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Sen S, Palabathuni M, Ryan KM, Singh S. High Entropy Oxides: Mapping the Landscape from Fundamentals to Future Vistas: Focus Review. ACS ENERGY LETTERS 2024; 9:3694-3718. [PMID: 39144813 PMCID: PMC11320657 DOI: 10.1021/acsenergylett.4c01129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/13/2024] [Accepted: 06/25/2024] [Indexed: 08/16/2024]
Abstract
High-entropy materials (HEMs) are typically crystalline, phase-pure and configurationally disordered materials that contain at least five elements evenly blended into a solid-solution framework. The discovery of high-entropy alloys (HEAs) and high-entropy oxides (HEOs) disrupted traditional notions in materials science, providing avenues for the exploration of new materials, property optimization, and the pursuit of advanced applications. While there has been significant research on HEAs, the creative breakthroughs in HEOs are still being revealed. This focus review aims at developing a structured framework for expressing the concept of HEM, with special emphasis on the crystal structure and functional properties of HEOs. Insights into the recent synthetic advances, that foster prospective outcomes and their current applications in electrocatalysis, and battery, are comprehensively discussed. Further, it sheds light on the existing constraints in HEOs, highlights the adoption of theoretical and experimental tools to tackle challenges, while delineates potential directions for exploration in energy application.
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Affiliation(s)
- Suvodeep Sen
- Department of Chemical Sciences
and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Manoj Palabathuni
- Department of Chemical Sciences
and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Kevin M. Ryan
- Department of Chemical Sciences
and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Shalini Singh
- Department of Chemical Sciences
and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
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2
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Domaradzki K, Adamczyk A, Pyzalski M, Brylewski T, Nowak M, Jurczyk M. Chemical Stability of High-Entropy Spinel in a High-Pressure Pure Hydrogen Atmosphere. MATERIALS (BASEL, SWITZERLAND) 2024; 17:3309. [PMID: 38998390 PMCID: PMC11243211 DOI: 10.3390/ma17133309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2024] [Revised: 06/28/2024] [Accepted: 07/03/2024] [Indexed: 07/14/2024]
Abstract
This paper focuses on high-entropy spinels, which represent a rapidly growing group of materials with physicochemical properties that make them suitable for hydrogen energy applications. The influence of high-pressure pure hydrogen on the chemical stability of three high-entropy oxide (HEO) sinter samples with a spinel structure was investigated. Multicomponent HEO samples were obtained via mechanochemical synthesis (MS) combined with high-temperature thermal treatment. Performing the free sintering procedure on powders after MS at 1000 °C for 3 h in air enabled achieving single-phase (Cr0.2Fe0.2Mg0.2Mn0.2Ni0.2)3O4 and (Cu0.2Fe0.2Mg0.2Ni0.2Ti0.2)3O4 powders with a spinel structure, and in the case of (Cu0.2Fe0.2Mg0.2Ti0.2Zn0.2)3O4, a spinel phase in the amount of 95 wt.% was achieved. A decrease in spinel phase crystallite size and an increase in lattice strains were established in the synthesized spinel powders. The hydrogenation of the synthesized samples in a high-pressure hydrogen atmosphere was investigated using Sievert's technique. The results of XRD, SEM, and EDS investigations clearly showed that pure hydrogen at temperatures of up to 250 °C and a pressure of up to 40 bar did not significantly impact the structure and microstructure of the (Cr0.2Fe0.2Mg0.2Mn0.2Ni0.2)3O4 ceramic, which demonstrates its potential for application in hydrogen technologies.
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Affiliation(s)
- Kamil Domaradzki
- Faculty of Materials Science and Ceramics, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.D.); (A.A.); (M.P.); (T.B.)
| | - Anna Adamczyk
- Faculty of Materials Science and Ceramics, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.D.); (A.A.); (M.P.); (T.B.)
| | - Michał Pyzalski
- Faculty of Materials Science and Ceramics, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.D.); (A.A.); (M.P.); (T.B.)
| | - Tomasz Brylewski
- Faculty of Materials Science and Ceramics, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland; (K.D.); (A.A.); (M.P.); (T.B.)
| | - Marek Nowak
- Institute of Materials Science and Engineering, Faculty of Materials Engineering and Technical Physics, Poznan University of Technology, Jana Pawla II 24, 61-138 Poznań, Poland;
| | - Mieczysław Jurczyk
- Institute of Material and Biomedical Engineering, Faculty of Mechanical Engineering, University of Zielona Góra, 65-417 Zielona Góra, Poland
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Zhang L, Jia J, Yan J. Challenges and Strategies for Synthesizing High Performance Micro and Nanoscale High Entropy Oxide Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309586. [PMID: 38348913 DOI: 10.1002/smll.202309586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 01/22/2024] [Indexed: 07/13/2024]
Abstract
High-entropy oxide micro/nano materials (HEO MNMs) have shown broad application prospects and have become hot materials in recent years. This review comprehensively provides an overview of the latest developments and covers key aspects of HEO MNMs, by discussing design principles, computer-aided structural design, synthesis challenges and strategies, as well as application areas. The analysis of the synthesis process includes the role of high-throughput process in large-scale synthesis of HEOs MNMs, along with the effects of temperature elevation and undercooling on the formation of HEO MNMs. Additionally, the article summarizes the application of high-precision and in situ characterization devices in the field of HEO MNMs, offering robust support for related research. Finally, a brief introduction to the main applications of HEO MNMs is provided, emphasizing their key performances. This review offers valuable guidance for future research on HEO MNMs, outlining critical issues and challenges in the current field.
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Affiliation(s)
- Liang Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
| | - Jiru Jia
- School of Textile Garment and Design, Changshu Institute of Technology, Suzhou, Jiangsu Province, 215500, China
| | - Jianhua Yan
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, China
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Jiang S, Yu Y, He H, Wang Z, Zheng R, Sun H, Liu Y, Wang D. General Synthesis of Composition-Tunable High-Entropy Amorphous Oxides Toward High Efficiency Oxygen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310786. [PMID: 38317521 DOI: 10.1002/smll.202310786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/07/2024] [Indexed: 02/07/2024]
Abstract
High-entropy materials have attracted much attention in the electrocatalysis field due to their unique structure, high chemical activity, and compositional tunability. However, the harsh and complex synthetic methods limit the application of such materials. Herein, a universal non-equilibrium liquid-phase synthesis strategy is reported to prepare high-entropy amorphous oxide nanoparticles (HEAO-NPs), and the composition of HEAO-NPs can be precisely controlled from tri- to ten-component. The non-equilibrium synthesis environment provided by an excessively strong reducing agent overcomes the difference in the reduction potentials of various metal ions, resulting in the formation of HEAO-NPs with a nearly equimolar ratio. The oxygen evolution reaction (OER) performance of HEAO-NPs is further improved by adjusting the composition and optimizing the electronic structure. The Fe16Co32Ni32Mn10Cu10BOy exhibits a smaller overpotential (only 259 mV at 10 mA cm-2) and higher stability in OER compared with commercial RuO2. The amorphous high-entropy structure with an optimized concentration of iron makes the binding energy of CoNi shift to a higher direction, promotes the generation of high-valence active intermediates, and accelerates the OER kinetic process. The HEAO-NPs have promising application potential in the field of catalysis, biology, and energy storage, and this work provides a general synthesis method for composition-controllable high-entropy materials.
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Affiliation(s)
- Shunda Jiang
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
| | - Yihang Yu
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
| | - Huan He
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
| | - Zhiyuan Wang
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, P. R. China
- Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, 066004, P. R. China
| | - Runguo Zheng
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, P. R. China
- Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, 066004, P. R. China
| | - Hongyu Sun
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, P. R. China
| | - Yanguo Liu
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, P. R. China
- Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, 066004, P. R. China
| | - Dan Wang
- School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, P. R. China
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, P. R. China
- Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, 066004, P. R. China
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Bolar S, Ito Y, Fujita T. Future prospects of high-entropy alloys as next-generation industrial electrode materials. Chem Sci 2024; 15:8664-8722. [PMID: 38873068 PMCID: PMC11168093 DOI: 10.1039/d3sc06784j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/29/2024] [Indexed: 06/15/2024] Open
Abstract
The rapid advancement of electrochemical processes in industrial applications has increased the demand for high-performance electrode materials. High-entropy alloys (HEAs), a class of multicomponent alloys with unique properties, have emerged as potential electrode materials owing to their enhanced catalytic activity, superior stability, and tunable electronic structures. This review explores contemporary developments in HEA-based electrode materials for industrial applications and identifies their advantages and challenges as compared to conventional commercial electrode materials in industrial aspects. The importance of tuning the composition, crystal structure, different phase formations, thermodynamic and kinetic parameters, and surface morphology of HEAs and their derivatives to achieve the predicted electrochemical performance is emphasized in this review. Synthetic procedures for producing potential HEA electrode materials are outlined, and theoretical discussions provide a roadmap for recognizing the ideal electrode materials for specific electrochemical processes in an industrial setting. A comprehensive discussion and analysis of various electrochemical processes (HER, OER, ORR, CO2RR, MOR, AOR, and NRR) and electrochemical applications (batteries, supercapacitors, etc.) is included to appraise the potential ability of HEAs as an electrode material in the near future. Overall, the design and development of HEAs offer a promising pathway for advancing industrial electrode materials with improved performance, selectivity, and stability, potentially paving the way for the next generation of electrochemical technology.
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Affiliation(s)
- Saikat Bolar
- School of Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada Kami City Kochi 782-8502 Japan
| | - Yoshikazu Ito
- Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba Tsukuba 305-8573 Japan
| | - Takeshi Fujita
- School of Science and Engineering, Kochi University of Technology 185 Miyanokuchi, Tosayamada Kami City Kochi 782-8502 Japan
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Sun N, Zheng Z, Lai Z, Wang J, Du P, Ying T, Wang H, Xu J, Yu R, Hu Z, Pao CW, Huang WH, Bi K, Lei M, Huang K. Augmented Electrochemical Oxygen Evolution by d-p Orbital Electron Coupling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2404772. [PMID: 38822811 DOI: 10.1002/adma.202404772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/20/2024] [Indexed: 06/03/2024]
Abstract
While high-entropy alloys, high-entropy oxides, and high-entropy hydroxides, are advanced as a novel frontier in electrocatalytic oxygen evolution, their inherent activity deficiency poses a major challenge. To achieve the unlimited goal to tailor the structure-activity relationship in multicomponent systems, entropy-driven composition engineering presents substantial potential, by fabricating high-entropy anion-regulated transition metal compounds as sophisticated oxygen evolution reaction electrocatalysts. Herein, a versatile 2D high-entropy metal phosphorus trisulfide is developed as a promising and adjustable platform. Leveraging the multiple electron couplings and d-p orbital hybridizations induced by the cocktail effect, the exceptional oxygen evolution catalytic activity is disclosed upon van der Waals material (MnFeCoNiZn)PS3, exhibiting an impressively low overpotential of 240 mV at a current density of 10 mA cm-2, a minimal Tafel slope of 32 mV dec-1, and negligible degradation under varying current densities for over 96 h. Density functional theory calculations further offer insights into the correlation between orbital hybridization and catalytic performance within high-entropy systems, underscoring the contribution of active phosphorus centers on the substrate to performance enhancements. Moreover, by achieving electron redistribution to optimize the electron coordination environment, this work presents an effective strategy for advanced catalysts in energy-related applications.
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Affiliation(s)
- Ning Sun
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Zhichuan Zheng
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Zhuangzhuang Lai
- State Key Laboratory for Green Chemistry Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Junjie Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Peng Du
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Tianping Ying
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Haifeng Wang
- State Key Laboratory for Green Chemistry Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Jianchun Xu
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Runze Yu
- Center for High Pressure Science and Technology Advanced Research, Beijing, 100193, P. R. China
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, 01187, Dresden, Germany
| | - Chih-Wen Pao
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 300092, Taiwan, R.O.C
| | - Wei-Hsiang Huang
- National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu, 300092, Taiwan, R.O.C
| | - Ke Bi
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Ming Lei
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
| | - Kai Huang
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China
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7
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Zhou J, Zheng Y, Zhang G, Zeng X, Xu G, Cui Y. Toluene catalytic oxidation over gold catalysts supported on cerium-based high-entropy oxides. ENVIRONMENTAL TECHNOLOGY 2024; 45:3016-3028. [PMID: 37043616 DOI: 10.1080/09593330.2023.2202828] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 03/17/2023] [Indexed: 06/19/2023]
Abstract
A series of cerium-based high-entropy oxide catalysts (the ratio of CeO2 and HEO is 1:1) was prepared by a solid-state reaction method, which exploit their unique structural and performance advantages. The Ce-HEO-T samples can achieve 100% toluene conversion rate above 328°C when they were used as catalysts directly. Subsequently, the Ce-HEO-500 exhibited the lowest temperature for toluene oxidation was used as a support to deposit different amounts of Au for a further performance improvement. Among all of prepared samples, Au/Ce-HEO-500 with a moderate content of Au (0.5 wt%) exhibited the lowest temperature for complete combustion of toluene (260°C), which decreased nearly 70°C compared with Ce-HEO-500 support. Moreover, it also showed excellent stability for 60 h with 98% toluene conversion rate. Most importantly, under the condition of 5 vol.% H2O vapour, the toluene conversion rate remained unchanged and even increased slightly compared with that in dry air, exhibiting excellent water resistance. Combined with the characterizations of XRD, SEM, TEM, BET, Raman, H2-TPR and XPS, it was found that the high dispersion of active Au NPs, the special high-entropy structure and the synergistic effect between Au and Ce, Co, Cu are the key factors when improving the catalytic performance in the Au/Ce-HEO-500 catalyst.
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Affiliation(s)
- Jing Zhou
- School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning, People's Republic of China
| | - Yuhua Zheng
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Guangyi Zhang
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, People's Republic of China
| | - Xi Zeng
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, People's Republic of China
| | - Guangwen Xu
- School of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang, Liaoning, People's Republic of China
| | - Yanbin Cui
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China
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Li Y, Yao Z, Gao W, Shang W, Deng T, Wu J. Nanoscale Design for High Entropy Alloy Electrocatalysts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310006. [PMID: 38088529 DOI: 10.1002/smll.202310006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/01/2023] [Indexed: 05/25/2024]
Abstract
Due to their distinctive physical and chemical characteristics, high entropy alloys (HEAs), a class of alloys comprising multiple elements, have garnered a lot of attention. It is demonstrated recently that HEA electrocatalysts increase the activity and stability of several processes. In this paper, the most recent developments in HEA electrocatalysts research are reviewed, and the performance of HEAs in catalyzing key reactions in water electrolysis and fuel cells is summarized. In addition, the design strategies for HEA electrocatalysts optimization is introduced, which include component selection, size optimization, morphology control, structural engineering, crystal phase regulation, and theoretical prediction, which can guide component selection and structural design of HEA electrocatalysts.
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Affiliation(s)
- Yanjie Li
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhenpeng Yao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
- Future Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 201203, China
| | - Wenpei Gao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Future Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 201203, China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
- Future Material Innovation Center, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 201203, China
- Materials Genome Initiative Center, Shanghai Jiao Tong University, Shanghai, 200240, China
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Krawczyk PA, Wyrwa J, Kubiak WW. Synthesis and Catalytic Performance of High-Entropy Rare-Earth Perovskite Nanofibers: (Y 0.2La 0.2Nd 0.2Gd 0.2Sm 0.2)CoO 3 in Low-Temperature Carbon Monoxide Oxidation. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1883. [PMID: 38673239 PMCID: PMC11052524 DOI: 10.3390/ma17081883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/12/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
This study investigated the catalytic properties of low-temperature oxidation of carbon monoxide, focusing on (Y0.2La0.2Nd0.2Gd0.2Sm0.2)CoO3 synthesized via a glycothermal method using 1,4-butanediol and diethylene glycol at 250 °C. This synthesis route bypasses the energy-intensive sintering process at 1200 °C while maintaining a high-entropy single-phase structure. The synthesized material was characterized structurally and chemically by X-ray diffraction and SEM/EDX analyses. The material was shown to form nanofibers of (Y0.2La0.2Nd0.2Gd0.2Sm0.2)CoO3, thereby increasing the active surface area for catalytic reactions, and crystallize in the model Pbnm space group of distorted perovskite cell. Using a custom setup to investigate catalytic properties of (Y0.2La0.2Nd0.2Gd0.2Sm0.2)CoO3, the CO oxidation behavior of those high-entropy perovskite oxide was investigated, showing an overall conversion of 78% at 50 °C and 97% at 100 °C. These findings highlight the effective catalytic activity of nanofibers of (Y0.2La0.2Nd0.2Gd0.2Sm0.2)CoO3 under mild conditions and their versatility in various catalytic processes of robust CO neutralization. The incorporation of rare-earth elements into a high-entropy structure could impart unique catalytic properties, promoting a synergistic effect that enhances performance.
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Affiliation(s)
- Paweł A. Krawczyk
- Faculty of Materials Science and Ceramics, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Kraków, Poland;
| | | | - Władysław W. Kubiak
- Faculty of Materials Science and Ceramics, AGH University of Krakow, Al. Mickiewicza 30, 30-059 Kraków, Poland;
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10
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Sun Y, Tang T, Xiao L, Han J, Bai X, Shi M, Chen S, Sun J, Ma Y, Guan J. Nanoflower-Like High-Entropy Co-Fe-Cr-Mo-Mn Spinel for Oxygen Evolution. Chemistry 2024; 30:e202303779. [PMID: 38095235 DOI: 10.1002/chem.202303779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Indexed: 02/01/2024]
Abstract
Oxygen evolution reaction (OER) is the key anode reaction of electrolytic water. To improve the slow OER kinetics, we synthesize nanoflower-like Co-Fe-Cr-Mo-Mn high-entropy spinel (HES) nanosheets on nickel foam (NF) by one-step solvothermal method, which exhibit an overpotential (η10) of only 188 mV at 10 mA cm-2, much lower than bimetallic CoFeOx/NF (233 mV), trimetallic CoFeCrOx/NF (211 mV), and tetrametallic CoFeCrMoOx/NF (200 mV). The OER overpotential decreases with the increase of the number of metals, indicating that the formation of HES has a positive effect on the improvement of electrocatalytic performance, since the synergistic effect between different metals enhances the charge transfer rate and decreases reaction barrier. In-situ Raman spectra demonstrate that the formation of γ-NiOOH on the HES surface is a crucial active species for the OER. This work demonstrates a simple and efficient synthesis method to prepare nanoflower-like high-entropy electrocatalysts for efficient OER electrocatalysis.
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Affiliation(s)
- Yuhang Sun
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, College of Chemistry and Chemical Engineering, Qiqihar University, Heilongjiang Province, 161006, China
| | - Tianmi Tang
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Liyuan Xiao
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Jingyi Han
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Xue Bai
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Mingyuan Shi
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, College of Chemistry and Chemical Engineering, Qiqihar University, Heilongjiang Province, 161006, China
| | - Siyu Chen
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Jingru Sun
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
| | - Yuanyuan Ma
- Heilongjiang Provincial Key Laboratory of Surface Active Agent and Auxiliary, College of Chemistry and Chemical Engineering, Qiqihar University, Heilongjiang Province, 161006, China
| | - Jingqi Guan
- Institute of Physical Chemistry, College of Chemistry, Jilin University, Changchun, 130021, China
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11
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Wu H, Geng Z, Zhao X, Wang Q, Ya M, Huang T, Li J, Li L, Li G. Ultrasonic reduction: an unconventional route to exsolute Ag from perovskite La(Ag)FeO 3-δ for enhanced catalytic oxidation activity. Chem Commun (Camb) 2024; 60:2633-2636. [PMID: 38345643 DOI: 10.1039/d3cc06113b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
We explore an uncommon ultrasonic reduction method to exsolute Ag from perovskite La0.87Ag0.03FeO3-δ, forming a composite with enhanced catalytic oxidation activity. Such a mild exsolution is based on the coupling effect of ultrasonic cavitation and reducible BH4-, and holds great potential in the fields of energy and environment catalysis.
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Affiliation(s)
- Haijun Wu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Zhibin Geng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Xu Zhao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Qi Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Ming Ya
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Taotao Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Junzhi Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
| | - Guangshe Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
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12
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Meng Z, Xu Z, Tian H, Zheng W. Insights into high-entropy material synthesis dynamics criteria based on a thermodynamic framework. MATERIALS HORIZONS 2023; 10:3293-3303. [PMID: 37365968 DOI: 10.1039/d3mh00360d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
High-entropy materials (HEMs) have attracted increasing research interests owing to their structural diversity and great potential for regulation. Numerous HEMs synthesis criteria have so far been reported but most are based on thermodynamics while a guiding basis for the synthesis of HEMs is lacking, resulting in many synthesis problems. Based on the overall thermodynamic formation criterion of HEMs, this study has explored the principles of the synthesis dynamics required based on this criterion and the influence of different synthesis kinetic rates on the final products of the reaction, filling the gap suggesting that thermodynamic criteria cannot guide the specific process changes. This will effectively provide more specific guidelines for the top-level design of material synthesis. By considering various aspects of HEMs synthesis criteria, new technologies suitable for high-performance HEMs catalysts were extracted. Also, the physical and chemical characteristics of the HEMs obtained from actual synthesis can be predicted in a better way, playing an important role in the personalized customization of HEMs with specific performance. Future development directions of HEMs synthesis were prospected for possible prediction and customization of HEMs catalysts with high performance.
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Affiliation(s)
- Zeshuo Meng
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
| | - Zijin Xu
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
| | - Hongwei Tian
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
| | - Weitao Zheng
- Key Laboratory of Automobile Materials of MOE, School of Materials Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
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13
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Getachew G, Wibrianto A, Rasal AS, Batu Dirersa W, Chang JY. Metal halide perovskite nanocrystals for biomedical engineering: Recent advances, challenges, and future perspectives. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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14
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Eskikaya O, Özdemir S, Gonca S, Dizge N, Balakrishnan D, Shaik F, Senthilkumar N. A comparative study of iron nanoflower and nanocube in terms of antibacterial properties. APPLIED NANOSCIENCE 2023; 13:1-13. [PMID: 37362150 PMCID: PMC10073798 DOI: 10.1007/s13204-023-02822-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 03/05/2023] [Indexed: 06/28/2023]
Abstract
It is known that heavy metal containing nanomaterials can easily prevent the formation of microbial cultures. The emergence of new generation epidemic diseases in the last 2 years has increased the importance of both personal and environmental hygiene. For this reason, in addition to preventing the spread of diseases, studies on alternative disinfectant substances are also carried out. In this study, the antibacterial activity of nanoflower and nanocube, which are easily synthesized and nanoparticle species containing iron, were compared. The antioxidant abilities of new synthesized NF@FeO(OH) and NC@α-Fe2O3 were tested by DPPH scavenging activity assay. The highest DPPH inhibition was achieved with NC@α-Fe2O3 as 71.30% at 200 mg/L. NF@FeO(OH) and NC@α-Fe2O3 demonstrated excellent DNA cleavage ability. The antimicrobial capabilities of NF@FeO(OH) and NC@α-Fe2O3 were analyzed with micro dilution procedure. In 500 mg/L, the antimicrobial activity was 100%. In addition to these, the biofilm inhibition of NF@FeO(OH) and NC@α-Fe2O3 were investigated against S. aureus and P. aeruginosa and it was found that they showed significant antibiofilm inhibition. It is suggested that additional studies can be continued to be developed and used as an antibacterial according to the results of the nanoparticles after various toxicological test systems. Supplementary Information The online version contains supplementary material available at 10.1007/s13204-023-02822-5.
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Affiliation(s)
- Ozan Eskikaya
- Department of Environmental Engineering, Mersin University, 33343 Mersin, Turkey
| | - Sadin Özdemir
- Technical Science Vocational School, Mersin University, Yenisehir, 33343 Mersin, Turkey
| | - Serpil Gonca
- Faculty of Pharmacy, University of Mersin, Turkey, Yenisehir, 33343 Mersin, Turkey
| | - Nadir Dizge
- Department of Environmental Engineering, Mersin University, 33343 Mersin, Turkey
| | - Deepanraj Balakrishnan
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952 Saudi Arabia
| | - Feroz Shaik
- College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar, 31952 Saudi Arabia
| | - Natarajan Senthilkumar
- Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105 India
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15
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Wang Y, Liu J, Song Y, Yu J, Tian Y, Robson MJ, Wang J, Zhang Z, Lin X, Zhou G, Wang Z, Shen L, Zhao H, Grasso S, Ciucci F. High-Entropy Perovskites for Energy Conversion and Storage: Design, Synthesis, and Potential Applications. SMALL METHODS 2023; 7:e2201138. [PMID: 36843320 DOI: 10.1002/smtd.202201138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/17/2022] [Indexed: 06/18/2023]
Abstract
Perovskites have shown tremendous promise as functional materials for several energy conversion and storage technologies, including rechargeable batteries, (electro)catalysts, fuel cells, and solar cells. Due to their excellent operational stability and performance, high-entropy perovskites (HEPs) have emerged as a new type of perovskite framework. Herein, this work reviews the recent progress in the development of HEPs, including synthesis methods and applications. Effective strategies for the design of HEPs through atomistic computations are also surveyed. Finally, an outlook of this field provides guidance for the development of new and improved HEPs.
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Affiliation(s)
- Yuhao Wang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Jiapeng Liu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Yufei Song
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Jing Yu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Yunfeng Tian
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Matthew James Robson
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Jian Wang
- School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong SAR, P. R. China
| | - Zhiqi Zhang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Xidong Lin
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
- Julong College, Shenzhen Technology University, Shenzhen, 518118, P. R. China
| | - Guodong Zhou
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Zheng Wang
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Longyun Shen
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
- Division of Emerging Interdisciplinary Areas, Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
| | - Hailei Zhao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China
- Beijing Municipal Key Lab for Advanced Energy Materials and Technologies, Beijing, 100083, P. R. China
| | - Salvatore Grasso
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Francesco Ciucci
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Shenzhen, 518048, P. R. China
- Energy Institute, The Hong Kong University of Science and Technology, Hong Kong SAR, P. R. China
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16
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Ma Y, Chen Y, Sun M, Zhang Y. Physicochemical Properties of High-Entropy Oxides. CHEM REC 2023; 23:e202200195. [PMID: 36328765 DOI: 10.1002/tcr.202200195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/28/2022] [Indexed: 11/06/2022]
Abstract
The development of industry has triggered an increasingly severe demand for new functional materials. In recent years, researches on high-entropy oxides (HEOs) are more comprehensive and in-depth, and their fascinating properties are gradually known to the public. The unique elemental synergistic effect and lattice distortion endow the high-entropy family with various untapped potential, and wide application fields and outstanding performance of HEOs make them candidates for future materials. In this review, the concept, structure, and synthesis of HEOs are firstly highlighted. Secondly, a variety of excellent properties and applications in the fields of mechanics, electrics, thermotics, optics and magnetics are summarized. This work provides a comprehensive overview about HEOs, facilitating the development of modern functionalities of the high-entropy family.
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Affiliation(s)
- Yue Ma
- Institute of Physics and Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji, 721016, Shaanxi, P. R. China
| | - Yichuan Chen
- School of Mathematics and Physics, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R China
| | - Mengtao Sun
- School of Mathematics and Physics, Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R China
| | - Yun Zhang
- Institute of Physics and Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji, 721016, Shaanxi, P. R. China
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17
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Cai ZP, Ma C, Kong XY, Wu XY, Wang KX, Chen JS. High-Performance PEO-Based All-Solid-State Battery Achieved by Li-Conducting High Entropy Oxides. ACS APPLIED MATERIALS & INTERFACES 2022; 14:57047-57054. [PMID: 36516351 DOI: 10.1021/acsami.2c18552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
A rock-salt-structured Li-conducting high entropy oxide was prepared and utilized as an active filler in a polyethylene oxide (PEO)-based solid-state composite electrolyte. X-ray diffraction and high-resolution transmission electron microscopy were adopted to analyze the crystal structure of the high entropy oxide containing 20% of Li ions (HL20). The HL20 was crystallized in the Fm3̅m space group with Li+ ions located at the center of the MO6 octahedra. The ionic conductivity of the composite membrane at 30 °C reaches 3.44 × 10-5 S cm-1. The inflection point of activation energy of the membrane with HL20 decreases by 5 °C compared with that of the pure PEO membrane. In the galvanostatic plating/stripping test, the Li||Li symmetric batteries could be cycled at a current density of 200 μA cm-2 for over 1200 h with an overpotential of 140 mV. The Li||LiFePO4 full battery could be charged/discharged at 0.5 C for 100 circles with a high capacity retention rate of 91%. Excellent rate performance is also achieved at lower temperatures and higher rates, showing the superiority of HL20 as an active filler. This work sheds light on the development of high entropy oxide as a new type of fast ionic conductor, promoting the practical application of all-solid-state batteries at a lower temperature.
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Affiliation(s)
- Zhi-Peng Cai
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Chao Ma
- College of Smart Energy, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Xiang-Yang Kong
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Xue-Yan Wu
- School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Kai-Xue Wang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai200240, P. R. China
| | - Jie-Sheng Chen
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai200240, P. R. China
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18
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Liu X, Wang X, Sun H, Zhang Z, Song P, Liu Y. Highly Stable Bimetal Ni–Co on Alumina-Covered Spinel Oxide Derived from High Entropy Oxide for CO 2 Methanation. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Xuemei Liu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
| | - Xitao Wang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
| | - Huayu Sun
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
| | - Ziyang Zhang
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
| | - Pengfei Song
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
| | - Yuan Liu
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin300350, China
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19
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Yu Y, Liu S, Wang H, Zhang S, Wang N, Jiang W, Liu C, Ding W, Zhang Z, Dong C. Design, synthesis and photocatalytic performance of A32Ti8Sn8Nb4Ta4Me8O96 (A=Ba, Sr; Me=Fe, Ga) perovskite structure high entropy oxides. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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High-Entropy Spinel Oxides Produced via Sol-Gel and Electrospinning and Their Evaluation as Anodes in Li-Ion Batteries. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12125965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In the last few years, high-entropy oxides (HEOs), a new class of single-phase solid solution materials, have attracted growing interest in both academic research and industry for their great potential in a broad range of applications. This work investigates the possibility of producing pure single-phase HEOs with spinel structure (HESOs) under milder conditions (shorter heat treatments at lower temperatures) than standard solid-state techniques, thus reducing the environmental impact. For this purpose, a large set of HESOs was prepared via sol-gel and electrospinning (by using two different polymers). Ten different equimolar combinations of five metals were considered, and the influence of the synthesis method and conditions on the microstructure, morphology and crystalline phase purity of the produced HESOs was investigated by a combination of characterization techniques. On the other hand, the presence of specific metals, such as copper, lead to the formation of minority secondary phase(s). Finally, two representative pure single-phase HESOs were preliminarily evaluated as active anode materials in lithium-ion batteries and possible strategies to enhance their rate capability and cyclability were proposed and successfully implemented. The approaches introduced here can be extensively applied for the optimization of HEO properties targeting different applications.
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21
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Shi Y, Xu Q, Tian Z, Liu G, Ma C, Zheng W. Ionic liquid-hydroxide-mediated low-temperature synthesis of high-entropy perovskite oxide nanoparticles. NANOSCALE 2022; 14:7817-7827. [PMID: 35262130 DOI: 10.1039/d1nr08316c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
High-entropy perovskite oxides (HEPOs) are attracting significant attention due to their unique structures, unprecedented properties and great application potential in many fields, while available synthetic methods have many shortcomings; so it is still a challenge to develop a simple, low-cost and environment-friendly synthetic strategy for HEPOs. Herein, a novel synthetic strategy is reported for HEPOs using an ionic liquid (IL)-hydroxide-mediated technique at a low temperature and normal atmospheric pressure. The synthesized HEPOs, including Ba(FeNbTiZrTa)O3, Ba(MnNbTiZrTa)O3, Ba(FeSnTiZrTa)O3 and Ba(FeVTiZrTa)O3, exhibit a cubic structure and a dispersed nanoparticle morphology (particle size of 20-60 nm). The formation process of HEPOs in an IL-KOH system can be described as follows: first, B-site metal source compounds are dissolved in IL-KOH medium to form hydroxyl complexes; second, the complexes further dehydrate, condensate and react with Ba2+ ions to form the crystal nuclei of HEPOs under the synergistic effect of reaction temperature and basicity; third, the growth of HEPO nuclei is completed by the Ostwald ripening process. In these processes, KOH not only plays a role as a solvent, but also provides sufficient OH- concentration for the formation and condensation of B-site metal hydroxyl complexes, while the IL also makes significant contributions: first, a lower reaction temperature and lower dosage of KOH are achieved by the use of the IL; second, the IL with good dissolving ability and low surface tensions can promote the nucleation rate of HEPOs and improve the Ostwald ripening process; third, the compact adsorption of the IL on the surface of products ensures a small particle size and high dispersion of HEPO nanoparticles to a certain extent. In brief, the technique provides an innovative, low-cost, simple and nontoxic strategy for the synthesis of HEPOs, which can be extended to other high-entropy materials.
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Affiliation(s)
- Yingying Shi
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
| | - Qiuchen Xu
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
| | - Zhangmin Tian
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
| | - Guiying Liu
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
| | - Chenxu Ma
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
| | - Wenjun Zheng
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE), TKL of Metal and Molecule-based Material Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.
- Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin, 300071, P. R. China
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22
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Okejiri F, Fan J, Huang Z, Siniard KM, Chi M, Polo-Garzon F, Yang Z, Dai S. Ultrasound-mediated synthesis of nanoporous fluorite-structured high-entropy oxides toward noble metal stabilization. iScience 2022; 25:104214. [PMID: 35494219 PMCID: PMC9048099 DOI: 10.1016/j.isci.2022.104214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/17/2022] [Accepted: 04/01/2022] [Indexed: 12/02/2022] Open
Abstract
High-entropy oxides (HEOs) are an emerging class of advanced ceramic materials capable of stabilizing ultrasmall nanoparticle catalysts. However, their fabrication still relies on high-temperature thermal treatment methodologies affording nonporous architectures. Herein, we report a facile synthesis of single-phase, fluorite-structured HEO nanocrystals via an ultrasound-mediated co-precipitation strategy under ambient conditions. Within 15 min of ultrasound exposure, high-quality fluorite-structured HEO (CeHfZrSnErOx) was generated as ultrasmall-sized particles with high surface area and high oxygen vacancy concentration. Taking advantage of these unique structural features, palladium was introduced and stabilized in the form of highly dispersed Pd nanoclusters within the CeHfZrSnErOx architecture. Neither phase segregation of the CeHfZrSnErOx support nor Pd sintering was observed under thermal treatment up to 900°C. The as-afforded Pd/CeHfZrSnErOx catalyst exhibits good catalytic performance toward CO oxidation, outperforming Pd/CeO2 of the same Pd loading, which highlights the inherent advantage of CeHfZrSnErOx as carrier support over traditional oxides. Single-phase, fluorite-structured high-entropy oxides nanocrystals was synthesized An ultrasound-mediated co-precipitation strategy under ambient conditions was used CeHfZrSnErOx exhibited high surface area and high oxygen vacancy concentration Pd nanoclusters within the CeHfZrSnErOx architecture can be stabilized
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23
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Dong Q, Hong M, Gao J, Li T, Cui M, Li S, Qiao H, Brozena AH, Yao Y, Wang X, Chen G, Luo J, Hu L. Rapid Synthesis of High-Entropy Oxide Microparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104761. [PMID: 35049145 DOI: 10.1002/smll.202104761] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 12/15/2021] [Indexed: 06/14/2023]
Abstract
High-entropy nanoparticles have received notable attention due to their tunable properties and broad material space. However, these nanoparticles are not suitable for certain applications (e.g., battery electrodes), where their microparticle (submicron to micron) counterparts are more preferred. Conventional methods used for synthesizing high-entropy nanoparticles often involve various ultrafast shock processes. To increase the size thereby achieving high-entropy microparticles, longer reaction time (e.g., heating duration) is usually used, which may also lead to undesired particle overgrowth or even densified microstructures. In this work, an approach based on Joule heating for synthesizing high-entropy oxide (HEO) microparticles with uniform elemental distribution is reported. In particular, two key synthesis conditions are identified to achieve high-quality HEO microparticles: 1) the precursors need to be loosely packed to avoid densification; 2) the heating time needs to be accurately controlled to tens of seconds instead of using milliseconds (thermal shock) that leads to nanoparticles or longer heating duration that forms bulk structures. The utility of the synthesized HEO microparticles for a range of applications, including high-performance Li-ion battery anode and water oxidation catalyst. This study opens up a new door toward synthesizing high-entropy microparticles with high quality and broad material space.
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Affiliation(s)
- Qi Dong
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Min Hong
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Jinlong Gao
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Tangyuan Li
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Mingjin Cui
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Shuke Li
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Haiyu Qiao
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Alexandra H Brozena
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Yonggang Yao
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Xizheng Wang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Gang Chen
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Jian Luo
- Department of NanoEngineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA
- Center for Materials Innovation, University of Maryland, College Park, MD, 20742, USA
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Abdel Maksoud MIA, Fahim RA, Bedir AG, Osman AI, Abouelela MM, El-Sayyad GS, Elkodous MA, Mahmoud AS, Rabee MM, Al-Muhtaseb AH, Rooney DW. Engineered magnetic oxides nanoparticles as efficient sorbents for wastewater remediation: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2022; 20:519-562. [DOI: 10.1007/s10311-021-01351-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 10/21/2021] [Indexed: 09/02/2023]
Abstract
AbstractThe rapid urbanization and industrialization is causing worldwide water pollution, calling for advanced cleaning methods. For instance, pollutant adsorption on magnetic oxides is efficient and very practical due to the easy separation from solutions by an magnetic field. Here we review the synthesis and performance of magnetic oxides such as iron oxides, spinel ferrites, and perovskite oxides for water remediation. We present structural, optical, and magnetic properties. Magnetic oxides are also promising photocatalysts for the degradation of organic pollutants. Antimicrobial activities and adsorption of heavy metals and radionucleides are also discussed.
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25
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Zhao J, Bao J, Yang S, Niu Q, Xie R, Zhang Q, Chen M, Zhang P, Dai S. Exsolution–Dissolution of Supported Metals on High-Entropy Co 3MnNiCuZnO x: Toward Sintering-Resistant Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03228] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jiahua Zhao
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiafeng Bao
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shize Yang
- Eyring Materials Center, Arizona State University, Tempe, Arizona 85287, United States
| | - Qiang Niu
- Inner Mongolia Erdos Power and Metallurgy Group Co., Ltd., Ordos 017010, Inner Mongolia, China
| | - Rongyong Xie
- Inner Mongolia Erdos Power and Metallurgy Group Co., Ltd., Ordos 017010, Inner Mongolia, China
| | - Qiuyue Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mingshu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Pengfei Zhang
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Sheng Dai
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37921, United States
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge 37830, Tennessee, United States
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26
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Stepwise Evolution of Photocatalytic Spinel-Structured (Co,Cr,Fe,Mn,Ni)3O4 High Entropy Oxides from First-Principles Calculations to Machine Learning. CRYSTALS 2021. [DOI: 10.3390/cryst11091035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
High entropy oxides (HEOx) are novel materials, which increase the potential application in the fields of energy and catalysis. However, a series of HEOx is too novel to evaluate the synthesis properties, including formation and fundamental properties. Combining first-principles calculations with machine learning (ML) techniques, we predict the lattice constants and formation energies of spinel-structured photocatalytic HEOx, (Co,Cr,Fe,Mn,Ni)3O4, for stoichiometric and non-stoichiometric structures. The effects of site occupation by different metal cations in the spinel structure are obtained through first-principles calculations and ML predictions. Our predicted results show that the lattice constants of these spinel-structured oxides are composition-dependent and that the formation energies of those oxides containing Cr atoms are low. The computing time and computing energy can be greatly economized through the tandem approach of first-principles calculations and ML.
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27
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Yang C, Guo F, Zhang Y, Zhong X, Feng J, Wang N, Wang J. Luminescence Change from Orange to Blue for Zero-Dimensional Cs 2 InCl 5 (H 2 O) Metal Halides in Water and a New Post-doping Method. Chem Asian J 2021; 16:1619-1625. [PMID: 33932257 DOI: 10.1002/asia.202100293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/28/2021] [Indexed: 12/26/2022]
Abstract
Zero-dimensional metal halides have attracted much attention due to their attractive photoelectric properties. Here, we propose a new strategy of synthesizing metal halides crystals by recrystallization in water. The as-synthesized Cs2 InCl5 (H2 O)-orange crystals are dissolved and recrystallized in water (Cs2 InCl5 (H2 O)-blue), with its photoluminescence (PL) changing from orange to blue, both of which are derived from self-trapping excitons (STEs). The time-resolved photoluminescence (TRPL) spectrum of Cs2 InCl5 (H2 O)-blue shows that it has an ultralong lifetime up to milliseconds (τ=52.98 ms), which is expected to be applied in biological sensors. The photoluminescence quantum yield (PLQY) increases from 2.25% to 11.61% in the self-assembly process. By using a post-doping method, the PL of crystals turns into red when we introduce Mn2+ as dopant while there is no obvious change upon using a traditional solvent-thermal method. Recrystallization in water and post-doping provide a new perspective for the synthesis and doping of metal halides.
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Affiliation(s)
- Chuang Yang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Fengwan Guo
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China.,Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Hubei University, Wuhan, 430062, P. R. China
| | - Yu Zhang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Xinxin Zhong
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Jing Feng
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Nan Wang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Juan Wang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China.,Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei University, Wuhan, 430062, P. R. China
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28
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Abstract
The concept of “high entropy” was first proposed while exploring the unknown center of the metal alloy phase diagram, and then expanded to oxides. The colossal dielectric constant found on the bulk high-entropy oxides (HEOs) reveals the potential application of the high-entropy oxides in the dielectric aspects. Despite the fact that known HEO thin films have not been reported in the field of dielectric properties so far, with the high-entropy effects and theoretical guidance of high entropy, it is predictable that they will be discovered. Currently, researchers are verifying that appropriately increasing the oxygen content in the oxide, raising the temperature and raising the pressure during preparation have an obvious influence on thin films’ resistivity, which may be the guidance on obtaining an HEO film large dielectric constant. Finally, it could composite a metal–insulator–metal capacitor, and contribute to sensors and energy storage devices’ development; alternatively, it could be put into application in emerging thin-film transistor technologies, such as those based on amorphous metal oxide semiconductors, semiconducting carbon nanotubes, and organic semiconductors.
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29
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Sun Y, Dai S. High-entropy materials for catalysis: A new frontier. SCIENCE ADVANCES 2021; 7:eabg1600. [PMID: 33980494 PMCID: PMC8115918 DOI: 10.1126/sciadv.abg1600] [Citation(s) in RCA: 145] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 03/25/2021] [Indexed: 05/19/2023]
Abstract
Entropy plays a pivotal role in catalysis, and extensive research efforts have been directed to understanding the enthalpy-entropy relationship that defines the reaction pathways of molecular species. On the other side, surface of the catalysts, entropic effects have been rarely investigated because of the difficulty in deciphering the increased complexities in multicomponent systems. Recent advances in high-entropy materials (HEMs) have triggered broad interests in exploring entropy-stabilized systems for catalysis, where the enhanced configurational entropy affords a virtually unlimited scope for tailoring the structures and properties of HEMs. In this review, we summarize recent progress in the discovery and design of HEMs for catalysis. The correlation between compositional and structural engineering and optimization of the catalytic behaviors is highlighted for high-entropy alloys, oxides, and beyond. Tuning composition and configuration of HEMs introduces untapped opportunities for accessing better catalysts and resolving issues that are considered challenging in conventional, simple systems.
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Affiliation(s)
- Yifan Sun
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
- Department of Chemistry, The University of Tennessee, Knoxville, TN 37996, USA
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30
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Sharma AK, Yang JM, Pandey S, Wu HF. Introducing Tb 4+ in (Ce 0.09/Eu 0.96)Tb 0.92Mo 1.1O 6.93 Metal Oxide at Room Temperature and Its Use in Amyloid Defibrillation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:18184-18193. [PMID: 33826292 DOI: 10.1021/acsami.0c17806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Tunable optical properties in nanomaterials enable a variety of applications in multidisciplinary areas. These properties are directly related to several different factors such as solvent conditions, synthesis methods, and most significantly, the oxidation states of metals participating in the absorption or emission properties. Lanthanide metals containing ABO3 perovskites are among such nanomaterials that can be tuned to a great extent by only modifying the charged states on the metals in the composition. We report a green synthesis method through sonication to synthesize ABO3 perovskites to incorporate Tb4+ into the perovskite composition at room temperature. The optical properties of the nanomaterial show emission in the entire ultraviolet-visible-near-infrared spectral regions through charge transfer between europium and terbium. The combination of cerium (C), molybdenum (M), europium (E), and terbium (T) results in a sheet-like CMET perovskite obeying hexagonal geometry. The nanomaterial is highly stable in an aqueous medium, showing finely suspended Tyndall effect due to particle size <300 nm. Owing to their wide range of emission behavior, surface charge, and aqueous stability, CMET perovskites were used to study the defibrillation of hen egg-white lysozyme (HEWL) as an amyloid model protein. The intrinsic property of the nanomaterial assists in the interaction of the fibrils with the perovskite and the emission range becomes the reporter of the defibrillation. Infrared spectroscopy shows the change in the material properties during the defibrillation. A preliminary test on the varying concentration of HEWL incubated with CMET perovskites shows linear behavior with R2 = 0.9841. The tunable emission characteristic and aqueous stability of the perovskite material make it suitable for future biological applications.
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Affiliation(s)
- Amit Kumar Sharma
- Department of Chemistry, National Sun Yat-Sen University, No. 70, Lien-Hai Road, Kaohsiung 804, Taiwan
| | - Ji-Ming Yang
- Department of Chemistry, National Sun Yat-Sen University, No. 70, Lien-Hai Road, Kaohsiung 804, Taiwan
| | - Sunil Pandey
- Department of Chemistry, National Sun Yat-Sen University, No. 70, Lien-Hai Road, Kaohsiung 804, Taiwan
| | - Hui-Fen Wu
- Department of Chemistry, National Sun Yat-Sen University, No. 70, Lien-Hai Road, Kaohsiung 804, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Institute of Medical Science and Technology & International PhD Program for Science, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
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31
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Abstract
High-entropy materials (HEMs), including high-entropy alloys (HEAs), high-entropy oxides (HEOs), and other high-entropy compounds, have gained significant interests over the past years. These materials have unique structures with the coexistence of antisite disordering and crystal periodicity, which were originally investigated as structural materials. Recently, they have emerged for energy-related applications, such as catalysis, energy storage, etc. In this work, we review the research progress of energy-related applications of HEMs. After an introduction on the background, theory, and syntheses of HEMs, we survey their applications including electrocatalysis, batteries, and others, aiming to retrieve the correlations between their structures and performances. In the end, we discussed the challenges and future directions for developing HEMs.
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Affiliation(s)
- Maosen Fu
- Shaanxi Materials Analysis and Research Center, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Xiao Ma
- Shaanxi Materials Analysis and Research Center, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China
| | - Kangning Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiao Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Su
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
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32
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Riley C, De La Riva A, Park JE, Percival SJ, Benavidez A, Coker EN, Aidun RE, Paisley EA, Datye A, Chou SS. A High Entropy Oxide Designed to Catalyze CO Oxidation Without Precious Metals. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8120-8128. [PMID: 33565850 DOI: 10.1021/acsami.0c17446] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The chemical complexity of single-phase multicationic oxides, commonly termed high entropy oxides (HEOs), enables the integration of conventionally incompatible metal cations into a single-crystalline phase. However, few studies have effectively leveraged the multicationic nature of HEOs for optimization of disparate physical and chemical properties. Here, we apply the HEO concept to design robust oxidation catalysts in which multicationic oxide composition is tailored to simultaneously achieve catalytic activity, oxygen storage capacity, and thermal stability. Unlike conventional catalysts, HEOs maintain single-phase structure, even at high temperature, and do not rely on the addition of expensive platinum group metals (PGM) to be active. The HEOs are synthesized through a facile, relatively low temperature (500 °C) sol-gel method, which avoids excessive sintering and catalyst deactivation. Nanostructured high entropy oxides with surface areas as high as 138 m2/g are produced, marking a significant structural improvement over previously reported HEOs. Each HEO contained Ce in varying concentrations, as well as four other metals among Al, Fe, La, Mn, Nd, Pr, Sm, Y, and Zr. All samples adopted a fluorite structure. First row transition metal cations were most effective at improving CO oxidation activity, but their incorporation reduced thermal stability. Rare earth cations were necessary to prevent thermal deactivation while maintaining activity. In sum, our work demonstrates the utility of entropy in complex oxide design and a low-energy synthetic route to produce nanostructured HEOs with cations selected for a cooperative effect toward robust performance in chemically and physically demanding applications.
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Affiliation(s)
- Christopher Riley
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Andrew De La Riva
- Department of Chemical and Biological Engineering and Center for Microengineered Materials, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - James Eujin Park
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Stephen J Percival
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Angelica Benavidez
- Department of Chemical and Biological Engineering and Center for Microengineered Materials, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Eric N Coker
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Ruby E Aidun
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | | | - Abhaya Datye
- Department of Chemical and Biological Engineering and Center for Microengineered Materials, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Stanley S Chou
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
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33
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Roy M, Dedhia U, Alam A, Aslam M. Spontaneous Ion Migration via Mechanochemical Ultrasonication in Mixed Halide Perovskite Phase Formation: Experimental and Theoretical Insights. J Phys Chem Lett 2021; 12:1189-1194. [PMID: 33480705 DOI: 10.1021/acs.jpclett.0c03426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We present a simple yet powerful synthesis process to prepare compound-phase perovskite nanoparticles (MAPbX3-nYn; MA = CH3NH3+ and X/Y = I, Br, or Cl). This is achieved by mixing two pure-phase perovskites (MAPbX3 and MAPbY3) by using ultrasonic vibration as a mechanochemical excitation. Unlike conventional methods, this procedure does not require any effort in designing a reaction or choosing any particular precursor. X-ray diffraction and TEM studies confirm compound-phase formation in all possible stoichiometries. The origin behind ultrasonic mixing lies in the generation of mechanical stress and high temperature arising from acoustic cavitation during reaction. Long-term experimental stability of the compound-phase is comprehended theoretically by simulating the temperature-dependent Gibbs free energy. Negative mixing entropy plays a crucial role during the synthesis which leads to better stabilization of the compound-phase perovskite over the pure-phase. The ease of synthesis and remarkable phase stability make this process effective and less cumbersome for perovskite nanoparticle synthesis.
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Affiliation(s)
- Mrinmoy Roy
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Urvi Dedhia
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Aftab Alam
- Materials Modelling Group, Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - M Aslam
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
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34
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Dai S. Across the Board: Sheng Dai on Catalyst Design by Entropic Factors. CHEMSUSCHEM 2020; 13:1915-1917. [PMID: 32105398 DOI: 10.1002/cssc.202000448] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Indexed: 06/10/2023]
Abstract
In this series of articles, the board members of ChemSusChem discuss recent research articles that they consider of exceptional quality and importance for sustainability. This entry features Dr. S. Dai, who discusses high-entropy materials (HEMs) as new materials in catalysis. In this viewpoint, two types of HEMs (alloy and non-alloy HEMs), their synthesis, and their application in various catalytic reactions are presented.
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Affiliation(s)
- Sheng Dai
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
- Department of Chemistry, University of Tennessee, Knoxville, TN 37966-1600, USA
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