Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media
A swarf of aluminum alloy with high corrosion resistance and ductility was successfully converted into fine hydro reactive powders via ball milling with silver powder and either lithium chloride or gallium. The latter substances significantly intensified particle size reduction, while silver formed...
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MDPI AG
2024-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/2/530 |
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| author | Olesya A. Buryakovskaya Konstantin I. Maslakov Nikita O. Borshchev Grayr N. Ambaryan Aleksey V. Butyrin Mikhail S. Vlaskin |
| author_facet | Olesya A. Buryakovskaya Konstantin I. Maslakov Nikita O. Borshchev Grayr N. Ambaryan Aleksey V. Butyrin Mikhail S. Vlaskin |
| author_sort | Olesya A. Buryakovskaya |
| collection | DOAJ |
| description | A swarf of aluminum alloy with high corrosion resistance and ductility was successfully converted into fine hydro reactive powders via ball milling with silver powder and either lithium chloride or gallium. The latter substances significantly intensified particle size reduction, while silver formed ‘cathodic’ sites (Ag, Ag<sub>2</sub>Al), promoting Al corrosion in aqueous saline solutions with hydrogen generation. The diffraction patterns, microphotographs, and elemental analysis results demonstrated partial aluminum oxidation in the samples and their contamination with tungsten carbide from milling balls. Those factors were responsible for obtaining lower hydrogen yields than expected. For AlCl<sub>3</sub> solution at 60 °C, Al–LiCl–Ag, Al–LiCl, Al–Ga–Ag, and Al–Ga composites delivered (84.6 ± 0.2), (86.8 ± 1.4), (80.2 ± 0.5), and (76.7 ± 0.7)% of the expected hydrogen, respectively. Modification with Ag promoted Al oxidation, thus providing higher hydrogen evolution rates. The samples with Ag were tested in a CaCl<sub>2</sub> solution as well, for which the reaction proceeded much more slowly. At a higher temperature (80 °C) after 3 h of experiment, the corresponding hydrogen yields for Al–LiCl–Ag and Al–Ga–Ag powders were (46.7 ± 2.1) and (31.8 ± 1.9)%. The tested Ag-modified composite powders were considered promising for hydrogen generation and had the potential for further improvement to deliver higher hydrogen yields. |
| first_indexed | 2024-03-08T09:48:26Z |
| format | Article |
| id | doaj.art-1b9bf90608dc4b03a1a26167f3ff619c |
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| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-08T09:48:26Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-1b9bf90608dc4b03a1a26167f3ff619c2024-01-29T14:09:21ZengMDPI AGMolecules1420-30492024-01-0129253010.3390/molecules29020530Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline MediaOlesya A. Buryakovskaya0Konstantin I. Maslakov1Nikita O. Borshchev2Grayr N. Ambaryan3Aleksey V. Butyrin4Mikhail S. Vlaskin5Joint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, 119991 Moscow, RussiaJoint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, RussiaJoint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, RussiaJoint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, RussiaJoint Institute for High Temperatures of the Russian Academy of Sciences, 125412 Moscow, RussiaA swarf of aluminum alloy with high corrosion resistance and ductility was successfully converted into fine hydro reactive powders via ball milling with silver powder and either lithium chloride or gallium. The latter substances significantly intensified particle size reduction, while silver formed ‘cathodic’ sites (Ag, Ag<sub>2</sub>Al), promoting Al corrosion in aqueous saline solutions with hydrogen generation. The diffraction patterns, microphotographs, and elemental analysis results demonstrated partial aluminum oxidation in the samples and their contamination with tungsten carbide from milling balls. Those factors were responsible for obtaining lower hydrogen yields than expected. For AlCl<sub>3</sub> solution at 60 °C, Al–LiCl–Ag, Al–LiCl, Al–Ga–Ag, and Al–Ga composites delivered (84.6 ± 0.2), (86.8 ± 1.4), (80.2 ± 0.5), and (76.7 ± 0.7)% of the expected hydrogen, respectively. Modification with Ag promoted Al oxidation, thus providing higher hydrogen evolution rates. The samples with Ag were tested in a CaCl<sub>2</sub> solution as well, for which the reaction proceeded much more slowly. At a higher temperature (80 °C) after 3 h of experiment, the corresponding hydrogen yields for Al–LiCl–Ag and Al–Ga–Ag powders were (46.7 ± 2.1) and (31.8 ± 1.9)%. The tested Ag-modified composite powders were considered promising for hydrogen generation and had the potential for further improvement to deliver higher hydrogen yields.https://www.mdpi.com/1420-3049/29/2/530aluminum–silver powdergalliumlithium chloridehigh-energy ball millingaqueous chlorine solutionhydrogen generation |
| spellingShingle | Olesya A. Buryakovskaya Konstantin I. Maslakov Nikita O. Borshchev Grayr N. Ambaryan Aleksey V. Butyrin Mikhail S. Vlaskin Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media Molecules aluminum–silver powder gallium lithium chloride high-energy ball milling aqueous chlorine solution hydrogen generation |
| title | Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media |
| title_full | Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media |
| title_fullStr | Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media |
| title_full_unstemmed | Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media |
| title_short | Silver-Assisted Hydrogen Evolution from Aluminum Oxidation in Saline Media |
| title_sort | silver assisted hydrogen evolution from aluminum oxidation in saline media |
| topic | aluminum–silver powder gallium lithium chloride high-energy ball milling aqueous chlorine solution hydrogen generation |
| url | https://www.mdpi.com/1420-3049/29/2/530 |
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