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Brezhneva N, Dezhkunov NV, Ulasevich SA, Skorb EV. Characterization of transient cavitation activity during sonochemical modification of magnesium particles. ULTRASONICS SONOCHEMISTRY 2021; 70:105315. [PMID: 32906064 PMCID: PMC7786532 DOI: 10.1016/j.ultsonch.2020.105315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 08/18/2020] [Accepted: 08/18/2020] [Indexed: 05/05/2023]
Abstract
Investigation of the cavitation activity during ultrasonic treatment of magnesium particles during nanostructuring has been performed. Cavitation activity is recorded in the continuous mode after switching the ultrasound on with the use of ICA-5DM cavitometer. It has been demonstrated that this characteristic of the cavitation zone may be varied in a wide range of constant output parameters of the generator. The speed and nature of the cavitation activity alteration depended on the concentration of Mg particles in the suspension and the properties of the medium in which the sonochemical treatment has been performed. Three stages of the cavitation area evolution can be distinguished: 1 - the initial increase in cavitation activity, 2 - reaching a maximum with a subsequent decrease, and 3 - reaching the plateau (or the repeated cycles with feedback loops of enlargement/reduction of the cavitation activity). The ultrasonically treated magnesium particles have been characterized by scanning electron microscopy, X-ray diffraction analysis and thermal analysis. Depending on the nature of the dispersed medium the particles can be characterized by the presence of magnesium hydroxide (brucite) and magnesium hydride. It is possible to reach the incorporation of magnesium hydride in the magnesium hydroxide/magnesium matrix by varying the conditions of ultrasonic treatment (duration of treatment, amplitude, dispersed medium etc.). The influence of the magnesium reactivity is also confirmed by the measurements of cavitation activity in organic dispersed media (ethanol, ethylene glycol) and their aqueous mixtures.
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Affiliation(s)
- Nadzeya Brezhneva
- Infochemistry Scientific Center of ITMO University, Lomonosova str. 9, Saint Petersburg 191002, Russia; Belarusian State University, Leningradskaya str. 14, Minsk 220030, Belarus
| | - Nikolai V Dezhkunov
- Belarusian State University of Informatics and Radioelectronics, P. Brovki str. 10, Minsk 220013, Belarus
| | - Sviatlana A Ulasevich
- Infochemistry Scientific Center of ITMO University, Lomonosova str. 9, Saint Petersburg 191002, Russia
| | - Ekaterina V Skorb
- Infochemistry Scientific Center of ITMO University, Lomonosova str. 9, Saint Petersburg 191002, Russia.
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Ares JR, Nevshupa R, Muñoz-Cortés E, Sánchez C, Leardini F, Ferrer IJ, Minh Huy Tran V, Aguey-Zinsou F, Fernández JF. Unconventional Approaches to Hydrogen Sorption Reactions: Non-Thermal and Non-Straightforward Thermally Driven Methods. Chemphyschem 2019; 20:1248-1260. [PMID: 30776188 DOI: 10.1002/cphc.201801182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/18/2019] [Indexed: 11/08/2022]
Abstract
In the last decades, a broad family of hydrides have attracted attention as prospective hydrogen storage materials of very high gravimetric and volumetric capacity, fast H2 -sorption kinetics, environmental friendliness and economical affordability. However, constraints due to their high activation energies of the different H2 -sorption steps and the Gibbs energy of their reaction with H2 has led to the need of high thermal energy to drive H2 uptake and release. High heat leads to significant degradation effects (recrystallization, phase segregation, nanoparticles agglomeration…) of the hydrides. In this context, this short review aims to summarize alternative non-thermal methods and non-straightforward thermally driven methods to overcome the previous constraints. The phenomenology lying behind these methods, i. e. tribological activation, sonication, and electromagnetic radiation, and the effect of these processes on hydrogen sorption properties of hydrides are described. These non-usual approaches could boost the capability of the next generation of solid-hydride materials for hydrogen conversion in energy sector, in mobile devices and as hydrogen reservoirs.
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Affiliation(s)
- Jose-Ramón Ares
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain
| | - Roman Nevshupa
- Spanish National Research Council, "Eduardo Torroja" Institute (IETCC-CSIC), C/Serrano Galvache 4, Madrid, 28033, Spain
| | - Esmeralda Muñoz-Cortés
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain.,Spanish National Research Council, "Eduardo Torroja" Institute (IETCC-CSIC), C/Serrano Galvache 4, Madrid, 28033, Spain
| | - Carlos Sánchez
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain
| | - Fabrice Leardini
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain
| | - Isabel-J Ferrer
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain
| | - Vo Minh Huy Tran
- MERLin, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Francois Aguey-Zinsou
- MERLin, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Jose-Francisco Fernández
- MIRE group-Grupo de Física de Materiales de Interés en Energías Renovables Departamento de Física de Materiales, M-4 Facultad de Ciencias; C/Tomás y Valiente 7, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049., Madrid, Spain
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Nevshupa R, Ares JR, Fernández JF, Del Campo A, Roman E. Tribochemical Decomposition of Light Ionic Hydrides at Room Temperature. J Phys Chem Lett 2015; 6:2780-2785. [PMID: 26266863 DOI: 10.1021/acs.jpclett.5b00998] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Tribochemical decomposition of magnesium hydride (MgH2) induced by deformation at room temperature was studied on a micrometric scale, in situ and in real time. During deformation, a near-full depletion of hydrogen in the micrometric affected zone is observed through an instantaneous (t < 1 s) and huge release of hydrogen (3-50 nmol/s). H release is related to a nonthermal decomposition process. After deformation, the remaining hydride is thermally decomposed at room temperature, exhibiting a much slower rate than during deformation. Confocal-microRaman spectroscopy of the mechanically affected zone was used to characterize the decomposition products. Decomposition was enhanced through the formation of the distorted structure of MgH2 with reduced crystal size by mechanical deformation.
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Affiliation(s)
- Roman Nevshupa
- †Spanish National Research Council, Institute "Eduardo Torroja" (IETCC-CSIC), C/Serrano Galvache 4, Madrid 28033, Spain
| | - Jose Ramón Ares
- ‡Department of Physics of Materials, Autónoma University of Madrid, Madrid 28049, Spain
| | | | - Adolfo Del Campo
- §Spanish National Research Council, Institute of Ceramic and Glass (ICV-CSIC), C/Kelsen 5, Madrid 28049, Spain
| | - Elisa Roman
- ∥Spanish National Research Council, Institute of Material Science of Madrid (ICMM-CSIC), C/Sor Juana Inés de la Cruz 3, Madrid 28049, Spain
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