Journal of Materials Chemistry A最新文献_第3页

Room-Temperature Spin-Coatable Polyoxometalate Composites for High-Contrast, Large-Area Electrochromic Capacitive Films 用于高对比度大面积电致变色电容薄膜的室温自旋涂层聚氧化金属复合材料

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06915c

Shi-Ming Wang, Kai-Hua Wang, Lu Zhou, Tianyang Lu, Eunkyoung Kim, Zhengbo Han, Jun Liang Lin, Lin Liu, Guodong Li

引用次数: 0

Ultra-Sensitive Covalent Organic Frameworks based Smoldering Sensor for Early Warning of Granary Fire 基于共价有机框架的超灵敏燃烧传感器用于粮仓火灾预警

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06517d

Yunlu Luan, Jing Zhan, Xiaojuan Ye, Xiaowei Mu

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Recent Advances and Future Prospectives of Flexible and Wearable Applications Based on Liquid Metals Demands 基于液态金属需求的柔性可穿戴应用的最新进展和未来展望

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06879c

Yifei Li, Sunwu Xu, Pengyu Zhu, Shuai Zhang, Yuntao Sun, Shuye Zhang, Peng He

{"title":"Recent Advances and Future Prospectives of Flexible and Wearable Applications Based on Liquid Metals Demands","authors":"Yifei Li, Sunwu Xu, Pengyu Zhu, Shuai Zhang, Yuntao Sun, Shuye Zhang, Peng He","doi":"10.1039/d4ta06879c","DOIUrl":"https://doi.org/10.1039/d4ta06879c","url":null,"abstract":"Liquid metals have garnered significant attention from researchers in recent years, which possess fascinating characteristics originating from their simultaneous metallic and liquid qualities. The great fluidity and conductivity make liquid metals promising for broad prospects in many fields, such as composites, aerospace, flexible electronics, biomedical devices. However, the study of liquid metals still not forming integrated research system nowadays, neglected by the wider research community. The question of “how to improve the basic performance of flexible electronic products and endow them with more unique functions” has emerged. In this review, we provide an overview of the processing methods for liquid metal based flexible devices, with a particular emphasis on various applications based on the conductivity, such as wearable sensors, controllable switches, flexible circuits, devices based on magnetic effect, joule heater, electromagnetic shielding devices. This work comprehensively introduces the application directions of liquid metals in conductivity and aims to offer innovation insights and inspiration for future research endeavors in liquid metal based flexible devices and systems.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"10 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673734","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

Performance enhancement of aqueous ionic liquids with lower critical solution temperature (LCST) behavior through ternary mixtures 通过三元混合物提高具有较低临界溶液温度（LCST）特性的水性离子液体的性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta07575g

Ahmed N Mahfouz, Andrew Z Haddad, Jordan D Kocher, Akanksha K Menon

{"title":"Performance enhancement of aqueous ionic liquids with lower critical solution temperature (LCST) behavior through ternary mixtures","authors":"Ahmed N Mahfouz, Andrew Z Haddad, Jordan D Kocher, Akanksha K Menon","doi":"10.1039/d4ta07575g","DOIUrl":"https://doi.org/10.1039/d4ta07575g","url":null,"abstract":"Thermally responsive ionic liquids (ILs) exhibit liquid-liquid phase separation when mixed with water and heated above a lower critical solution temperature (LCST), resulting in a water-rich (WR) and an IL-rich (ILR) phase. These binary IL-water mixtures can be employed in a variety of thermodynamic processes such as forward osmosis (FO) desalination, for which two solution properties are desirable: low phase separation temperature and high osmotic strength (osmolality). However, these two properties are interlinked, with ILs that exhibit higher osmotic strengths typically requiring higher phase separation temperatures. This behavior tends to arise from the hydrophilicity of the IL cations, which enhances osmotic strength while also elevating the phase separation temperature. In this work, we highlight a pathway to overcome this tradeoff by developing ternary IL mixtures (two ILs with varying cation hydrophilicity mixed with water), which lowers the phase separation temperature while maintaining and even enhancing the osmotic strength of the solution. We characterize the mixing behavior (osmolality, phase separation temperature, WR phase purity, and WR to ILR phase mass ratio) of four ILs as a function of their concentration in solution. We find that an enhancement of up to 81.6% in the osmolality with a concomitant reduction of up to 15.4% in the phase separation temperature can be achieved using this approach. The ternary mixture is also shown to improve the phase separation kinetics by nearly 95% compared to the binary mixture. Overall, this work highlights a new pathway to improve the performance of LCST ILs for water and energy applications.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"15 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673763","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

Heterointerface engineering in Cr2GaC/C hybrids through bottom-up template synthesis for enhanced electromagnetic wave absorption 通过自下而上的模板合成实现 Cr2GaC/C 杂化体的异质面工程，从而增强电磁波吸收能力

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta07294d

Feiyue Hu, Shengyu Xie, Fushuo Wu, Jian Liu, Peigen Zhang, Jianxiang Ding, Bingbing Fan, Wei Zheng, Longzhu Cai, Zhengming Sun

{"title":"Heterointerface engineering in Cr2GaC/C hybrids through bottom-up template synthesis for enhanced electromagnetic wave absorption","authors":"Feiyue Hu, Shengyu Xie, Fushuo Wu, Jian Liu, Peigen Zhang, Jianxiang Ding, Bingbing Fan, Wei Zheng, Longzhu Cai, Zhengming Sun","doi":"10.1039/d4ta07294d","DOIUrl":"https://doi.org/10.1039/d4ta07294d","url":null,"abstract":"MAX phases are emerging as efficient electromagnetic wave absorption (EMA) materials, favored for their outstanding conductivity, high-temperature stability, and corrosion resistance. However, the limitations of a singular energy loss mechanism and the need for a high filler ratio hinder their further development. Herein, a template method utilizing absorbent cotton as a carbon source was employed to synthesize 0D/1D Cr2GaC/C hybrid materials. The bottom-up preparation strategy maintains the size of the Cr2GaC MAX-phase particles at ~200 nm while ensuring their uniform distribution within the carbon fibers. The abundant heterointerfaces between Cr2GaC and carbon enhanced interfacial polarization, while the carbon fiber network improved conduction loss. Consequently, the Cr2GaC/C hybrid exhibits excellent EMA properties, achieving a minimum reflection loss value of -59.0 dB at a thickness of only 1.56 mm and an ultra-low filler content of 15 wt.%. Additionally, its maximum radar cross section reduction value is 17.78 dB m², showing excellent stealth capability. This research provides new insights into the nanoscale synthesis of MAX phases and offers promising pathways for optimizing their EMA performance.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"63 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673786","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

Construction of Cobalt-doped Ni3S2@NiFe-LDH Heterojunction with Enhanced Local Electric Field for Efficient Oxygen Evolution Reaction 构建具有增强局部电场的掺钴 Ni3S2@NiFe-LDH 异质结以实现高效氧气进化反应

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06830k

Jie Wu, Anqi Huang, Wen Cao, Xuehui Gao, Zhongwei Chen

{"title":"Construction of Cobalt-doped Ni3S2@NiFe-LDH Heterojunction with Enhanced Local Electric Field for Efficient Oxygen Evolution Reaction","authors":"Jie Wu, Anqi Huang, Wen Cao, Xuehui Gao, Zhongwei Chen","doi":"10.1039/d4ta06830k","DOIUrl":"https://doi.org/10.1039/d4ta06830k","url":null,"abstract":"Alkaline oxygen evolution reaction (OER), involving a four-electron transfer process, is characterized by high overpotential and extremely sluggish reaction kinetics, posing a significant challenge for catalyst design. Herein, a strategy is proposed to modulate the electronic structure of electrocatalyst by constructing cobalt-doped Ni3S2@NiFe-LDH (Co-Ni3S2@NiFe-LDH) hierarchical hollow heterojunction with enhanced local electric fields (ELEF). The ELEF in the heterojunction induces band bending of the components, expediting electron transfer and accelerating OER kinetics. Furthermore, the hierarchical hollow structure offers a large specific surface area that ensures full exposure of adsorption and active sites. Benefiting from these synergetic advantages, Co-Ni3S2@NiFe-LDH shows remarkable performance and stability with low overpotential of only 217 mV at 50 mA cm-2. Density functional theory (DFT) calculations further confirms that the ELEF can optimize the adsorption energy of intermediate reaction species, reduce reaction energy barriers, and modulate the d-band center of active sites, thereby improving the inherent catalyst activity.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"197 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673723","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

Structural Rule of Heteroatom-Modified Single-Atom Catalysts for CO2 Electroreduction Reaction 杂原子修饰的单原子催化剂在二氧化碳电还原反应中的结构规律

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06604a

Xinyuan Sui, Haiyang Yuan, Yu Hou

{"title":"Structural Rule of Heteroatom-Modified Single-Atom Catalysts for CO2 Electroreduction Reaction","authors":"Xinyuan Sui, Haiyang Yuan, Yu Hou","doi":"10.1039/d4ta06604a","DOIUrl":"https://doi.org/10.1039/d4ta06604a","url":null,"abstract":"Carbon dioxide electroreduction reaction (CO2RR) has emerged as a viable strategy to address pressing energy and environmental challenges. Single-atom catalysts (SACs) are of particular interest for CO2RR due to their maximized atom utilization. The incorporation of heteroatoms as ligands is a common strategy to modify the geometric and electronic structures of metal centers to enhance performance. Here, we employed density functional theory study to investigate nitrogen-coordinated SACs with various heteroatom ligands, and elucidated the structural rule of SACs on CO2RR. The results show that the planar structural SACs exhibit relatively better stabilities than the raised ones, and their stabilities exhibit a volcano-shaped trend as a function of the ligand radius, with both excessively large and small radius compromising stability. Although the raised structural SACs have the better ability to activate CO2 for the tip effect, they also hinder the CO desorption and facilitate the H+ adsorption, leading to relatively poor CO2RR activity and selectivity (vs HER). In contrast, the planar-structured SACs generally show better activity and CO2RR selectivity, where promoting the CO2 activation/hydrogenation step is necessary. This work provides fundamental insights into the structure-dependence of SACs, and offers guidance for designing SACs for CO2RR or other reactions.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"14 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673724","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

Raman spectroscopy study of K-birnessite single crystals K-birnessite 单晶体的拉曼光谱研究

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-20 DOI: 10.1039/d4ta06118g

Dong Han Ha, Gichang Noh, Hakseong Kim, Dong Hwan Kim, Jeongho Kim, Suyong Jung, Chanyong Hwang, Ha Young Lee, Yong Ju Yun, Joon Young Kwak, Kibum Kang, Sam Nyung Yi

{"title":"Raman spectroscopy study of K-birnessite single crystals","authors":"Dong Han Ha, Gichang Noh, Hakseong Kim, Dong Hwan Kim, Jeongho Kim, Suyong Jung, Chanyong Hwang, Ha Young Lee, Yong Ju Yun, Joon Young Kwak, Kibum Kang, Sam Nyung Yi","doi":"10.1039/d4ta06118g","DOIUrl":"https://doi.org/10.1039/d4ta06118g","url":null,"abstract":"Raman studies of manganese dioxide (MnO2), a crucial material for sustainable and innovative solutions in energy storage and environmental remediation, have predominantly been conducted on fine-grained aggregates, leaving the identification of Raman peaks open to debate. To address this, in this study the Raman spectra of potassium (K)-birnessite single crystals with varying crystal thickness, temperature, and polarization configuration are measured. An acoustic phonon mode of birnessite is identified, which is found to be sensitive to both crystal thickness and interlayer spacing, with its frequency increasing by approximately 35% when the c-axis lattice parameter is reduced from 0.70 to 0.65 nm by the removal of interlayer water. In contrast, the dependence of the optical phonon modes on crystal thickness and interlayer spacing is not particularly noticeable. It is demonstrated that the characteristic Raman peak of K-birnessite, observed at approximately 559 cm–1, originates from a two-dimensional hexagonal configuration of cations and water molecules within the interlayer space, rather than from the MnO6 octahedra. Additionally, the doubly degenerate vibrational mode of MnO6 octahedra, corresponding to the motion of oxygen atoms in the basal plane, splits into two, confirming that the MnO6 octahedra are distorted by the Jahn–Teller effect.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"57 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673755","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

Unveiling the performance of ultrathin bimetallic CoxNi1−x(OH)2 nanosheets for pseudocapacitors and oxygen evolution reaction 揭示用于伪电容器和氧进化反应的超薄双金属 CoxNi1-x(OH)2 纳米片的性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-19 DOI: 10.1039/d4ta06846g

Pallavi Bhaktapralhad Jagdale, Sayali Ashok Patil, Arupjyoti Pathak, Mukaddar Sk, Ranjit Thapa, Amanda Sfeir, Sebastien Royer, Akshaya Kumar Samal, Manav Saxena

{"title":"Unveiling the performance of ultrathin bimetallic CoxNi1−x(OH)2 nanosheets for pseudocapacitors and oxygen evolution reaction","authors":"Pallavi Bhaktapralhad Jagdale, Sayali Ashok Patil, Arupjyoti Pathak, Mukaddar Sk, Ranjit Thapa, Amanda Sfeir, Sebastien Royer, Akshaya Kumar Samal, Manav Saxena","doi":"10.1039/d4ta06846g","DOIUrl":"https://doi.org/10.1039/d4ta06846g","url":null,"abstract":"The rational design of highly efficient and stable electrodes is necessary for energy storage and electrocatalysis. Herein, we developed a nanometre thin bimetallic ultrathin CoxNi1−x(OH)2 nanosheet with a large lateral size by the ionic layer epitaxy (ILE) technique as an efficient bifunctional electrode material for pseudocapacitors and the oxygen evolution reaction. Its electrochemical performance was readily tuned by controlling the Co/Ni ratio. The nanosheet with a 1 : 3 Co : Ni ratio (termed Co1Ni3-NS) showed an excellent volumetric (areal) capacitance of 3783 F cm−3 (3 mF cm−2) at 0.3 mA cm−2 with 336 mW h cm−3 energy density at 256 W cm−3 power density and excellent stability, substantially outperforming other monometallic and bimetallic NSs. Moreover, as an electrocatalyst, Co1Ni3-NS delivered a lower overpotential (η10 = 318 mV) and Tafel slope (61 mV dec−1) in an alkaline environment. In situ Raman spectroscopy was employed to demonstrate the dynamic structural evolution of the catalyst during the OER process. Furthermore, DFT investigations further revealed that Co1Ni3-NS is a promising electrode with higher quantum capacitance and lower overpotential compared to other Co/Ni ratios. These findings pave a new way for controlled synthesis of highly efficient, bimetallic, and bifunctional electrode materials for pseudocapacitors and the OER.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"232 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670777","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

Exploring the Photoactive Properties of Promising MXenes for Water Splitting 探索有望用于水分离的 MXenes 的光活性特性

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-19 DOI: 10.1039/d4ta06852a

Diego Ontiveros, Francesc Viñes, Carmen Sousa

{"title":"Exploring the Photoactive Properties of Promising MXenes for Water Splitting","authors":"Diego Ontiveros, Francesc Viñes, Carmen Sousa","doi":"10.1039/d4ta06852a","DOIUrl":"https://doi.org/10.1039/d4ta06852a","url":null,"abstract":"The photoactive properties and effectiveness of a selected group of ten terminated MXenes —Sc2CT2, Y2CT2 (T = Cl, Br, S, and Se), Y2CI2 and Zr2CO2— has been deeply studied by means of density functional theory (DFT). Here it is demonstrated that the studied MXenes exhibit robust energetic and dynamical stability, having all an indirect bandgap, while most of them with values within the visible spectrum, and also exhibiting suitable band alignment for the water splitting reaction. The charge density distribution of the valence band maximum (VBM) and conduction band minimum (CBM) is found to be separated across different layers with low overlaps, below 30%. Most MXenes present high charge carrier mobilities with favourable electron-hole disparities, with Sc2CBr2 also presenting directional charge carrier transport. Additionally, these materials show strong optical absorption (~105 cm–1) in the visible spectrum, translating to promising solar-to-hydrogen (STH) efficiency theoretical limits, up to 23%. Overall, the combination of all these features positions MXenes among the optimal materials for efficient photocatalytic water splitting.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"25 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142670779","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