Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride
Catalytic doping of magnesium hydride (MgH2) to improve its hydrogen ab/desorption kinetic properties is considered to be an effective and feasible method. In solid-phase catalysis, the extent of contact between the catalyst and the substrate determines the catalytic reaction in a great sense. With...
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KeAi Communications Co., Ltd.
2025-01-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724001476 |
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| author | Tao Zhong Tian Xu Liuting Zhang Fuying Wu Yiqun Jiang Xuebin Yu |
| author_facet | Tao Zhong Tian Xu Liuting Zhang Fuying Wu Yiqun Jiang Xuebin Yu |
| author_sort | Tao Zhong |
| collection | DOAJ |
| description | Catalytic doping of magnesium hydride (MgH2) to improve its hydrogen ab/desorption kinetic properties is considered to be an effective and feasible method. In solid-phase catalysis, the extent of contact between the catalyst and the substrate determines the catalytic reaction in a great sense. With large specific surface area and abundant active sites, two-dimensional (2D) nanomaterials are promising catalysts for MgH2 via providing numerous pathways for the diffusion and dissociation of hydrogen. In this regard, 2D NiMn-based layered double hydroxide and layered metallic oxide (LMO) are designed and introduced into MgH2 to improve its hydrogen storage properties. Simultaneous enhancement in interfacial contact, desorption temperature and kinetics are achieved. The MgH2+9wt% Ni3Mn-LMO composites begin to discharge hydrogen at only 190 °C and 6.10wt% H2 could be charged in 600 s at 150 °C. The activation energy for de/hydrogenation is reduced by 42.43% and 46.56%, respectively, compared to pure MgH2. Even at a low operating temperature of 235 °C, the modified system was still able to release 4.44wt% H2 in an hour, which has rarely been reported in previous studies. Microstructure observations and density functional theory calculations revealed that first, the hydrogen pumping effect of Mg2Ni/Mg2NiH4 promotes the adsorption and desorption of hydrogen molecules on the surface of MgH2, second, MnOx drew electrons from Mg2Ni, producing a new Density of State structure with a lower d-bond center. This unique change further strengthens the Mg2Ni/Mg2NiH4 pump effect on MgH2. Our work indicates that the application of 2D metal-based catalysts is a feasible and promising approach towards MgH2 for solid-state hydrogen storage to meet technical and scientific requirements. |
| format | Article |
| id | doaj-art-2ffe595859ef401cb8e462be069cddff |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-2ffe595859ef401cb8e462be069cddff2025-02-06T05:11:39ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-01-01131148160Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydrideTao Zhong0Tian Xu1Liuting Zhang2Fuying Wu3Yiqun Jiang4Xuebin Yu5School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaDepartment of Materials Science, Fudan University, Shanghai 200433, ChinaSchool of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, China; Corresponding authors.School of Energy and Power, Instrumental Analysis Center, Jiangsu University of Science and Technology, Zhenjiang 212003, ChinaMax Planck Institute for Iron Research, 40237 Düsseldorf, GermanyDepartment of Materials Science, Fudan University, Shanghai 200433, China; Corresponding authors.Catalytic doping of magnesium hydride (MgH2) to improve its hydrogen ab/desorption kinetic properties is considered to be an effective and feasible method. In solid-phase catalysis, the extent of contact between the catalyst and the substrate determines the catalytic reaction in a great sense. With large specific surface area and abundant active sites, two-dimensional (2D) nanomaterials are promising catalysts for MgH2 via providing numerous pathways for the diffusion and dissociation of hydrogen. In this regard, 2D NiMn-based layered double hydroxide and layered metallic oxide (LMO) are designed and introduced into MgH2 to improve its hydrogen storage properties. Simultaneous enhancement in interfacial contact, desorption temperature and kinetics are achieved. The MgH2+9wt% Ni3Mn-LMO composites begin to discharge hydrogen at only 190 °C and 6.10wt% H2 could be charged in 600 s at 150 °C. The activation energy for de/hydrogenation is reduced by 42.43% and 46.56%, respectively, compared to pure MgH2. Even at a low operating temperature of 235 °C, the modified system was still able to release 4.44wt% H2 in an hour, which has rarely been reported in previous studies. Microstructure observations and density functional theory calculations revealed that first, the hydrogen pumping effect of Mg2Ni/Mg2NiH4 promotes the adsorption and desorption of hydrogen molecules on the surface of MgH2, second, MnOx drew electrons from Mg2Ni, producing a new Density of State structure with a lower d-bond center. This unique change further strengthens the Mg2Ni/Mg2NiH4 pump effect on MgH2. Our work indicates that the application of 2D metal-based catalysts is a feasible and promising approach towards MgH2 for solid-state hydrogen storage to meet technical and scientific requirements.http://www.sciencedirect.com/science/article/pii/S2213956724001476Hydrogen storageMagnesium hydrideLayered metal oxidesMultivalent catalysis |
| spellingShingle | Tao Zhong Tian Xu Liuting Zhang Fuying Wu Yiqun Jiang Xuebin Yu Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride Journal of Magnesium and Alloys Hydrogen storage Magnesium hydride Layered metal oxides Multivalent catalysis |
| title | Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride |
| title_full | Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride |
| title_fullStr | Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride |
| title_full_unstemmed | Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride |
| title_short | Designing multivalent NiMn-based layered nanosheets with high specific surface area and abundant active sites for solid-state hydrogen storage in magnesium hydride |
| title_sort | designing multivalent nimn based layered nanosheets with high specific surface area and abundant active sites for solid state hydrogen storage in magnesium hydride |
| topic | Hydrogen storage Magnesium hydride Layered metal oxides Multivalent catalysis |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724001476 |
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