Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO
Due to the high activation energy required for the decomposition of Mg metal hydrides, it can be decomposed into magnesium and H2 when the external temperature reaches 350 °C. In this paper, Nd5Mg41Ni + x wt.% GO (x = 0–4) composites were obtained by planetary ball milling the alloy with GO for 10 h...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424002229 |
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| author | Xiaoming Li Zeming Yuan Chenxu Liu Yongqi Sui Zhonggang Han Tingting Zhai Zhonghui Hou Dianchen Feng |
| author_facet | Xiaoming Li Zeming Yuan Chenxu Liu Yongqi Sui Zhonggang Han Tingting Zhai Zhonghui Hou Dianchen Feng |
| author_sort | Xiaoming Li |
| collection | DOAJ |
| description | Due to the high activation energy required for the decomposition of Mg metal hydrides, it can be decomposed into magnesium and H2 when the external temperature reaches 350 °C. In this paper, Nd5Mg41Ni + x wt.% GO (x = 0–4) composites were obtained by planetary ball milling the alloy with GO for 10 h. The alloy has Nd5Mg41, NdMg3, NdMg12 and Mg2Ni phase, and the main phase is Nd5Mg41 phase. The time required for the alloy phase structure composite material to reach the maximum hydrogen desorption capacity of 95 % is 20, 23, 18, 17 and 18 min, and the calculated hydrogen desorption activation energy Ea values are 99.9, 98.1, 95.6, 89.9 and 95.7 kJ/mol H2, the ΔHde of the composites are 77.57, 76.40, 73.48, 70.77 and 81.2 kJ/mol H2, respectively. The alloy particles are embedded in the layered GO to form a special microstructure of the nanocrystalline GO embedded nanocrystalline alloy, which makes the composite material easier to adsorb hydrogen molecules and promotes the dissociation of hydrogen molecules and the diffusion of hydrogen atoms. However, the excessive addition of GO leads to excessive GO coating alloy particles, which hinders the diffusion of hydrogen atoms. The agglomeration of alloy particles leads to the increase of hydrogen desorption enthalpy of the alloy. |
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| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:34Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-557d23c59e10402db5490a2d91c343a32024-03-24T06:57:40ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012914981515Hydrogen storage properties of Nd5Mg41Ni alloy improved by GOXiaoming Li0Zeming Yuan1Chenxu Liu2Yongqi Sui3Zhonggang Han4Tingting Zhai5Zhonghui Hou6Dianchen Feng7Instrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaCorresponding author. Instrumental Analysis Center, Inner Mongolia University of Science and Technology, No. 7 Aerding Road, Kun District, 014010, Baotou, China.; Instrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaInstrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaInstrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaInstrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaCorresponding author. Instrumental Analysis Center, Inner Mongolia University of Science and Technology, No. 7 Aerding Road, Kun District, 014010, Baotou, China.; Instrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaInstrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaInstrumental Analysis Center, Inner Mongolia University of Science and Technology, Baotou, 014010, ChinaDue to the high activation energy required for the decomposition of Mg metal hydrides, it can be decomposed into magnesium and H2 when the external temperature reaches 350 °C. In this paper, Nd5Mg41Ni + x wt.% GO (x = 0–4) composites were obtained by planetary ball milling the alloy with GO for 10 h. The alloy has Nd5Mg41, NdMg3, NdMg12 and Mg2Ni phase, and the main phase is Nd5Mg41 phase. The time required for the alloy phase structure composite material to reach the maximum hydrogen desorption capacity of 95 % is 20, 23, 18, 17 and 18 min, and the calculated hydrogen desorption activation energy Ea values are 99.9, 98.1, 95.6, 89.9 and 95.7 kJ/mol H2, the ΔHde of the composites are 77.57, 76.40, 73.48, 70.77 and 81.2 kJ/mol H2, respectively. The alloy particles are embedded in the layered GO to form a special microstructure of the nanocrystalline GO embedded nanocrystalline alloy, which makes the composite material easier to adsorb hydrogen molecules and promotes the dissociation of hydrogen molecules and the diffusion of hydrogen atoms. However, the excessive addition of GO leads to excessive GO coating alloy particles, which hinders the diffusion of hydrogen atoms. The agglomeration of alloy particles leads to the increase of hydrogen desorption enthalpy of the alloy.http://www.sciencedirect.com/science/article/pii/S2238785424002229Ball millingGOMg-based alloyHydrogen storageKinetic |
| spellingShingle | Xiaoming Li Zeming Yuan Chenxu Liu Yongqi Sui Zhonggang Han Tingting Zhai Zhonghui Hou Dianchen Feng Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO Journal of Materials Research and Technology Ball milling GO Mg-based alloy Hydrogen storage Kinetic |
| title | Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO |
| title_full | Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO |
| title_fullStr | Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO |
| title_full_unstemmed | Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO |
| title_short | Hydrogen storage properties of Nd5Mg41Ni alloy improved by GO |
| title_sort | hydrogen storage properties of nd5mg41ni alloy improved by go |
| topic | Ball milling GO Mg-based alloy Hydrogen storage Kinetic |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424002229 |
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