{"title":"用 RE2O3(RE = Dy、Er、Yb)改性 Re-Mg 基合金的微观结构和储氢性能研究","authors":"Hui Yong, Pei Yan, Yiwan Chen, Qianqian Zhang, Shuai Wang, Zhigao Sheng, Jifan Hu","doi":"10.1016/j.psep.2024.09.061","DOIUrl":null,"url":null,"abstract":"In order to further study the hydrogen storage mechanism of Mg-based hydrogen storage materials, Mg<ce:inf loc=\"post\">90</ce:inf>Ce<ce:inf loc=\"post\">5</ce:inf>Y<ce:inf loc=\"post\">5</ce:inf> alloy was used as the basis, and three kinds of heavy rare earth oxides were doped into the alloy by ball milling technology. The microstructure and hydrogen storage properties were characterized by XRD, SEM, TEM and PCI. The results show that the hydrogen absorption rate and discharge rate of modified Mg<ce:inf loc=\"post\">90</ce:inf>Ce<ce:inf loc=\"post\">5</ce:inf>Y<ce:inf loc=\"post\">5</ce:inf> alloy are significantly increased, and the performance is Er<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> > Dy<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> > Yb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>. The hydrogen storage capacity of Er<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> catalyzed samples is 5.02 wt%, which is higher than 4.82 wt% and 4.80 wt% of Dy<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> and Yb<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> catalyzed samples. The hydrogen absorption saturation rate of the sample catalyzed by Er<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> for 2 min is ∼90 %, the complete release of hydrogen only takes 50 min at 573 K, and the dehydrogenation activation energy is 76.9 kJ/mol. The hydrogen absorption and emission rate is fast, and the dehydrogenation activation energy is slightly lower than that of the other two catalysts. In the process of hydrogen absorption and desorption, the three catalysts exhibit different phase transitions, namely DyH<ce:inf loc=\"post\">2</ce:inf>↔DyH<ce:inf loc=\"post\">3</ce:inf>, ErH<ce:inf loc=\"post\">2</ce:inf>↔ErH<ce:inf loc=\"post\">3</ce:inf> and irreversible YbH<ce:inf loc=\"post\">2</ce:inf>. DyH<ce:inf loc=\"post\">2</ce:inf>↔DyH<ce:inf loc=\"post\">3</ce:inf>, ErH<ce:inf loc=\"post\">2</ce:inf>↔ErH<ce:inf loc=\"post\">3</ce:inf> phase transitions have the \"hydrogen pump\" effect, which can effectively improve the hydrogen absorption and desorption kinetic rate of Mg<ce:inf loc=\"post\">90</ce:inf>Ce<ce:inf loc=\"post\">5</ce:inf>Y<ce:inf loc=\"post\">5</ce:inf> alloy. Some nano-rare earth compounds and phase transformation significantly improve the kinetic properties of the alloy. However, the enthalpy change of all three catalytic alloys is around 76 kJ/mol H<ce:inf loc=\"post\">2</ce:inf>, which is considered only a slight improvement in thermodynamic properties.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":null,"pages":null},"PeriodicalIF":6.9000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigation of microstructure, hydrogen storage performance of Re-Mg-based alloy modified by RE2O3 (RE = Dy, Er, Yb)\",\"authors\":\"Hui Yong, Pei Yan, Yiwan Chen, Qianqian Zhang, Shuai Wang, Zhigao Sheng, Jifan Hu\",\"doi\":\"10.1016/j.psep.2024.09.061\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In order to further study the hydrogen storage mechanism of Mg-based hydrogen storage materials, Mg<ce:inf loc=\\\"post\\\">90</ce:inf>Ce<ce:inf loc=\\\"post\\\">5</ce:inf>Y<ce:inf loc=\\\"post\\\">5</ce:inf> alloy was used as the basis, and three kinds of heavy rare earth oxides were doped into the alloy by ball milling technology. The microstructure and hydrogen storage properties were characterized by XRD, SEM, TEM and PCI. The results show that the hydrogen absorption rate and discharge rate of modified Mg<ce:inf loc=\\\"post\\\">90</ce:inf>Ce<ce:inf loc=\\\"post\\\">5</ce:inf>Y<ce:inf loc=\\\"post\\\">5</ce:inf> alloy are significantly increased, and the performance is Er<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> > Dy<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> > Yb<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf>. The hydrogen storage capacity of Er<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> catalyzed samples is 5.02 wt%, which is higher than 4.82 wt% and 4.80 wt% of Dy<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> and Yb<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> catalyzed samples. The hydrogen absorption saturation rate of the sample catalyzed by Er<ce:inf loc=\\\"post\\\">2</ce:inf>O<ce:inf loc=\\\"post\\\">3</ce:inf> for 2 min is ∼90 %, the complete release of hydrogen only takes 50 min at 573 K, and the dehydrogenation activation energy is 76.9 kJ/mol. The hydrogen absorption and emission rate is fast, and the dehydrogenation activation energy is slightly lower than that of the other two catalysts. In the process of hydrogen absorption and desorption, the three catalysts exhibit different phase transitions, namely DyH<ce:inf loc=\\\"post\\\">2</ce:inf>↔DyH<ce:inf loc=\\\"post\\\">3</ce:inf>, ErH<ce:inf loc=\\\"post\\\">2</ce:inf>↔ErH<ce:inf loc=\\\"post\\\">3</ce:inf> and irreversible YbH<ce:inf loc=\\\"post\\\">2</ce:inf>. DyH<ce:inf loc=\\\"post\\\">2</ce:inf>↔DyH<ce:inf loc=\\\"post\\\">3</ce:inf>, ErH<ce:inf loc=\\\"post\\\">2</ce:inf>↔ErH<ce:inf loc=\\\"post\\\">3</ce:inf> phase transitions have the \\\"hydrogen pump\\\" effect, which can effectively improve the hydrogen absorption and desorption kinetic rate of Mg<ce:inf loc=\\\"post\\\">90</ce:inf>Ce<ce:inf loc=\\\"post\\\">5</ce:inf>Y<ce:inf loc=\\\"post\\\">5</ce:inf> alloy. Some nano-rare earth compounds and phase transformation significantly improve the kinetic properties of the alloy. However, the enthalpy change of all three catalytic alloys is around 76 kJ/mol H<ce:inf loc=\\\"post\\\">2</ce:inf>, which is considered only a slight improvement in thermodynamic properties.\",\"PeriodicalId\":20743,\"journal\":{\"name\":\"Process Safety and Environmental Protection\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.9000,\"publicationDate\":\"2024-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Process Safety and Environmental Protection\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.psep.2024.09.061\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Safety and Environmental Protection","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.psep.2024.09.061","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Investigation of microstructure, hydrogen storage performance of Re-Mg-based alloy modified by RE2O3 (RE = Dy, Er, Yb)
In order to further study the hydrogen storage mechanism of Mg-based hydrogen storage materials, Mg90Ce5Y5 alloy was used as the basis, and three kinds of heavy rare earth oxides were doped into the alloy by ball milling technology. The microstructure and hydrogen storage properties were characterized by XRD, SEM, TEM and PCI. The results show that the hydrogen absorption rate and discharge rate of modified Mg90Ce5Y5 alloy are significantly increased, and the performance is Er2O3 > Dy2O3 > Yb2O3. The hydrogen storage capacity of Er2O3 catalyzed samples is 5.02 wt%, which is higher than 4.82 wt% and 4.80 wt% of Dy2O3 and Yb2O3 catalyzed samples. The hydrogen absorption saturation rate of the sample catalyzed by Er2O3 for 2 min is ∼90 %, the complete release of hydrogen only takes 50 min at 573 K, and the dehydrogenation activation energy is 76.9 kJ/mol. The hydrogen absorption and emission rate is fast, and the dehydrogenation activation energy is slightly lower than that of the other two catalysts. In the process of hydrogen absorption and desorption, the three catalysts exhibit different phase transitions, namely DyH2↔DyH3, ErH2↔ErH3 and irreversible YbH2. DyH2↔DyH3, ErH2↔ErH3 phase transitions have the "hydrogen pump" effect, which can effectively improve the hydrogen absorption and desorption kinetic rate of Mg90Ce5Y5 alloy. Some nano-rare earth compounds and phase transformation significantly improve the kinetic properties of the alloy. However, the enthalpy change of all three catalytic alloys is around 76 kJ/mol H2, which is considered only a slight improvement in thermodynamic properties.
期刊介绍:
The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice.
PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers.
PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.