IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2025-05-10 DOI: 10.1016/j.apsusc.2025.163472

Lu Liu, Shiwei Huang, Kaiting Cao, Qiming Wang, Shengguo Xue, Hao Xu, Weichun Yang

{"title":"Phosphorylated ZVI composites with self-activating interfaces: Synergistic multi-metal removal via in-situ Fe-Cu galvanic coupling and Zn-mediated passivation inhibition","authors":"Lu Liu, Shiwei Huang, Kaiting Cao, Qiming Wang, Shengguo Xue, Hao Xu, Weichun Yang","doi":"10.1016/j.apsusc.2025.163472","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163472","url":null,"abstract":"Zero-valent iron (ZVI) is recognized as an eco-friendly material for heavy metal remediation, yet its application was constrained by surface passivation. A mechanical ball milling method was utilized to synthesize phosphorylated ZVI (ZVI/PR) through incorporation of natural phosphate rock (PR), where PO43--induced corrosion was harnessed to enhance sustained Fe(II) release. The ZVI/PR removed 70 % Cr(VI) within 24 h in the single-metal system, which was significantly increased to 97 % and 77 % in Cu(II)-Cr(VI) and Zn(II)-Cr(VI) binary-metal system, respectively. The apparent reaction rate constants increased by 1.4 and 4.34 times with the presence of Zn(II) and Cu(II). Mechanistic investigations revealed two synergistic pathways: 1) Cu(II) was adsorbed and reduced to Cu(0) onto the ZVI/PR surface forming Fe-Cu bimetallic interfaces, which established galvanic cells that enhanced electron transfer; 2) Zn(II) inhibited the formation of Fe3+ oxide layer, preserving reactive sites and reducing passivation. This dual mechanism facilitated simultaneous removal of Cu(II)/Zn(II)/Cr(VI) through synergistic redox and adsorption processes. The use of industrial byproduct phosphate rock, combined with mechanochemical activation, presented a cost-effective surface engineering strategy. This approach enabled multi-contaminant remediation via controlled interfacial corrosion and modulated electron transfer of ZVI.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"78 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monolayer Covalent C60 Networks Anchored with Uniform Ultrasmall Iridium Nanoparticles for Boosting Electrocatalytic Hydrogen Evolution 均匀超小铱纳米颗粒锚定的单层共价C60网络促进电催化析氢

IF 17.1 1区材料科学

ACS Nano Pub Date : 2025-05-10 DOI: 10.1021/acsnano.5c02796

Chenyu Huang, Taotao Wang, Xing Wang, Muqing Chen, Shangfeng Yang, Pingwu Du

{"title":"Monolayer Covalent C60 Networks Anchored with Uniform Ultrasmall Iridium Nanoparticles for Boosting Electrocatalytic Hydrogen Evolution","authors":"Chenyu Huang, Taotao Wang, Xing Wang, Muqing Chen, Shangfeng Yang, Pingwu Du","doi":"10.1021/acsnano.5c02796","DOIUrl":"https://doi.org/10.1021/acsnano.5c02796","url":null,"abstract":"The design of highly active and durable acidic hydrogen evolution reaction (HER) electrocatalysts remains a critical challenge for advancing hydrogen production technologies. Monolayer graphullerene, a two-dimensional (2D) carbon network derived from C60 fullerenes, exhibits exceptional properties such as structural stability, high specific surface area, superior in-plane electron conductivity, and distinctive electron-accepting behavior, positioning it as an ideal catalyst support. In this work, we report the synthesis of ultrafine iridium nanoparticles (∼1.7 nm) anchored on monolayer graphullerene (Ir NP@MLG) and demonstrate its excellent HER performance in acidic media. Comprehensive morphological and structural analyses confirm the atomic-scale dispersion of Ir nanoparticles on the monolayer graphullerene framework. The Ir NP@MLG hybrid catalyst achieves excellent HER activity with an ultralow overpotential of η10 = 18 mV (vs RHE) and a Tafel slope of 16.54 mV dec–1, surpassing most reported Ir-based catalysts. Notably, it exhibits a mass activity of 3.48 A mg–1 at an overpotential of −50 mV (vs RHE), representing one of the highest values among state-of-the-art Ir catalysts. Stability tests reveal exceptional durability, with negligible activity loss after 260 h of continuous operation. The superior performance originates from (1) the monolayer graphullerene’s 2D conductive network facilitating rapid charge transfer and (2) strong metal–support interactions optimizing electronic structure and nanoparticle stabilization. This study establishes monolayer graphullerene as an interesting carbon support for developing electrocatalysts, providing deep insights into the design of efficient hydrogen energy systems.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"9 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential profile of electrolytic cell and influence of electrolyte resistance in three-electrode electrochemical testing 电解池电位分布及其对三电极电化学测试中电解质电阻的影响

IF 6.6 3区材料科学

Electrochimica Acta Pub Date : 2025-05-10 DOI: 10.1016/j.electacta.2025.146428

Chengwei Shen, Ping Zhou, Dongming Guo

{"title":"Potential profile of electrolytic cell and influence of electrolyte resistance in three-electrode electrochemical testing","authors":"Chengwei Shen, Ping Zhou, Dongming Guo","doi":"10.1016/j.electacta.2025.146428","DOIUrl":"https://doi.org/10.1016/j.electacta.2025.146428","url":null,"abstract":"Electrochemical simulation model along with its underlying theories, have been widely applied in various engineering fields. While electrochemical simulation models provide valuable insights, errors in analysis due to overlooked preconditions, inappropriate data treatments, and misunderstood concepts may compromise model accuracy and actual practical applicability. Based on the measurement principles of electrochemical workstations, this study explains the true significance of the data obtained from electrochemical measurements and analyzes the sources of errors. A one-dimensional three-electrode electrolytic cell model is established to simulate the potential profile across the entire electrolytic cell, and the difference between the measured value and the theoretical value is explained. Furthermore, a flat-plate corrosion electrolytic cell with an adjustable reference electrode position is designed. By comparing actual electrochemical measurements with three-dimensional electrolytic cell simulation under identical condition, the impact of changes in reference electrode position on electrolyte resistance, potential profile, and electrochemical test results is investigated. Finally, strategies for minimizing or correcting measurement errors are proposed to obtain more accurate electrochemical parameters, thereby improving the precision of simulation model.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":"44 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning-accelerated prediction of mechanical and microstructural properties of BCC Fe–Cr–Ni–Al high-entropy alloys across the full compositional space BCC Fe-Cr-Ni-Al高熵合金全成分空间力学和显微组织性能的机器学习加速预测

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-05-10 DOI: 10.1016/j.intermet.2025.108827

Jingteng Xue , Jingtao Huang , Zhonghong Lai , Nan Qu , Yong Liu , Jingchuan Zhu

{"title":"Machine learning-accelerated prediction of mechanical and microstructural properties of BCC Fe–Cr–Ni–Al high-entropy alloys across the full compositional space","authors":"Jingteng Xue , Jingtao Huang , Zhonghong Lai , Nan Qu , Yong Liu , Jingchuan Zhu","doi":"10.1016/j.intermet.2025.108827","DOIUrl":"10.1016/j.intermet.2025.108827","url":null,"abstract":"<div><div>This study employs machine learning to accelerate the computation of mechanical properties and microstructural characteristics of BCC FeCrNiAl high-entropy alloys across the entire compositional range. Initially, 49 representative compositional points were selected within the compositional space, encompassing unary to quaternary alloys. Based on ab initio calculations using density functional theory, theoretical Young's modulus, bulk modulus, brittleness-toughness indicators, deviation of atomic positions, shape deformation ratio, and density were obtained. The Categorical Boosting algorithm was then used to develop a composition-property model, predicting properties across the full compositional space. Alloy properties were mapped onto a 2-D plane for systematic analysis, and the SHAP method was used to quantify the influence of individual elements. It was found that fine-tuning the composition can achieve simultaneous optimization of strength and toughness. Specifically, adjusting the Cr content at high FeNi levels effectively enhances ductility, while keeping Al content within the maximum permissible range is crucial for engineering applications that require a balance between strength and density. Further exploration was conducted on the characteristics of the FeAl(CrNi)x series alloys. This study highlights the potential of machine learning to accelerate ab initio calculations methods for complex alloys, improving efficiency and providing a basis for designing and optimizing FeCrNiAl HEAs.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"183 ","pages":"Article 108827"},"PeriodicalIF":4.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface energy governs the electrical conductivity of polymer-matrix composites 表面能决定聚合物基复合材料的导电性

IF 23.2 2区材料科学

Advanced Composites and Hybrid Materials Pub Date : 2025-05-10 DOI: 10.1007/s42114-025-01313-1

Mohamad Alayli, K. P. Faseela, Seunghyun Baik

{"title":"Surface energy governs the electrical conductivity of polymer-matrix composites","authors":"Mohamad Alayli, K. P. Faseela, Seunghyun Baik","doi":"10.1007/s42114-025-01313-1","DOIUrl":"10.1007/s42114-025-01313-1","url":null,"abstract":"<div>The electrical conductivity (σ) of composites varies significantly depending on matrix polymer even when identical conductive fillers are employed. Here we elucidate the governing parameter of the filler–polymer interaction and σ of composites. The σ of the AgPolymer composites, synthesized by dispersing silver flakes (AgFLs) in different elastomer, thermoplastic, or thermoset polymers, varies by more than an order of magnitude in spite of the identical filler concentration (35 vol%). Although elastic modulus (E, related to the bond stiffness) and fracture energy (G, corresponding to the energy absorbed during bond cleavage) offer some insights, they are insufficient to fully elucidate the filler–polymer interaction. The excessive interaction between the AgFLs and poly-vinyl alcohol leads to the deviation from the σ-E and σ-G relationships of other AgPolymer composites. Surprisingly, the surface energy (γ) of composites (20.4–41.7 mJ m−2), obtained by the van Oss-Good model, is found to govern the σ of composites (1,598.4–36,508.0 S cm−1) without an outlier. The dispersive and polar components of the γ of AgFLs and polymer determine the filler–polymer interaction, AgFL dispersion, and σ of composites. The σ can also be predicted using the intrinsic γ of AgFLs and polymers, before synthesizing composites, which is useful for the future composite design.</div>","PeriodicalId":7220,"journal":{"name":"Advanced Composites and Hybrid Materials","volume":"8 3","pages":""},"PeriodicalIF":23.2,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s42114-025-01313-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Pt(II) as an active site supported on superhydrophilic nickel foam with boosted electrocatalytic hydrogen evolution performance Pt（II）作为活性位点负载在超亲水性泡沫镍上，提高了电催化析氢性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2025-05-10 DOI: 10.1039/d4ta09010a

Yi Wei, Caleb Gyan-Barimah, Linig Li, Jong Hun Sung, Muhammad Irfansyah Maulana, Ha-Young Lee, Chao Han, Jong-Sung Yu

{"title":"Pt(II) as an active site supported on superhydrophilic nickel foam with boosted electrocatalytic hydrogen evolution performance","authors":"Yi Wei, Caleb Gyan-Barimah, Linig Li, Jong Hun Sung, Muhammad Irfansyah Maulana, Ha-Young Lee, Chao Han, Jong-Sung Yu","doi":"10.1039/d4ta09010a","DOIUrl":"https://doi.org/10.1039/d4ta09010a","url":null,"abstract":"In the search for a viable power to hydrogen conversion technology, the electrochemical hydrogen evolution reaction (HER) promises to be the future. However, the rational design of highly active and durable electrocatalysts for this system remains a challenge. Here, we introduce Pt(II) species supported on binder-free superhydrophilic nickel foam (NiF(H)) as an HER electrocatalyst. We show that the superhydrophilic layer on the surface of Pt(II)/NiF(H) enhances the detachment of hydrogen bubbles from the surface of the electrode and also decreases the resistances emanating from the Volmer and Heyrovsky steps. In-situ Raman spectra results indicate that Pt(II)/NiF(H) can effectively accelerate water adsorption and dissociation steps. Density functional theory(DFT) calculations demonstrate that the surface of Pt(II)/NiF(H) can effectively tune the hydrogen adsorption-free energy to a favorable value, improving the HER activity. In addition, the superhydrophilic layer acts as a platform that can fully stabilize the Pt(II) species in the long-term HER process. The Pt(II)/NiF(H) catalyst is more active than a commercial Pt/C(20%) and other control samples, exhibiting a small overpotential (η) of 26 mV to drive a current density of 10 mA cm-2. In addition, the Pt(II)/NiF(H) achieves high mass activities of 8.9 A mgPt-1 at overpotentials of 100 mV, indicating a high utilization of Pt. This work provides a feasible constructive guideline for the rational design of an advanced high-valence-state Pt-based electrocatalyst for HER.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"126 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metastable Rutile TiO2 Growth on Non‐Lattice‐Matched Substrates via a Sacrificial Layer Strategy 通过牺牲层策略在非晶格匹配衬底上生长亚稳金红石型TiO2

IF 13.3 2区材料科学

Small Pub Date : 2025-05-10 DOI: 10.1002/smll.202502409

Jihoon Jeon, Myoungsu Jang, Seungwan Ye, Taeseok Kim, Sung‐Chul Kim, Sung Ok Won, Seong Keun Kim

{"title":"Metastable Rutile TiO2 Growth on Non‐Lattice‐Matched Substrates via a Sacrificial Layer Strategy","authors":"Jihoon Jeon, Myoungsu Jang, Seungwan Ye, Taeseok Kim, Sung‐Chul Kim, Sung Ok Won, Seong Keun Kim","doi":"10.1002/smll.202502409","DOIUrl":"https://doi.org/10.1002/smll.202502409","url":null,"abstract":"Metastable materials possess unique properties critical for advanced technologies; however, their synthesis is significantly challenging. Among the TiO2 polymorphs, rutile TiO2 stands out for its exceptional dielectric properties; however, its film growth typically requires high‐temperatures or lattice‐matched substrates, limiting its practical applications. This article presents a novel sacrificial layer strategy for the atomic layer deposition (ALD) of pure‐phase rutile TiO2 films on diverse substrates, including amorphous Al2O3, HfO2, and ZrO2. This approach employs ultrathin Ru sacrificial layers to facilitate the formation of rutile TiO2 seed layers via the in situ generation of a rutile‐matched RuO2 lattice. At the same time, it is completely removed as volatile RuO4 under exposure to O3 during the ALD process. This approach eliminates the need for high‐temperature annealing and substrate restrictions, enabling low‐temperature formation of rutile TiO2 on diverse substrates, including amorphous oxides. Comprehensive characterization reveals the structural stability of the films and their enhanced dielectric performance. Stabilizing rutile TiO2 independently of the underlying layer opens new possibilities for its integration into memory capacitors. Furthermore, this strategy provides a versatile framework for stabilizing other metastable material phases, thereby offering opportunities for diverse applications.","PeriodicalId":228,"journal":{"name":"Small","volume":"10 1","pages":""},"PeriodicalIF":13.3,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Asymmetric Non-Fullerene Acceptors with Balanced crystallization Kinetics Enabling Trade-Off between Charge generation and Recombination in Ternary Organic Solar Cells 具有平衡结晶动力学的非对称富勒烯受体在三元有机太阳能电池中实现电荷产生和重组之间的权衡

IF 32.5 1区材料科学

Energy & Environmental Science Pub Date : 2025-05-10 DOI: 10.1039/d5ee01604e

Xiaoqi Yu, Jintao Zhu, Lin Xie, Haotian Hu, Tongqiang Liu, Pengfei Ding, Xueliang Yu, Jinfeng Ge, Chengcheng Han, Wei Song, Ziyi Ge

{"title":"Asymmetric Non-Fullerene Acceptors with Balanced crystallization Kinetics Enabling Trade-Off between Charge generation and Recombination in Ternary Organic Solar Cells","authors":"Xiaoqi Yu, Jintao Zhu, Lin Xie, Haotian Hu, Tongqiang Liu, Pengfei Ding, Xueliang Yu, Jinfeng Ge, Chengcheng Han, Wei Song, Ziyi Ge","doi":"10.1039/d5ee01604e","DOIUrl":"https://doi.org/10.1039/d5ee01604e","url":null,"abstract":"The ternary strategy is an effective approach to enhancing luminescent properties and mitigating non-radiative recombination. However, achieving a simultaneous reduction in non-radiative recombination without sacrificing charge generation in organic solar cells (OSCs) remains a challenge. To address this, we designed two novel non-fullerene acceptors (NFAs) based on a quinoxaline core: asymmetric YQX-1O with a single branched alkoxy side chain and symmetric YQX-2O with dual branched alkoxy side chains. YQX-1O exhibits a wider bandgap and superior miscibility with the host acceptor, enabling balanced crystallization kinetics and an optimized blend morphology. This results in simultaneous enhancement of and short-circuit current density , leading to a remarkable power conversion efficiency (PCE) of 20.0% in PM6:BTP-eC9:YQX-1O-based devices, with an improved of 0.864 V, a high of 29.25 mA cm⁻², and an FF of 79.05%. In contrast, YQX-2O, despite its wider bandgap, exhibits excessive molecular planarity and stronger self-aggregation, leading to unfavorable phase separation and limited device performance improvement. Our results highlight the critical role of asymmetric branched alkoxy side chains in regulating crystallization kinetics, which optimizes charge generation while suppressing charge recombination. Theoretical studies further confirm that balancing charge generation and recombination is key to optimal device performance.","PeriodicalId":72,"journal":{"name":"Energy & Environmental Science","volume":"29 1","pages":""},"PeriodicalIF":32.5,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143930831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ Dual Conductive Composite Electrolyte for Low Temperature (430-520 °C) Solid Oxide Fuel Cells 低温（430-520℃）固体氧化物燃料电池用BaCe0.8Y0.2O3−δ- ce0.8 sm0.2 o2−δ双导电复合电解质的优化

IF 6.2 2区材料科学

Journal of Alloys and Compounds Pub Date : 2025-05-10 DOI: 10.1016/j.jallcom.2025.180854

Ji Yu, Yongtao Huang, Jie Zheng, Ning Tian

{"title":"Optimization of BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ Dual Conductive Composite Electrolyte for Low Temperature (430-520 °C) Solid Oxide Fuel Cells","authors":"Ji Yu, Yongtao Huang, Jie Zheng, Ning Tian","doi":"10.1016/j.jallcom.2025.180854","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.180854","url":null,"abstract":"This study systematically investigates the development and optimization of BCY-SDC (BaCe0.8Y0.2O3−δ-Ce0.8Sm0.2O2−δ) composite electrolytes for low-temperature solid oxide fuel cells (SOFCs). Through the controlled synthesis of varying BCY/SDC mass ratios (1:9 to 5:5), the structural, interfacial, and electrochemical properties were comprehensively characterized. The 3BCY-7SDC composite exhibited superior performance, achieving a peak power density of 786 mW/cm2 at 520°C and maintaining 723 mW/cm2 at 490°C, attributed to its homogeneous heterostructure and optimized ionic transport. The built-in electric field (BIEF) at BCY/SDC heterojunctions suppressed electronic conduction while enhancing O2− mobility. Elemental mapping confirmed the uniform distribution of Ba, Ce, Sm, Y, and O, stabilizing the heterophase boundaries. Impedance analysis demonstrated minimized ohmic impedance (0.194 Ω·cm2) and polarization impedance for 3BCY-7SDC, correlating with its exceptional low-temperature performance. These findings establish BCY-SDC composites as promising candidates for next-generation SOFCs operating below 600°C.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"109 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combined measurements of composition-dependent tracer-, impurity- and intrinsic diffusion coefficients and atomic correlation factors from a binary diffusion couple 二元扩散偶联中示踪剂、杂质和本征扩散系数和原子相关因子的组合测量

IF 9.4 1区材料科学

Acta Materialia Pub Date : 2025-05-10 DOI: 10.1016/j.actamat.2025.121088

Neelamegan Esakkiraja, Jasper Berndt, Stephan Klemme, Gerhard Wilde, Aloke Paul, Sergiy V. Divinski

{"title":"Combined measurements of composition-dependent tracer-, impurity- and intrinsic diffusion coefficients and atomic correlation factors from a binary diffusion couple","authors":"Neelamegan Esakkiraja, Jasper Berndt, Stephan Klemme, Gerhard Wilde, Aloke Paul, Sergiy V. Divinski","doi":"10.1016/j.actamat.2025.121088","DOIUrl":"https://doi.org/10.1016/j.actamat.2025.121088","url":null,"abstract":"A fundamental understanding of atomic diffusion is crucial for technological advances in the application of multi-component alloys. The augmented tracer-interdiffusion couple approach provides the composition-dependent tracer diffusion coefficients (mobilities) along the whole diffusion path. This study introduces a novel methodology for accessing the vacancy flux calculations in a diffusion couple, substantiating a rich variety of the diffusion parameters accessible by a single diffusion couple experiment aside of the interdiffusion coefficients. We demonstrate that the composition-dependent thermodynamic factors and Manning’s factors can be estimated using this approach. Furthermore, the composition-dependent correlation factors of the diffusing elements in a diffusion couple are estimated for the first time. A modified tracer-interdiffusion couple approach is applied to estimate the composition-dependent impurity diffusion coefficients by placing suitable radiotracers at the Matano plane. The Onsager coefficients are estimated for the whole concentration range under investigation. Under the vacancy flux in the Ni–Fe diffusion couple, Cr, Co, and Mn atoms are biased towards the Ni-rich side, though the vacancy flux-driven drift of the Mn atoms is most pronounced.","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"39 1","pages":""},"PeriodicalIF":9.4,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

材料科学最新文献