MetalMat最新文献

{"title":"Two-Dimensional Transition Metal Dichalcogenides Properties Enhanced by Nano- and Micro-Scale Shape Control","authors":"C. Grazianetti,&nbsp;G. Zambito,&nbsp;D. Campi,&nbsp;M. C. Giordano,&nbsp;F. Buatier de Mongeot,&nbsp;A. Molle,&nbsp;C. Martella","doi":"10.1002/metm.70030","DOIUrl":"https://doi.org/10.1002/metm.70030","url":null,"abstract":"<p>The outstanding properties of two-dimensional (2D) materials such as transition metal dichalcogenides (TMDs) make them ideal candidates for a wide range of applications in nanotechnology. Beyond their flat 2D nature, reshaping TMD structures in three-dimensional (3D) space further demonstrates their exceptional versatility and reconfigurability. Indeed, manipulating the shape of TMDs by applying strain, patterning, or conformal growth on substrates enables precise control over their properties. In this review, we introduce the concept of “shape control” as a unifying framework that encompasses diverse strategies, such as controlled synthesis, strain and phase engineering, wrinkling, and nanopatterning, which are linked by their common impact on the morphology of TMDs across multiple length scales. By modifying the shape of TMDs, these approaches enable tailored property modulation, opening new opportunities in electronics, photonics, energy conversion, sensing, and beyond. We critically assess the most relevant methodologies, discuss their underlying mechanisms, and highlight the challenges and prospects for advancing shape-engineered TMDs toward their full technological potential.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal Hydrides-Based Hydrogen Purification Systems—A Review","authors":"Cameron Reid,&nbsp;Wei Liu,&nbsp;Kondo-Francois Aguey-Zinsou","doi":"10.1002/metm.70025","DOIUrl":"https://doi.org/10.1002/metm.70025","url":null,"abstract":"<p>This review investigates the critical role of purification for enabling the use of hydrogen from various production pathways. A comparison of purification technologies indicates that metal hydrides-based hydrogen purification processes could offer an effective, energy-efficient, and cost-effective alternative to established pressure swing adsorption methods, with applicability across both small and large industrial scales. Remaining technical challenges to facilitate the translation of metal-hydrides for hydrogen purification are identified. These includes: (i) the development of better impurities-resistant hydrides of high storage capacities and rapid hydrogen kinetics, (ii) alternative pressure vessel materials capable of not only withstanding hydrogen embrittlement (HE) but also impurities driven corrosion, and (iii) better vessels architectures and engineering solutions to minimize the energy required to support metal-hydrides purification process. The need for real-time hydrogen quality monitoring is also emphasized for enhancing recovery rates and operational controls. Finally, a review of commercial products and demonstration projects highlights the potential of metal hydrides for simultaneous hydrogen purification, storage, and transport, outlining the unique capabilities of these materials.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147562774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover","authors":"","doi":"10.1002/metm.70035","DOIUrl":"https://doi.org/10.1002/metm.70035","url":null,"abstract":"<p>\u0000 \u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective Electroreduction of CO2 to Ethanol: Mechanistic Understanding and Catalyst Development","authors":"Suwon Rhi,&nbsp;Sungwook Park,&nbsp;Do Yeon Heo,&nbsp;Soshi Iimura,&nbsp;Soo Young Kim","doi":"10.1002/metm.70024","DOIUrl":"https://doi.org/10.1002/metm.70024","url":null,"abstract":"<p>The electrochemical reduction of carbon dioxide (CO₂RR) has garnered significant attention as a promising strategy for producing carbon-neutral fuels and chemicals using electricity. Among the various possible products, ethanol stands out as a highly attractive target due to its high energy density, low toxicity, and strong demand in the chemical industry. However, achieving selective conversion of CO₂ to ethanol remains a considerable challenge, owing to the complexity of multielectron transfer processes, sluggish reaction kinetics, and the competition between C₁ and C₂ product pathways. In particular, the lack of clear mechanistic understanding regarding the divergence between ethylene and ethanol pathways—both being C₂ products—further complicates selectivity control. This review focuses primarily on recent advances in copper-based electrocatalysts that have demonstrated enhanced selectivity and activity toward ethanol production, while also covering emerging reports on noncopper catalyst systems. We first outline the reaction pathways leading to ethanol from CO₂RR and then categorize catalyst design strategies into several classes, including atomically dispersed Cu sites, dual-atom configurations, copper nanoclusters, Cu–Ag heterojunctions, and surface-modified Cu catalysts. Through comparative analysis of catalyst structure, electronic environment, and product distribution, this review provides mechanistic insights into how specific configurations promote *CO generation, C–C coupling, and subsequent hydrogenation steps toward ethanol. Additionally, tandem catalyst systems that combine *CO-producing components with ethanol-selective centers are discussed to decouple rate-limiting steps and improve overall efficiency. By elucidating structure–function relationships at the atomic level, this review aims to offer a comprehensive perspective for the rational development of CO₂RR systems directed toward practical ethanol production.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electroforming Thin Fe Foils Using ChCl/Urea Deep Eutectic Solvent: Effects of MnCl2 and Current Density on Microstructure and Corrosion Behavior","authors":"Vinicius Sales,&nbsp;Carlo Paternoster,&nbsp;Georgios Kolliopoulos,&nbsp;Lukasz Maj,&nbsp;Magdalena Bieda,&nbsp;Diego Mantovani","doi":"10.1002/metm.70023","DOIUrl":"https://doi.org/10.1002/metm.70023","url":null,"abstract":"<p>Deep eutectic solvents (DESs), a class of ionic liquids, have recently been proposed as promising candidates for metal electrodeposition. Specifically, using DESs over aqueous solutions allows the reduction of metals with negative cathodic potential (i.e., Mn) without significant side reactions, such as the evolution of hydrogen gas, which is responsible for embrittlement phenomena. The current work assessed the nonaqueous electrolytic deposition of Fe and Mn using DESs for temporary biomedical devices (e.g., coronary stents). The DES was obtained by mixing choline chloride (ChCl) and urea. The samples were produced using three current densities (20, 30, and 40 mA/cm²). The surface morphology and chemical composition were assessed by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), electron probe microanalysis (EPMA), and transmission electron microscopy (TEM). Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were performed to study the corrosion behavior of the electroformed samples. TEM and EDX analyses revealed that Mn incorporates into the Fe matrix by doping with Fe₂O₃. A needle-shaped nanostructure is reported for the first time in electroformed Fe. Among the conditions, electroformed samples at 30 mA/cm² present the best compromise between Mn incorporation, microstructural homogeneity, and corrosion resistance, with a rate of 0.41 mm/yr in Hanks' solution. These findings highlight the potential of electroformed Fe-based materials for biodegradable applications through microstructural and compositional control.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Evaluation of Turning AISI 304 Using Minimum Quantity Lubrication With Vegetable-Based Green Cutting Fluids","authors":"Ranjith Ravindran Nair,&nbsp;Praveen Vijayan,&nbsp;Jayesh Shanthi Bhavan,&nbsp;Ajin C. Sajeevan","doi":"10.1002/metm.70029","DOIUrl":"https://doi.org/10.1002/metm.70029","url":null,"abstract":"<p>Cutting fluids play a crucial role in dissipating the heat generated during machining operations, contributing to improved service life and machinability of tools and workpieces. Even though commercially available conventional cutting fluids are effective in serving their intended roles during the machining process, they are non-biodegradable. Previous researchers have introduced a variety of environmentally friendly alternatives, among which green cutting fluids stand out due to their biodegradability and availability. The present study focuses on a comparative assessment of the machining performance of green cutting fluids, made from oil-water emulsions derived from coconut oil, sunflower oil, and palm oil, with a conventional cutting fluid (MAK Sherol B) during the turning operation of AISI 304 stainless steel. Tween 20 is used as the emulsifying agent for preparing oil-water emulsion. The machining performance was investigated by examining the impact of these cutting fluids on cutting speed, feed rate, and depth of cut on tool tip interface temperature, surface roughness, and cutting force during the turning process. Surface roughness values are determined using surface profilometry and Atomic Force Microscopy (AFM). The results indicate that palm oil has rendered the lowest cutting force and cutting temperature with improved surface quality under higher feed rates, cutting speeds, and depths of cut as compared with sunflower oil, coconut oil, and conventional cutting fluid.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring an Optimized Hydrothermal Process to Synthesize Desirable ZnO Nanosheets","authors":"Xiaoyang Wang,&nbsp;Shiping Li,&nbsp;Shiheng Xin,&nbsp;Yanning Yang,&nbsp;Tingting Shao,&nbsp;Fuchun Zhang,&nbsp;Xinghui Liu,&nbsp;Shiguang Shang","doi":"10.1002/metm.70033","DOIUrl":"https://doi.org/10.1002/metm.70033","url":null,"abstract":"<p>ZnO has garnered significant attention in the electronics industry due to its sensitive photoelectric radiation response properties. Herein, ZnO nanosheets prepared under various hydrothermal reaction conditions are analyzed using various characterization techniques to explore the performance enhancement achieved through rational process details. This study reveals the optimized preparation strategy for ZnO nanosheets and provides reference value for the application and property modulation of ZnO materials at a deeper level.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147570369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-Step Solvothermal Synthesis of VS4@PC/rGO for High-Performance Symmetric Supercapacitors","authors":"Zhou Yu,&nbsp;Qiancheng Hao,&nbsp;Shuai Yan,&nbsp;Lingyan Huang,&nbsp;Yonglin Ye,&nbsp;Jijun Tang,&nbsp;Zhenguang Liu,&nbsp;Xuecheng Chen,&nbsp;Shiyun Li","doi":"10.1002/metm.70031","DOIUrl":"https://doi.org/10.1002/metm.70031","url":null,"abstract":"<p>Global fossil fuel depletion and renewable energy intermittency, coupled with the rapid development of portable electronics, drive the demand for high-performance supercapacitors, yet their application is limited by the performance of electrode materials. Transition metal sulfides (TMSs) with high redox activity and unique structures are promising SC electrode candidates, but pristine TMSs suffer from poor conductivity, agglomeration, and cyclic structural degradation. Herein, vanadium tetrasulfide (VS₄) with unique rod-like structure was integrated with porous carbon (PC) and reduced graphene oxide (rGO) to fabricate VS₄@PC/rGO ternary composites via a one-step solvothermal method. PC and rGO uniformly distribute on/around VS₄ rods, forming a skewer-like structure that mitigates agglomeration, enhances the specific surface area, and accelerates ion/electron transport. The VS₄@PC/rGO-25% electrode exhibits the highest specific capacitance of 325.8 F·g⁻¹ at 0.5 A·g⁻¹, outperforming binary VS₄@PC (241 F·g⁻¹) and VS₄@rGO (258 F·g⁻¹). The assembled symmetric supercapacitors deliver 46.1 Wh·kg⁻¹ at 374.8 W·kg⁻¹ and, more notably, maintains exceptional long-cycle stability. After 10,000 charge–discharge cycles, it still retains 86.3% of its initial capacitance with a coulombic efficiency of 96.4%, demonstrating great potential for long-term practical energy storage applications. This work not only highlights the potential of VS₄-a representative TMS as a high-performance electrode material but also provides a generalizable strategy for addressing the intrinsic limitations of TMSs via rational composite design with carbonaceous materials.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advancing Severe Plastic Deformation for Tubular Samples: Systematic Review and Machine Learning Optimization","authors":"Eman M. Zayed,&nbsp;Abdulrahman I. Alateyah,&nbsp;Waleed H. El-Garaihy,&nbsp;Mahmoud Shaban,&nbsp;Majed Alinizzi,&nbsp;Nahed A. El-Mahallawy","doi":"10.1002/metm.70026","DOIUrl":"https://doi.org/10.1002/metm.70026","url":null,"abstract":"<p>Severe Plastic Deformation (SPD) is a widely recognized method for producing ultrafine-grained (UFG) and nano-structured materials with superior mechanical properties by imposing high strains without the need for alloying elements or secondary reinforcements. Although SPD techniques for bulk and sheet materials have been extensively developed, recent advancements have focused on creating effective SPD methods specifically designed for tubular samples. These techniques are critical for industries where lightweight, high-strength tubular components are essential, such as aerospace, automotive, and biomedical sectors. Machine learning (ML) approaches have emerged as powerful tools for optimizing SPD parameters and predicting material behavior. ML involves constructing systems capable of analyzing and identifying patterns in data to make informed decisions, such as supervised and unsupervised learning, which analyze training data to reveal relationships and trends. When dealing with small datasets, cross-validation (CV), particularly k-fold CV, is a reliable technique to prevent overfitting and enhance model robustness. ML and statistical analysis were employed to predict and optimize the input parameters in terms of the plastic strain (PS) and the impact on the improvement of the mechanical properties. This review provides a comprehensive analysis of SPD processes tailored for tubular materials, including methods such as High-Pressure Tube Twisting (HPTT), Accumulative Spin Bonding (ASB), and Parallel Tubular Channel Angular Pressing (PTCAP). Each method is examined in terms of deformation behavior, die design, and microstructural evolution. Additionally, the review addresses critical research gaps, explores potential industrial applications, and highlights how advancements in ML can enhance the understanding and application of SPD techniques, offering insights into scaling up these processes for large-scale production.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147569202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additive Manufacturing of Multimetallic Materials to Achieve Multifunctionality","authors":"Xiao Shang,&nbsp;Evelyn Li,&nbsp;Soumya S. Dash,&nbsp;Ajay Talbot,&nbsp;Yu Zou","doi":"10.1002/metm.70032","DOIUrl":"https://doi.org/10.1002/metm.70032","url":null,"abstract":"<p>Multifunctional materials (MFMs) exhibit multiple useful functions without complex joint mechanisms. Compared with soft MFMs, metallic MFMs are desired due to their superior mechanical properties and durability. However, the design and fabrication of MFMs are daunting tasks, requiring the organic integration of multiple metals and alloys during manufacturing processes. Additive manufacturing, especially directed energy deposition (DED), has the potential in this regard due to its capability to deposit multimaterials site-specifically. Through carefully programmed printing paths, novel applications arise and achieve functionalities unseen before. Here, we showcase the versatility of such techniques by four case studies of metallic MFMs: (i) tuning magnetic lifting force, (ii) securely and durably embedding information as material fingerprints, (iii) improving conventional ferrofluidic seals, and (iv) possessing programmable mechanical properties. This work demonstrates the possibilities of using DED to achieve multifunctionalities in metallic materials and provides enlightenment to a wide range of engineering applications.</p>","PeriodicalId":100919,"journal":{"name":"MetalMat","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/metm.70032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147569723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}