The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys
Magnesium-based hydrogen storage materials are promising candidates for hydrogen storage due to their high storage density and environmentally friendly properties. However, the high dehydrogenation enthalpy change (approximately 75 kJ/mol H2) and high dehydrogenation temperature (573 K at 0.1 MPa) o...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-07-01
|
| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956725002129 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849239368156315648 |
|---|---|
| author | Yan Zheng Shenglan Yang Bin Hu Yangfan Lu Yan Yang Kai Tang Qun Luo Bin Liu Qian Li Fusheng Pan |
| author_facet | Yan Zheng Shenglan Yang Bin Hu Yangfan Lu Yan Yang Kai Tang Qun Luo Bin Liu Qian Li Fusheng Pan |
| author_sort | Yan Zheng |
| collection | DOAJ |
| description | Magnesium-based hydrogen storage materials are promising candidates for hydrogen storage due to their high storage density and environmentally friendly properties. However, the high dehydrogenation enthalpy change (approximately 75 kJ/mol H2) and high dehydrogenation temperature (573 K at 0.1 MPa) of MgH2, limits the engineering application of Mg/MgH2 as a hydrogen storage material. This work reviews the prediction models and methods of enthalpy changes for hydriding/dehydriding (H/D) reactions in order to find out the ideas and ways to reduce them. The mechanism behind the improvement methods mainly includes two aspects, weakening Mg-H bond and compensating heat of reaction. Proceed from this, the experimental methods and enthalpy data as well as calculated values of enthalpy changes were compared systematically. Elements such as Ti, Nb, V, etc., with a small electronegativity difference compared to Mg, can reduce the hydrogenation and dehydrogenation enthalpy changes by forming strong Metal-H or Metal-Mg bonds. In addition, this review concludes with an outlook on the remaining challenge issues and prospects. |
| format | Article |
| id | doaj-art-546d0205dc1e43fb9eb4de4868cbfde0 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-546d0205dc1e43fb9eb4de4868cbfde02025-08-20T04:01:01ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-07-011372959297710.1016/j.jma.2025.06.016The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloysYan Zheng0Shenglan Yang1Bin Hu2Yangfan Lu3Yan Yang4Kai Tang5Qun Luo6Bin Liu7Qian Li8Fusheng Pan9School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaCollege of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China; Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing 401135, ChinaChongqing Institute of New Energy Storage Materials and Equipment, Chongqing 401135, ChinaCollege of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China; Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing 401135, ChinaCollege of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, ChinaSINTEF Industry, Trondheim N-7465, NorwaySchool of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; Corresponding authors.School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; Corresponding authors.School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; College of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China; Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing 401135, China; Corresponding authors.College of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing 400044, China; Chongqing Institute of New Energy Storage Materials and Equipment, Chongqing 401135, ChinaMagnesium-based hydrogen storage materials are promising candidates for hydrogen storage due to their high storage density and environmentally friendly properties. However, the high dehydrogenation enthalpy change (approximately 75 kJ/mol H2) and high dehydrogenation temperature (573 K at 0.1 MPa) of MgH2, limits the engineering application of Mg/MgH2 as a hydrogen storage material. This work reviews the prediction models and methods of enthalpy changes for hydriding/dehydriding (H/D) reactions in order to find out the ideas and ways to reduce them. The mechanism behind the improvement methods mainly includes two aspects, weakening Mg-H bond and compensating heat of reaction. Proceed from this, the experimental methods and enthalpy data as well as calculated values of enthalpy changes were compared systematically. Elements such as Ti, Nb, V, etc., with a small electronegativity difference compared to Mg, can reduce the hydrogenation and dehydrogenation enthalpy changes by forming strong Metal-H or Metal-Mg bonds. In addition, this review concludes with an outlook on the remaining challenge issues and prospects.http://www.sciencedirect.com/science/article/pii/S2213956725002129Magnesium-based hydrogen storage materialsThermodynamicsHydrogenation and dehydrogenation enthalpy changesTheoretical methods |
| spellingShingle | Yan Zheng Shenglan Yang Bin Hu Yangfan Lu Yan Yang Kai Tang Qun Luo Bin Liu Qian Li Fusheng Pan The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys Journal of Magnesium and Alloys Magnesium-based hydrogen storage materials Thermodynamics Hydrogenation and dehydrogenation enthalpy changes Theoretical methods |
| title | The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys |
| title_full | The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys |
| title_fullStr | The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys |
| title_full_unstemmed | The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys |
| title_short | The enthalpy changes for hydrogenation/dehydrogenation of Mg-based alloys |
| title_sort | enthalpy changes for hydrogenation dehydrogenation of mg based alloys |
| topic | Magnesium-based hydrogen storage materials Thermodynamics Hydrogenation and dehydrogenation enthalpy changes Theoretical methods |
| url | http://www.sciencedirect.com/science/article/pii/S2213956725002129 |
| work_keys_str_mv | AT yanzheng theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT shenglanyang theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT binhu theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT yangfanlu theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT yanyang theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT kaitang theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT qunluo theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT binliu theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT qianli theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT fushengpan theenthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT yanzheng enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT shenglanyang enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT binhu enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT yangfanlu enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT yanyang enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT kaitang enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT qunluo enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT binliu enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT qianli enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys AT fushengpan enthalpychangesforhydrogenationdehydrogenationofmgbasedalloys |