Journal of Magnesium and Alloys最新文献_第4页

Evading efficiency-voltage trade-off in magnesium-air batteries through solute atoms and second phases synergy 通过溶质原子和第二相协同作用避免镁-空气电池中的效率-电压权衡问题

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.01.019

Hongxing Liang , Liang Wu , Chenchen Zhao , Chuantian Zhai , Wenbo Du

{"title":"Evading efficiency-voltage trade-off in magnesium-air batteries through solute atoms and second phases synergy","authors":"Hongxing Liang , Liang Wu , Chenchen Zhao , Chuantian Zhai , Wenbo Du","doi":"10.1016/j.jma.2024.01.019","DOIUrl":"10.1016/j.jma.2024.01.019","url":null,"abstract":"<div><div>The quest for high-energy-density magnesium-air batteries is hindered by the efficiency-voltage trade-off, ultimately leading to an unsatisfactory energy density. Here, we effectively mitigate the inherent efficiency-voltage trade-off by introducing a novel anode material, specifically, Mg-0.5Sn-0.5In-0.5Ga. This anode demonstrates exceptional anodic efficiency, achieving 60.5 ± 2.5% at 1 mA cm<sup>−2</sup>, 65.3 ± 2.7% at 10 mA cm<sup>−2</sup>, and 71.4 ± 1.2% at 20 mA cm<sup>−2</sup>. Furthermore, the discharge voltage is significantly enhanced, reaching 1.76±0.01 V at 1 mA cm<sup>−2</sup>, 1.44±0.02 V at 10 mA cm<sup>−2</sup>, and 1.21±0.08 V at 20 mA cm<sup>−2</sup>. Consequently, our newly developed anode exhibits a remarkable energy density of 2312±98 W h kg<sup>−1</sup>, placing it among the top-performing magnesium anodes documented in the literature. Density functional theory calculations and experimental investigations have unveiled that the exceptional performance can be attributed to the inhibition of water reduction, facilitated by the hybridization between solute atoms and neighboring Mg atoms. Furthermore, the activation of the second phase, introducing additional galvanic couples, significantly contributes to this performance. This study presents valuable insights that can guide the design of novel anodes, contributing to the advancement of high-performance magnesium-air batteries.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 719-730"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139551456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation and solute segregation for an asymmetric tilt boundary on {101¯2} twin boundaries {101¯2}孪生边界上不对称倾斜边界的形成和溶质分离

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.01.026

Qiang Yang , Shuhui Lv , Peng Chen , Zefeng Xie , Shuo Zhou , Xin Qiu

{"title":"Formation and solute segregation for an asymmetric tilt boundary on {101¯2} twin boundaries","authors":"Qiang Yang , Shuhui Lv , Peng Chen , Zefeng Xie , Shuo Zhou , Xin Qiu","doi":"10.1016/j.jma.2024.01.026","DOIUrl":"10.1016/j.jma.2024.01.026","url":null,"abstract":"<div><div>Asymmetric tilt boundaries on conventional twin boundaries (TBs) are significant for understanding the role of twins on coordinating plastic deformation in many metallic alloys. However, the formation modes of many asymmetric tilt boundaries are hard to be accounted for based on traditional theoretical models, and the corresponding solute segregation is complex. Herein, atomic structures of a specific asymmetric boundary on <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow><mo>}</mo></mrow></math></span> TBs were reveled using aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), molecular dynamics (MD) and density functional theory (DFT) simulations. Reaction between <<strong>a</strong><sub>60</sub>><sub>M</sub> dislocations and the <span><math><mrow><mo>{</mo><mrow><mn>10</mn><mover><mn>1</mn><mo>¯</mo></mover><mn>2</mn></mrow><mo>}</mo></mrow></math></span> TB can generate a ∼61°/25° asymmetric tilt boundary. The segregation of Gd and Zn atoms is closely related to the aggregated <<strong>a</strong>> dislocations and the interfacial interstices of the asymmetric tilt boundary, which is energetically favorable in reducing the total system energy.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 583-591"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139917044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LaVO4 prepared by a high–yield method for superior catalysis to the hydrogen storage of MgH2 用高产方法制备的 LaVO4 对 MgH2 的储氢具有卓越的催化作用

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.03.025

Meihong Wu , Mingxia Gao , Shanqing Qu , Yongfeng Liu , Wenping Sun , Xin Zhang , Chu Liang , Xiaoyu Zhang , Yaxiong Yang , Hongge Pan

{"title":"LaVO4 prepared by a high–yield method for superior catalysis to the hydrogen storage of MgH2","authors":"Meihong Wu , Mingxia Gao , Shanqing Qu , Yongfeng Liu , Wenping Sun , Xin Zhang , Chu Liang , Xiaoyu Zhang , Yaxiong Yang , Hongge Pan","doi":"10.1016/j.jma.2024.03.025","DOIUrl":"10.1016/j.jma.2024.03.025","url":null,"abstract":"<div><div>MgH<sub>2</sub> is a promising solid–state hydrogen storage material. However, its high thermodynamics and sluggish kinetics hinder its practical application. Catalytic strategy is effective in improving its kinetic performance. Nevertheless, the highly efficient catalysts or additives are normally of low-yield in fabrication with high cost. In this work, a novel structural LaVO<sub>4</sub> fabricated by a low-cost method of spraying dry followed by a calcination is used as a catalytic additive for the hydrogen storage of MgH<sub>2</sub>. With an optimized addition of LaVO<sub>4</sub>, the overall hydrogen storage performances of MgH<sub>2</sub> are significantly improved. An onset dehydrogenation temperature of only 183°C is obtained after an initial activation of dehydrogenation and hydrogenation. The system can desorb 5.7 wt% H<sub>2</sub> at 250°C within 10 min and maintains a dehydrogenation capacity of 5.0 wt% H<sub>2</sub> after 50 cycles. It is found that LaVO<sub>4</sub> is transferred to lanthanum hydride and metallic vanadium in the initial dehydrogenation process, the former acts as a highly effective catalyst for the hydrogen storage of MgH<sub>2</sub> and the latter undergoes reversible hydrogenation and dehydrogenation in the subsequent cycles. The structural design of the catalyst and its scalable fabrication are highly valuable in realizing the practical application of catalytic strategy for the hydrogen storage of MgH<sub>2</sub>.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 613-625"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140791052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Revealing Hetero-Deformation Induced (HDI) Hardening and Dislocation Activity in a Dual-Heterostructure Magnesium Matrix Composite 揭示双异质结构镁基复合材料中的异质变形诱导（HDI）硬化和位错活性

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.10.012

Lingling Fan , Ran Ni , Lingbao Ren , Peng Xiao , Ying Zeng , Dongdi Yin , Hajo Dieringa , Yuanding Huang , Gaofeng Quan , Wei Feng

{"title":"Revealing Hetero-Deformation Induced (HDI) Hardening and Dislocation Activity in a Dual-Heterostructure Magnesium Matrix Composite","authors":"Lingling Fan , Ran Ni , Lingbao Ren , Peng Xiao , Ying Zeng , Dongdi Yin , Hajo Dieringa , Yuanding Huang , Gaofeng Quan , Wei Feng","doi":"10.1016/j.jma.2024.10.012","DOIUrl":"10.1016/j.jma.2024.10.012","url":null,"abstract":"<div><div>Integrating a heterogeneous structure can significantly enhance the strength-ductility synergy of composites. However, the relationship between hetero-deformation induced (HDI) strain hardening and dislocation activity caused by heterogeneous structures in the magnesium matrix composite remains unclear. In this study, a dual-heterogeneous TiC/AZ61 composite exhibits significantly improved plastic elongation (PEL) by nearly one time compared to uniform FG composite, meanwhile maintaining a high strength (UTS: 417 MPa). This is because more severe deformation inhomogeneity in heterogeneous structure leads to more geometrically necessary dislocations (GNDs) accumulation and stronger HDI stress, resulting in higher HDI hardening compared to FG and CG composites. During the early stage of plastic deformation, the pile-up types of GND in the FG zone and CG zone are significantly different. GNDs tend to form substructures in the FG zone instead of the CG zone. They only accumulate at grain boundaries of the CG region, thereby leading to obviously increased back stress in the CG region. In the late deformation stage, the elevated HDI stress activates the new 〈<em>c + a〉</em> dislocations in the CG region, resulting in dislocation entanglements and even the formation of substructures, further driving the high hardening in the heterogeneous composite. However, For CG composite, 〈<em>c + a〉</em> dislocations are not activated even under large plastic strains, and only 〈<em>a〉</em> dislocations pile up at grain boundaries and twin boundaries. Our work provides an in-depth understanding of dislocation variation and HDI hardening in heterogeneous magnesium-based composites.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 902-921"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An ultra-high strength and toughness as-cast Mg-10Gd-1.7Y-1Zn-0.5Zr alloy 一种超高强度和韧性的铸造镁-10钆-1.7Y-1锌-0.5锆合金

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.01.010

Haijun Wang , Renju Cheng , Bin Jiang , Mingbo Yang , Daiyi Deng , Zhihua Dong , Jiangfeng Song , Chuntang Yu , Linjiang Chai , Fusheng Pan

{"title":"An ultra-high strength and toughness as-cast Mg-10Gd-1.7Y-1Zn-0.5Zr alloy","authors":"Haijun Wang , Renju Cheng , Bin Jiang , Mingbo Yang , Daiyi Deng , Zhihua Dong , Jiangfeng Song , Chuntang Yu , Linjiang Chai , Fusheng Pan","doi":"10.1016/j.jma.2024.01.010","DOIUrl":"10.1016/j.jma.2024.01.010","url":null,"abstract":"<div><div>An ultra-high strength and toughness as-cast Mg-10Gd-1.7Y-1Zn-0.5Zr (wt.%) alloy was prepared via special ultrasonic melt treatment, and the peak-aged (200 ℃ for 48 h) ultimate tensile strength (UTS), yield strength (YS) and elongation (EL) at room temperature reaches 430 MPa, 324 MPa, and 13.6%, respectively. The ultrasonic treatment during semi-solid conditions refines the grains and hinders the growth of the divorced eutectic phases (α-Mg + Mg<sub>3</sub>Gd) during casting. During the solution treatment, the refined Mg<sub>3</sub>Gd phase suppresses the formation of cubic-shaped GdY phases and block 14H long period stacking structure (14H-LPSO) phases, and further increases solute concentration in the matrix. More solute atoms promote the growth of β′ plates with an increased aspect ratio of 8:1, which can increase critical resolved shear stress (CRSS), YS and work hardening rate. It is that found the aspect ratio of β′ plates are mainly responsible for the improvement in the strength of the alloy under the same composition and heat treatment conditions.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 894-901"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139551458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exceptional mechanical properties of wire arc additive manufactured Mg-9Gd-3Y-0.5Zr alloy induced by promoted precipitation behavior 促进沉淀行为诱导线弧添加剂制造的 Mg-9Gd-3Y-0.5Zr 合金具有优异的机械性能

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2024.01.027

Junmin Zhan , Guohua Wu , Xin Tong , Fangzhou Qi , Qiman Wang , Rui Jiang , Youjie Guo , Zhanyong Zhao , Peikang Bai

{"title":"Exceptional mechanical properties of wire arc additive manufactured Mg-9Gd-3Y-0.5Zr alloy induced by promoted precipitation behavior","authors":"Junmin Zhan , Guohua Wu , Xin Tong , Fangzhou Qi , Qiman Wang , Rui Jiang , Youjie Guo , Zhanyong Zhao , Peikang Bai","doi":"10.1016/j.jma.2024.01.027","DOIUrl":"10.1016/j.jma.2024.01.027","url":null,"abstract":"<div><div>Additive manufactured Mg-RE alloys usually show exceptional mechanical properties, which is mainly attributed to their refined grains in previous studies. Since Mg-RE series are typical age-hardenable alloys, this study focuses on the aging behavior of wire arc additive manufactured Mg-9Gd-3Y-0.5Zr (GW93K) alloy and compares it with the as-cast counterpart, providing a new insight into the strengthening mechanism of additive manufactured alloys. It was revealed that both the refined equiaxed α-Mg grains and small-sized (only 5∼10 nm) β′ precipitates with an extremely high number density (∼2.53 × 10<sup>4</sup> µm<sup>−2</sup>) should be considered for the strengthening mechanisms of the deposited alloy. The promoted precipitation behavior is facilitated by the dislocation pile-ups formed under multiple thermal cycles and a high cooling rate during deposition. As a result, the deposited alloy at peak-aged state exhibits better comprehensive properties of UTS=392 MPa and EL=3.3%, which is 19% and 18% higher than that of the cast sample, individually.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 562-570"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139943493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advancements in the design of micro/nanostructured superhydrophobic surfaces on magnesium alloys

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2025.01.013

Sihui Ouyang , Fengyi Wang , Jia She , Liying Qiao , Ao Fu , Xianhua Chen , Fusheng Pan

{"title":"Recent advancements in the design of micro/nanostructured superhydrophobic surfaces on magnesium alloys","authors":"Sihui Ouyang , Fengyi Wang , Jia She , Liying Qiao , Ao Fu , Xianhua Chen , Fusheng Pan","doi":"10.1016/j.jma.2025.01.013","DOIUrl":"10.1016/j.jma.2025.01.013","url":null,"abstract":"<div><div>As one of the lightest engineering materials, magnesium (Mg) alloy possesses excellent mechanical performance, meeting the needs of versatile engineering fields and holding the potential to address cutting-edge issues in aerospace, electronics, biomedicine. The design of superhydrophobic (SHB) surfaces with micro and nanostructures can endow Mg alloys with multiple functionalities, such as self-cleaning, self-healing, antibacterial, and corrosion resistance. Over the past decade, researchers have drawn inspiration from nature to implement biomimetic design principles, resulting in the rapid development of micro/nanostructured SHB surfaces on Mg alloys, which hold great promise for biomedical applications. This review comprehensively introduces the biomimetic design principles of micro/nanostructured SHB surfaces on Mg alloys, discusses the challenges along with advantages and disadvantages of current preparation methods, and explores the future perspectives for preparing these SHB surfaces, providing strategies to enhance their performance in biomedical applications.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 457-485"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diabolical ironclad beetle elytra-inspired flexible WE43 magnesium endovascular stent structures and their biomechanical potential

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2025.01.017

Il Won Suh , Jinwoo Kim , Sieb Chanchamnan , Se Rim Jang , Esensil Man Hia , Chan Hee Park , Cheol Sang Kim

{"title":"Diabolical ironclad beetle elytra-inspired flexible WE43 magnesium endovascular stent structures and their biomechanical potential","authors":"Il Won Suh , Jinwoo Kim , Sieb Chanchamnan , Se Rim Jang , Esensil Man Hia , Chan Hee Park , Cheol Sang Kim","doi":"10.1016/j.jma.2025.01.017","DOIUrl":"10.1016/j.jma.2025.01.017","url":null,"abstract":"<div><div>Nature-inspired designs have increasingly influenced biomedical engineering by providing superior biomechanical performance and structural stability. In this study, the diabolical ironclad beetle elytra structure was applied to stent strut designs and thoroughly evaluated through various computational simulations to assess their potential to enhance the mechanical performance of WE43 magnesium alloy stents. Connected elliptical structures with a vertical-to-horizontal length ratio of 1:1.8 were incorporated in varying numbers and then compared to conventional laser-cut stents using 3-point bending, crush, crimping, and expansion tests, internal carotid artery insertion simulations, and computational fluid dynamics analyses. The results demonstrated that the biomimetic stents exhibited significantly improved stress distribution and reduced applied stress while maintaining hemodynamic stability. Computational fluid dynamics simulations further confirmed that the biomimetic could reduce wall shear stress and improve blood flow, thereby potentially minimizing the risk of restenosis and thrombosis. These findings suggest that diabolical ironclad beetle-inspired stent structures may offer enhanced biomechanical performance and clinical safety in magnesium-based endovascular interventions.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 709-718"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comprehensive review on Mg-based materials as filler in mixed matrix membranes for CO2 separation

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2025.01.018

Payam Veisi , Alireza Askari , Arash Fattah-alhosseini

{"title":"A comprehensive review on Mg-based materials as filler in mixed matrix membranes for CO2 separation","authors":"Payam Veisi , Alireza Askari , Arash Fattah-alhosseini","doi":"10.1016/j.jma.2025.01.018","DOIUrl":"10.1016/j.jma.2025.01.018","url":null,"abstract":"<div><div>The crisis of excessive increase in CO<sub>2</sub> emissions has quickly become a serious issue and requires low-cost and bio-compatible solutions. The employee of membrane technology for CO<sub>2</sub> gas separation has garnered significant interest among researchers. However, this method encounters challenges related to selectivity and permeability. Therefore, modifying and reinforcing the polymer membranes to improve gas separation performance seems essential. Among the various methods for polymer membrane modification, modification with magnesium-based fillers to prepare a mixed matrix membrane (MMM) is considered an efficient method. Owing to magnesium metal's low weight, low density, high strength, and good selectivity, magnesium-based materials (Mg-based materials) have more porosity, higher available surface area, more adsorption sites, lighter weight, and more gas absorption tendency than other fillers, which makes them an attractive choice for the preparation of gas separation MMMs. This research deals with the introduction of Mg-based materials, various methods of synthesis of Mg-based materials, different methods of introducing Mg-based materials into the membrane matrix, and their effect on the performance of MMMs in CO<sub>2</sub> gas separation applications. Therefore, this review can provide researchers with light horizons in using the high potential of Mg-based materials as efficient fillers in MMMs to achieve excellent permeability and selectivity and generally improve their performance in CO<sub>2</sub> gas separation applications.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 539-561"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143072179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The anionic Tx defects of Nb2CTx MXene as the effective catalytically active center for the Mg-based hydrogen storage materials Nb2CTx MXene的阴离子Tx缺陷作为镁基储氢材料的有效催化活性中心

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2025-02-01 DOI: 10.1016/j.jma.2023.09.016

Xiang Zhou , Haotian Guan , Heng Lu , Yangfan Lu , Jianbo Li , Jingfeng Wang , Yu'an Chen , Qian Li , Fusheng Pan

{"title":"The anionic Tx defects of Nb2CTx MXene as the effective catalytically active center for the Mg-based hydrogen storage materials","authors":"Xiang Zhou , Haotian Guan , Heng Lu , Yangfan Lu , Jianbo Li , Jingfeng Wang , Yu'an Chen , Qian Li , Fusheng Pan","doi":"10.1016/j.jma.2023.09.016","DOIUrl":"10.1016/j.jma.2023.09.016","url":null,"abstract":"<div><div>While early transition metal-based materials, such as MXene, has emerged as an efficient catalyst for the Mg-based hydrogen storage materials, their strong interaction with hydrogen resulted in the high hydrogen diffusion barrier, hindering further improvement of catalytic activity. A MXene is characterized by rich anionic groups on its surface, significantly affecting electronic and catalytic functionalities. Using Nb<sub>2</sub>C<em>T</em><sub>x</sub> as an example, we herein illustrate the critical role of anionic <em>T</em><sub>x</sub> defects on controlling hydrogen dissociation and diffusion processes in Mg-based hydrogen storage materials. The hydrogen desorption properties of MgH<sub>2</sub> can be significantly enhanced by utilizing <em>T</em><sub>x</sub> controllable Nb<sub>2</sub>C<em>T</em><sub>x</sub>, and it can release 3.57 wt.% hydrogen within 10 min under 240 °C with the reduced dehydrogenation activation barrier. It also realized stable de/hydrogenation reactions for at least 50 cycles. DFT studies combined with kinetic analysis revealed that the catalyst‒hydrogen interaction could be systematically controlled by optimizing surface <em>T</em><sub>x</sub> defect density, accelerating the hydrogen dissociation and diffusion processes at the same time. These results demonstrate that the <em>T</em><sub>x</sub> defects serve as the effective catalytically active centers of Nb<sub>2</sub>C<em>T</em><sub>x</sub>, offering a flexible catalyst design guideline.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 2","pages":"Pages 571-582"},"PeriodicalIF":15.8,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71417746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0