their formation. This pathway is driven by the covalence of the chemical bonds within the boron coordination framework. Next, we demonstrate high efficiency for water oxidation electrocatalysis, especially for Ni6Si2B. We ascribe the strongly increased resistance to corrosion, high stability, and electrocatalytic activity of the Ni6Si2B-derived material to three factors: (1) the two entangled boron and silicon covalent networks; (2) the ability to codope with boron and silicon an in situ generated catalytic layer; and (3) a rare electron enrichment of the transition metal by back-donation from boron atoms, previously unknown within this compound family. With this work, we then unveil a new chemical dimension for Earth-abundant water oxidation electrocatalysts by bringing to light a new family of materials.
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Affiliation(s)
- Daniel Janisch
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
| | - Fernando Igoa Saldaña
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
| | - Edouard De Rolland Dalon
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
| | - Carlos V M Inocêncio
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
| | - Yang Song
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
| | - Pierre-Olivier Autran
- European Synchrotron Radiation Facility (ESRF), 71 avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Antoine Miche
- Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, CNRS, 4 place Jussieu, F- 75005 Paris, France
| | - Sandra Casale
- Laboratoire de Réactivité de Surface (LRS), Sorbonne Université, CNRS, 4 place Jussieu, F- 75005 Paris, France
| | - David Portehault
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 4 place Jussieu, F-75005 Paris, France
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Igoa Saldaña F, Defoy E, Janisch D, Rousse G, Autran PO, Ghoridi A, Séné A, Baron M, Suescun L, Le Godec Y, Portehault D. Revealing the Elusive Structure and Reactivity of Iron Boride α-FeB. Inorg Chem 2023; 62:2073-2082. [PMID: 36701311 DOI: 10.1021/acs.inorgchem.2c03709] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Crystal structures can strongly deviate from bulk states when confined into nanodomains. These deviations may deeply affect properties and reactivity and then call for a close examination. In this work, we address the case where extended crystal defects spread through a whole solid and then yield an aperiodic structure and specific reactivity. We focus on iron boride, α-FeB, whose structure has not been elucidated yet, thus hindering the understanding of its properties. We synthesize the two known phases, α-FeB and β-FeB, in molten salts at 600 and 1100 °C, respectively. The experimental X-ray diffraction (XRD) data cannot be satisfactorily accounted for by a periodic crystal structure. We then model the compound as a stochastic assembly of layers of two structure types. Refinement of the powder XRD pattern by considering the explicit scattering interference of the different layers allows quantitative evaluation of the size of these domains and of the stacking faults between them. We, therefore, demonstrate that α-FeB is an intergrowth of nanometer-thick slabs of two structure types, β-FeB and CrB-type structures, in similar proportions. We finally discuss the implications of this novel structure on the reactivity of the material and its ability to perform insertion reactions by comparing the reactivities of α-FeB and β-FeB as reagents in the synthesis of a model layered material: Fe2AlB2. Using synchrotron-based in situ X-ray diffraction, we elucidate the mechanisms of the formation of Fe2AlB2. We highlight the higher reactivity of the intergrowth α-FeB in agreement with structural relationships.
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Affiliation(s)
- Fernando Igoa Saldaña
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France.,Sorbonne Université, CNRS, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 Place Jussieu, F-75005Paris, France
| | - Emile Defoy
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
| | - Daniel Janisch
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
| | - Gwenaëlle Rousse
- Collège de France, Sorbonne Université, Chimie du Solide et de l'Energie (CSE), 75231Paris, Cedex 05, France
| | - Pierre-Olivier Autran
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38040Grenoble, France
| | - Anissa Ghoridi
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
| | - Amandine Séné
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
| | - Marzena Baron
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
| | - Leopoldo Suescun
- Cryssmat-Lab, DETEMA, Facultad de Química, Universidad de la República, Montevideo11800, Uruguay
| | - Yann Le Godec
- Sorbonne Université, CNRS, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 Place Jussieu, F-75005Paris, France
| | - David Portehault
- Sorbonne Université, CNRS, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 Place Jussieu, F-75005Paris, France
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Portehault D, Gómez-Recio I, Baron MA, Musumeci V, Aymonier C, Rouchon V, Le Godec Y. Geoinspired syntheses of materials and nanomaterials. Chem Soc Rev 2022; 51:4828-4866. [PMID: 35603716 DOI: 10.1039/d0cs01283a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The search for new materials is intimately linked to the development of synthesis methods. In the current urge for the sustainable synthesis of materials, taking inspiration from Nature's ways to process matter appears as a virtuous approach. In this review, we address the concept of geoinspiration for the design of new materials and the exploration of new synthesis pathways. In geoinspiration, materials scientists take inspiration from the key features of various geological systems and processes occurring in nature, to trigger the formation of artificial materials and nanomaterials. We discuss several case studies of materials and nanomaterials to highlight the basic geoinspiration concepts underlying some synthesis methods: syntheses in water and supercritical water, thermal shock syntheses, molten salt synthesis and high pressure synthesis. We show that the materials emerging from geoinspiration exhibit properties differing from materials obtained by other pathways, thus demonstrating that the field opens up avenues to new families of materials and nanomaterials. This review focuses on synthesis methodologies, by drawing connections between geosciences and materials chemistry, nanosciences, green chemistry, and environmental sciences.
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Affiliation(s)
- David Portehault
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Isabel Gómez-Recio
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Marzena A Baron
- Sorbonne Université, CNRS, Laboratoire Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, 75005 Paris, France.
| | - Valentina Musumeci
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Cyril Aymonier
- Univ. Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600 Pessac, France
| | - Virgile Rouchon
- IFP Energies nouvelles (IFPEN), Rond point de l'échangeur de Solaize - BP 3, 69360 Solaize, France
| | - Yann Le Godec
- Sorbonne Université, CNRS, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 place Jussieu, F-75005, Paris, France
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