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He LB, Shangguan L, Ran YT, Zhu C, Lu ZY, Zhu JH, Yu DJ, Kan CX, Sun LT. Revealing the alloying and dealloying behaviours in AuAg nanorods by thermal stimulus. NANOSCALE ADVANCES 2023; 5:685-692. [PMID: 36756526 PMCID: PMC9890656 DOI: 10.1039/d2na00746k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 12/07/2022] [Indexed: 06/18/2023]
Abstract
Binary metallic nanocrystals are attractive as they offer an extra degree of freedom for structure and phase modulation to generate synergistic effects and extraordinary properties. However, whether the binary structures and phases at the nanoscale still follow the rules established on the bulk counterparts remains unclear. In this work, AuAg nanorods were used as a sample to probe into this issue. An in situ heating method by combining aberration-corrected transmission electron microscopes with a chip-based heating holder was employed to perform the heating experiments. It was found that the AuAg nanorods, which initially possessed heterostructures, can be designed and engineered to be gradient phase alloys with thermal pulses over 350 °C. Atomic diffusion inside the rod structures did not alter the shape of the rods but provided a route to fine-tune their properties. At higher temperatures, the discrepant sublimation behaviours between Au and Ag lead to dealloying of the nanorods. Durative sublimation of the Ag element can continuously tailor the lengths of the nanorods while concentrating the Au composition simultaneously. Especially, nearly pure Au nanocrystals can be obtained with the depletion of Ag by sublimation. These findings give insights into the nanoscale structure and phase behaviours in binary alloys and provide an alternative way to fine-tune their structure, phase, and properties.
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Affiliation(s)
- Long-Bing He
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University Suzhou 215123 P. R. China
| | - Lei Shangguan
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Ya-Ting Ran
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Chao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Zi-Yu Lu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Jiong-Hao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Dao-Jiang Yu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
| | - Cai-Xia Kan
- College of Physics, Nanjing University of Aeronautics and Astronautics No. 29 Jiangjun Road Nanjing 211106 P. R. China
| | - Li-Tao Sun
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, Southeast University Nanjing 210096 P. R. China
- Centre for Advanced Materials and Manufacture, Joint Research Institute of Southeast University and Monash University Suzhou 215123 P. R. China
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2
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Polak M, Rubinovich L. The Thermal Stability of Asymmetric Separated Configurations inside Alloy Nanoparticles: Atomic-Scale Modeling of Pd-Ir Nanophase Diagrams. ACS NANO 2022; 16:20186-20196. [PMID: 36493340 DOI: 10.1021/acsnano.2c05419] [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
Compared to alloy bulk phase diagrams, the experimental determination of phase diagrams for alloy nanoparticles (NPs), which are useful in various nanotechnological applications, involves significant technical difficulties, making theoretical modeling a feasible alternative. Yet, being quite challenging, modeling of separation nanophase diagrams is scarce in the literature. The task of predicting comprehensive nanophase diagrams for Pd-Ir face-centered cubic-based three cuboctahedra is facilitated in this study by combining the computationally efficient statistical-mechanical Free-energy Concentration Expansion Method, which includes short-range order (SRO) with coordination-dependent bond-energy variations as part of the input and with rotationally symmetric site grouping for extra efficiency. This nanosystem has been chosen mainly because of the very small atomic mismatch that simplifies the modeling, e.g., in the assessment of vibrational entropy contributions based in this work on fitting to the Pd-Ir experimental bulk critical temperature. This entropic effect, together with SRO, leads to significant destabilization of low-T Quasi-Janus (QJ) asymmetric configurations of the NP core, which transform to symmetric partially mixed nanophases. First-order and second-order intracore transitions are predicted for dilute and intermediate-range compositions, respectively. Caloric curves computed for the former case yield the NP-size dependent transition latent heat, and in the latter case critical temperatures exhibit a specific scaling behavior. The computed separation diagrams and intracore solubility diagrams reflect enhanced elemental mixing in smaller QJ nanophases. In addition to these diagrams, the revealed near-surface compositional variations are likely to be pertinent to the utilization of Pd-Ir NPs, e.g., in catalysis.
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Affiliation(s)
- Micha Polak
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva84105, Israel
| | - Leonid Rubinovich
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva84105, Israel
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3
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Oshchepkov AG, Simonov PA, Kuznetsov AN, Shermukhamedov SA, Nazmutdinov RR, Kvon RI, Zaikovskii VI, Kardash TY, Fedorova EA, Cherstiouk OV, Bonnefont A, Savinova ER. Bimetallic NiM/C (M = Cu and Mo) Catalysts for the Hydrogen Oxidation Reaction: Deciphering the Role of Unintentional Surface Oxides in the Activity Enhancement. ACS Catal 2022. [DOI: 10.1021/acscatal.2c03720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Alexandr G. Oshchepkov
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Pavel A. Simonov
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Aleksey N. Kuznetsov
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Shokir A. Shermukhamedov
- Kazan National Research Technological University, Kazan 420015, Russia
- Institute of Ion Physics and Applied Physics, University of Innsbruck, Innsbruck 6020, Austria
| | | | - Ren I. Kvon
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
| | - Vladimir I. Zaikovskii
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Tatyana Yu. Kardash
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | | | - Olga V. Cherstiouk
- Boreskov Institute of Catalysis, Lavrentiev Avenue 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Antoine Bonnefont
- Institut de Chimie de Strasbourg, UMR 7177 CNRS-University of Strasbourg, 4 rue Blaise Pascal, Strasbourg 67070, France
| | - Elena R. Savinova
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé, UMR 7515 CNRS-University of Strasbourg, 25 rue Becquerel, Strasbourg Cedex 67087, France
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4
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Toulkeridou E, Kioseoglou J, Grammatikopoulos P. On the melting point depression, coalescence, and chemical ordering of bimetallic nanoparticles: the miscible Ni-Pt system. NANOSCALE ADVANCES 2022; 4:4819-4828. [PMID: 36381515 PMCID: PMC9642358 DOI: 10.1039/d2na00418f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Among the properties that distinguish nanoparticles (NPs) from their bulk counterparts is their lower melting points. It is also common knowledge that relatively low melting points enhance the coalescence of (usually) nascent nanoclusters toward larger NPs. Finally, it is well established that the chemical ordering of bi- (or multi-) metallic NPs can have a profound effect on their physical and chemical properties, dictating their potential applications. With these three considerations in mind, we investigated the coalescence mechanisms for Ni and Pt NPs of various configurations using classical molecular dynamics (MD) computer simulations. Benchmarking the coalescence process, we identified a steeper melting point depression for Pt than for Ni, which indicates a reversal in the order of melting for same-size NPs of the two elements. This reversal, also evident in the nano-phase diagram thermodynamically constructed using the regular solution model, may be useful for utilising NP coalescence as a means to design and engineer non-equilibrium NPs via gas-phase synthesis. Indeed, our MD simulations revealed different coalescence mechanisms at play depending on the conditions, leading to segregated chemical orderings such as quasi-Janus core-satellite, or core-(partial) shell NPs, despite the expected theoretical tendency for elemental mixing.
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Affiliation(s)
- Evropi Toulkeridou
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-Son Okinawa 904-0495 Japan
| | - Joseph Kioseoglou
- Department of Physics, Aristotle University of Thessaloniki GR-54124 Thessaloniki Greece
| | - Panagiotis Grammatikopoulos
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-Son Okinawa 904-0495 Japan
- Department of Materials Sciences and Engineering, Guangdong Technion - Israel Institute of Technology Shantou Guangdong 515063 China
- Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion - Israel Institute of Technology Shantou Guangdong 515063 China
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5
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Kumar A, Dutta S, Kim S, Kwon T, Patil SS, Kumari N, Jeevanandham S, Lee IS. Solid-State Reaction Synthesis of Nanoscale Materials: Strategies and Applications. Chem Rev 2022; 122:12748-12863. [PMID: 35715344 DOI: 10.1021/acs.chemrev.1c00637] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nanomaterials (NMs) with unique structures and compositions can give rise to exotic physicochemical properties and applications. Despite the advancement in solution-based methods, scalable access to a wide range of crystal phases and intricate compositions is still challenging. Solid-state reaction (SSR) syntheses have high potential owing to their flexibility toward multielemental phases under feasibly high temperatures and solvent-free conditions as well as their scalability and simplicity. Controlling the nanoscale features through SSRs demands a strategic nanospace-confinement approach due to the risk of heat-induced reshaping and sintering. Here, we describe advanced SSR strategies for NM synthesis, focusing on mechanistic insights, novel nanoscale phenomena, and underlying principles using a series of examples under different categories. After introducing the history of classical SSRs, key theories, and definitions central to the topic, we categorize various modern SSR strategies based on the surrounding solid-state media used for nanostructure growth, conversion, and migration under nanospace or dimensional confinement. This comprehensive review will advance the quest for new materials design, synthesis, and applications.
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Affiliation(s)
- Amit Kumar
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Soumen Dutta
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Seonock Kim
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Taewan Kwon
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Santosh S Patil
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Nitee Kumari
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - Sampathkumar Jeevanandham
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
| | - In Su Lee
- Creative Research Initiative Center for Nanospace-confined Chemical Reactions (NCCR) and Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.,Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul 03722, Korea
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6
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Gioria E, Ingale P, Pohl F, Naumann d'Alnoncourt R, Thomas A, Rosowski F. Boosting the performance of Ni/Al2O3 for the reverse water gas shift reaction through formation of CuNi nanoalloys. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01585k] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adding Cu to Ni/Al2O3 is an excellent strategy to suppress methane formation and enhance carbon monoxide yield through formation of alloyed nanoparticles.
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Affiliation(s)
- Esteban Gioria
- BasCat – UniCat BASF JointLab, Technische Universität Berlin, Berlin 10623, Germany
| | - Piyush Ingale
- BasCat – UniCat BASF JointLab, Technische Universität Berlin, Berlin 10623, Germany
| | - Felix Pohl
- BasCat – UniCat BASF JointLab, Technische Universität Berlin, Berlin 10623, Germany
| | | | - Arne Thomas
- Functional Materials, Department of Chemistry, Technische Universität Berlin, Berlin 10623, Germany
| | - Frank Rosowski
- BasCat – UniCat BASF JointLab, Technische Universität Berlin, Berlin 10623, Germany
- BASF SE, Process Research and Chemical Engineering, Ludwigshafen 67056, Germany
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7
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Catalytic and Photocatalytic Electrospun Nanofibers for Hydrogen Generation from Ammonia Borane Complex: A Review. Polymers (Basel) 2021; 13:polym13142290. [PMID: 34301047 PMCID: PMC8309258 DOI: 10.3390/polym13142290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/03/2021] [Accepted: 07/06/2021] [Indexed: 11/18/2022] Open
Abstract
Hydrogen (H2) is a promising renewable energy source that can replace fossil fuels since it can solve several environmental and economic issues. However, the widespread usage of H2 is constrained by its storage and safety issues. Many researchers consider solid materials with an excellent capacity for H2 storage and generation as the solution for most H2-related issues. Among solid materials, ammonia borane (abbreviated hereafter as AB) is considered one of the best hydrogen storage materials due to its extraordinary H2 content and small density. However, the process must be conducted in the presence of efficient catalysts to obtain a reasonable amount of generated H2. Electrospun nanofibrous catalysts are a new class of efficient catalysts that involves the usage of polymers. Here, a comprehensive review of the ceramic-supported electrospun NF catalysts for AB hydrolysis is presented, with a special focus on catalytic and photolytic performance and preparation steps. Photocatalytic AB hydrolysis was discussed in detail due to its importance and promising results. AB photocatalytic hydrolysis mechanisms under light were also explained. Electrospun catalysts show excellent activity for AB hydrolysis with good recyclability. Kinetics studies show that the AB hydrolysis reaction is independent of AB concentration and the first-order reaction of NF catalysts.
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8
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Geoffrion LD, José-Yacaman M, Lehr A, Yang SZ, Sanchez J, Velazquez-Salazar JJ, Guisbiers G. Substitutional-interstitial structural transition in Cu-Pt nano-alloys. NANOSCALE ADVANCES 2021; 3:3746-3751. [PMID: 36133014 PMCID: PMC9418689 DOI: 10.1039/d1na00204j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 05/27/2021] [Indexed: 06/16/2023]
Abstract
Copper-platinum alloys are important binary alloys in catalysis. In this communication, we demonstrate that it is possible to preserve the thermal properties of platinum with a copper-platinum alloy by converting the substitutional alloy into an interstitial one. This conversion occurs when the size of the copper-platinum system is reduced down to the nanoscale. The size-dependent phase diagram of Cu-Pt for a spherical nanoparticle is calculated at various sizes (50, 10 and 5 nm) demonstrating that Cu-Pt alloyed nanoparticles can be formed all over the composition range. Experimentally, the electron microscopy characterization of copper-platinum alloyed nanoparticles synthesized by wet chemistry supports the predicted structural transition.
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Affiliation(s)
- Luke D Geoffrion
- Department of Physics & Astronomy, University of Arkansas at Little Rock 2801 South University Avenue Little Rock AR 72204 USA
| | - Miguel José-Yacaman
- Department of Applied Physics & Materials Science, Northern Arizona University 624 S. Knowles Drive Flagstaff AZ 86011 USA
| | - Alexander Lehr
- Department of Applied Physics & Materials Science, Northern Arizona University 624 S. Knowles Drive Flagstaff AZ 86011 USA
| | - Shi-Ze Yang
- Eyring Materials Center, Arizona State University 300 E University Drive Tempe AZ 85287 USA
| | - John Sanchez
- Department of Applied Physics & Materials Science, Northern Arizona University 624 S. Knowles Drive Flagstaff AZ 86011 USA
| | - J Jesus Velazquez-Salazar
- Department of Applied Physics & Materials Science, Northern Arizona University 624 S. Knowles Drive Flagstaff AZ 86011 USA
| | - Grégory Guisbiers
- Department of Physics & Astronomy, University of Arkansas at Little Rock 2801 South University Avenue Little Rock AR 72204 USA
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9
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Kim HG, Lee J, Makov G. Phase Diagram of Binary Alloy Nanoparticles under High Pressure. MATERIALS 2021; 14:ma14112929. [PMID: 34072298 PMCID: PMC8199147 DOI: 10.3390/ma14112929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/23/2021] [Accepted: 05/24/2021] [Indexed: 11/16/2022]
Abstract
CALPHAD (CALculation of PHAse Diagram) is a useful tool to construct phase diagrams of various materials under different thermodynamic conditions. Researchers have extended the use of the CALPHAD method to nanophase diagrams and pressure phase diagrams. In this study, the phase diagram of an arbitrary A–B nanoparticle system under pressure was investigated. The effects of the interaction parameter and excess volume were investigated with increasing pressure. The eutectic temperature was found to decrease in most cases, except when the interaction parameter in the liquid was zero and that in the solid was positive, while the excess volume parameter of the liquid was positive. Under these conditions, the eutectic temperature increased with increasing pressure.
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Affiliation(s)
- Han Gyeol Kim
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea;
| | - Joonho Lee
- Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea;
- Correspondence: (J.L.); (G.M.)
| | - Guy Makov
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
- Correspondence: (J.L.); (G.M.)
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10
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Eom N, Messing ME, Johansson J, Deppert K. General Trends in Core-Shell Preferences for Bimetallic Nanoparticles. ACS NANO 2021; 15:8883-8895. [PMID: 33890464 PMCID: PMC8291766 DOI: 10.1021/acsnano.1c01500] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Surface segregation phenomena dictate core-shell preference of bimetallic nanoparticles and thus play a crucial role in the nanoparticle synthesis and applications. Although it is generally agreed that surface segregation depends on the constituent materials' physical properties, a comprehensive picture of the phenomena on the nanoscale is not yet complete. Here we use a combination of molecular dynamics (MD) and Monte Carlo (MC) simulations on 45 bimetallic combinations to determine the general trend on the core-shell preference and the effects of size and composition. From the extensive studies over sizes and compositions, we find that the surface segregation and degree of the core-shell tendency of the bimetallic combinations depend on the sufficiency or scarcity of the surface-preferring material. Principal component analysis (PCA) and linear discriminant analysis (LDA) on the molecular dynamics simulations results reveal that cohesive energy and Wigner-Seitz radius are the two primary factors that have an "additive" effect on the segregation level and core-shell preference in the bimetallic nanoparticles studied. When the element with the higher cohesive energy also has the larger Wigner-Seitz radius, its core preference decreases, and thus this combination forms less segregated structures than what one would expect from the cohesive energy difference alone. Highly segregated structures (highly segregated core-shell or Janus-like) are expected to form when both the relative cohesive energy difference is greater than ∼20%, and the relative Wigner-Seitz radius difference is greater than ∼4%. Practical guides for predicting core-shell preference and degree of segregation level are presented.
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11
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Das SK, Das A, Gaboardi M, Pollastri S, Dhamale GD, Balasubramanian C, Joseph B. Large scale synthesis of copper nickel alloy nanoparticles with reduced compressibility using arc thermal plasma process. Sci Rep 2021; 11:7629. [PMID: 33828126 PMCID: PMC8026964 DOI: 10.1038/s41598-021-86776-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 03/17/2021] [Indexed: 02/01/2023] Open
Abstract
Among the various methods employed in the synthesis of nanostructures, those involving high operating temperature and sharp thermal gradients often lead to the establishment of new exotic properties. Herein, we report on the formation of Cu-Ni metallic alloy nanoparticles with greatly enhanced stiffness achieved through direct-current transferred arc-thermal plasma assisted vapour-phase condensation. High pressure synchrotron X-ray powder diffraction (XRPD) at ambient temperature as well as XRPD in the temperature range 180 to 920 K, show that the thermal arc-plasma route resulted in alloy nanoparticles with much enhanced bulk modulus compared to their bulk counterparts. Such a behaviour may find an explanation in the sudden quenching assisted by the retention of a large amount of local strain due to alloying, combined with the perfect miscibility of the elemental components during the thermal plasma synthesis process.
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Affiliation(s)
- Subrat Kumar Das
- Atmospheric Plasma Division, Institute for Plasma Research, Gandhinagar, 382016, India
| | - Arkaprava Das
- Atmospheric Plasma Division, Institute for Plasma Research, Gandhinagar, 382016, India
| | - Mattia Gaboardi
- Elettra-Sincrotrone Trieste, S.S. 14, Km 163.5 in Area Science Park, 34149, Basovizza, Italy
| | - Simone Pollastri
- Elettra-Sincrotrone Trieste, S.S. 14, Km 163.5 in Area Science Park, 34149, Basovizza, Italy
| | - G D Dhamale
- Atmospheric Plasma Division, Institute for Plasma Research, Gandhinagar, 382016, India
| | - C Balasubramanian
- Atmospheric Plasma Division, Institute for Plasma Research, Gandhinagar, 382016, India.
- Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400 094, India.
| | - Boby Joseph
- Elettra-Sincrotrone Trieste, S.S. 14, Km 163.5 in Area Science Park, 34149, Basovizza, Italy.
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12
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Taranovskyy A, Tomán JJ, Gajdics BD, Erdélyi Z. 3D phase diagrams and the thermal stability of two-component Janus nanoparticles: effects of size, average composition and temperature. Phys Chem Chem Phys 2021; 23:6116-6127. [PMID: 33683233 DOI: 10.1039/d0cp06695h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Determining binary phase diagrams for nanoparticles proves to be a very difficult task regardless if it is tried either by computer simulations, theoretical considerations or experiments. In this work, using 3D Object Stochastic Kinetic Modelling Framework (3DO-SKMF) computer simulations, we reveal some of the reasons why this is the case. First of all, even the expressions "phase diagram" and "phase composition" are usually not well-defined. We show the two different types of phase diagrams that are rarely distinguished. For phase separating nanoparticles, one diagram shows the equilibrium phase compositions in two-phase state while the other represents if the system is in an alloyed or in a separated state. We calculate both diagrams for the case of binary Janus nanoparticles and show their dependences on size and average composition. The equilibrium compositions of the phases change with both the size and the average composition of the particle. This means that the use of 3D phase diagrams is unavoidable even if the size of the particle is fixed. The careful investigation of the simulation results reveals the essential role that the interfaces play in the behaviour of the system hence in the shape of the phase diagrams. We also point out that the methods used to determine the phase compositions in nanoparticles have a substantial influence on the details of both experimentally and theoretically constructed phase diagrams.
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Affiliation(s)
- Andriy Taranovskyy
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, PO Box 400, H-4002, Debrecen, Hungary.
| | - János J Tomán
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, PO Box 400, H-4002, Debrecen, Hungary.
| | - Bence D Gajdics
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, PO Box 400, H-4002, Debrecen, Hungary. and GPM, CNRS-UMR 6634, University of Rouen Normandy, 76801, Saint-Etienne Du Rouvray, France and University of Debrecen, Doctoral School of Physics, Hungary
| | - Zoltán Erdélyi
- Department of Solid State Physics, Faculty of Science and Technology, University of Debrecen, PO Box 400, H-4002, Debrecen, Hungary.
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13
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Kuna E, Mrdenovic D, Jönsson-Niedziółka M, Pieta P, Pieta IS. Bimetallic nanocatalysts supported on graphitic carbon nitride for sustainable energy development: the shape-structure-activity relation. NANOSCALE ADVANCES 2021; 3:1342-1351. [PMID: 36132874 PMCID: PMC9416898 DOI: 10.1039/d0na01063d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 04/06/2021] [Accepted: 01/19/2021] [Indexed: 06/16/2023]
Abstract
The catalytic performance of metal nanoparticles (NPs), including activity, selectivity, and durability, depends on their shape and structure at the molecular level. Consequently, metal NPs of different size and shape, e.g., nanobelts, nanocubes, nanoflakes, and nanowires, demonstrate different reactivity and provide different reaction rates depending on the facet exposed. In this context, the present review aims to summarize the shape-structure-activity relation of metallic nanocatalysts. Moreover, keeping in mind that the application of noble metal catalysts is expensive, we would like to draw the reader's attention to bimetallic nanocatalysts supported on graphitic carbon nitride. One of the advantages of these systems is the possibility to minimize the use of noble metals by introducing another metal either to the parent NPs and/or modifying the support materials. The development and optimization of bimetallic nanocatalysts might provide the new class of materials with superior, tunable performance, thermal stability and reduced costs compared to presently available commercial catalysts. Therefore, further application of these bimetallic composites for sustainable development in energy, green chemicals/fuels and environmental protection will be discussed.
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Affiliation(s)
- Ewelina Kuna
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | - Dusan Mrdenovic
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | | | - Piotr Pieta
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
| | - Izabela S Pieta
- Institute of Physical Chemistry Polish Academy of Sciences 01-224 Warsaw Poland
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14
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Bimetal CuFe Nanoparticles—Synthesis, Properties, and Applications. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11051978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bimetal CuFe (copper-iron) nanoparticles, which are based on the earth-abundant and inexpensive metals, have generated a great deal of interest in recent years. The possible modification of the chemical and physical properties of these nanoparticles by changing their size, structure, and composition has contributed to the development of material science. At the same time, the strong tendency of these elements to oxidize under atmospheric conditions makes the synthesis of pure bimetallic CuFe nanoparticles still a great challenge. This review reports on different synthetic approaches to bimetallic CuFe nanoparticles and bimetallic CuFe nanoparticles supported on various materials (active carbide, carbide nanotubes, silica, graphite, cellulose, mesoporous carbide), their structure, physical, and chemical properties, as well as their utility as catalysts, including electrocatalysis and photocatalysis.
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15
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Zhang H, Pan J, Zhou Q, Xia F. Nanometal Thermocatalysts: Transformations, Deactivation, and Mitigation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005771. [PMID: 33458963 DOI: 10.1002/smll.202005771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Nanometals have been proven to be efficient thermocatalysts in the last decades. Their enhanced catalytic activity and tunable functionalities make them intriguing candidates for a wide range of catalytic applications, such as gaseous reactions and compound synthesis/decomposition. On the other hand, the enhanced specific surface energy and reactivity of nanometals can lead to configuration transformation and thus catalytic deactivation during the synthesis and catalysis, which largely undermines the activity and service time, thereby calling for urgent research effort to understand the deactivating mechanisms and develop efficient mitigating methods. Herein, the recent progress in understanding the configuration transformation-induced catalytic deactivation within nanometals is reviewed. The major pathways of configuration transformations, and their kinetics controlled by the environmental factors are presented. The approaches toward mitigating the transformation-induced deactivation are also presented. Finally, a perspective on the future academic approaches toward in-depth understanding of the kinetics of the deactivation of nanometals is proposed.
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Affiliation(s)
- Hanlei Zhang
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan, Hubei, 430078, P. R. China
| | - Jing Pan
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan, Hubei, 430078, P. R. China
| | - Qitao Zhou
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan, Hubei, 430078, P. R. China
| | - Fan Xia
- Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, No. 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan, Hubei, 430078, P. R. China
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16
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Chairam S, Jarujamrus P, Amatatongchai M. Enhanced catalytic activity in hydrogen production from hydrolysis of sodium borohydride using starch hydrogel-CoNi bimetallic alloys. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-02056-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Kwon T, Jun M, Lee K. Catalytic Nanoframes and Beyond. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001345. [PMID: 32633878 DOI: 10.1002/adma.202001345] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/01/2020] [Accepted: 04/09/2020] [Indexed: 06/11/2023]
Abstract
The ever-increasing need for the production and expenditure of sustainable energy is a result of the astonishing rate of consumption of fossil fuels and the accompanying environmental problems. Emphasis is being directed to the generation of sustainable energy by the fuel cell and water splitting technologies. Accordingly, the development of highly efficient electrocatalysts has attracted significant interest, as the fuel cell and water splitting technologies are critically dependent on their performance. Among numerous catalyst designs under investigation, nanoframe catalysts have an intrinsically large surface area per volume and a tunable composition, which impacts the number of catalytically active sites and their intrinsic catalytic activity, respectively. Nevertheless, the structural integrity of the nanoframe during electrochemical operation is an ongoing concern. Some significant advances in the field of nanoframe catalysts have been recently accomplished, specifically geared to resolving the catalytic stability concerns and significantly boosting the intrinsic catalytic activity of the active sites. Herein, general synthetic concepts of nanoframe structures and their structure-dependent catalytic performance are summarized, along with recent notable advances in this field. A discussion on the remaining challenges and future directions, addressing the limitations of nanoframe catalysts, are also provided.
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Affiliation(s)
- Taehyun Kwon
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Minki Jun
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
| | - Kwangyeol Lee
- Department of Chemistry and Research Institute for Natural Sciences, Korea University, Seoul, 02841, Republic of Korea
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18
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Dean J, Cowan MJ, Estes J, Ramadan M, Mpourmpakis G. Rapid Prediction of Bimetallic Mixing Behavior at the Nanoscale. ACS NANO 2020; 14:8171-8180. [PMID: 32515581 DOI: 10.1021/acsnano.0c01586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The nanoparticle (NP) design space allows for variations in size, shape, composition, and chemical ordering. In the search for low-energy structures, this results in an extremely large search space which cannot be screened by brute force methods. In this work, we develop a genetic algorithm to predict stable bimetallic NPs of any size, shape, and metal composition. Our method predicts nanostructures in agreement with experimental trends and it captures the detailed chemical ordering of an experimental 23,196-atom FePt NP with nearly atom-by-atom accuracy. Our developed screening process is extremely fast, allowing us to generate and analyze a database of 5454 low-energy bimetallic NPs. By identifying thermodynamically stable NPs, we rationalize bimetallic mixing at the nanoscale and reveal metal-, size-, and temperature-dependent mixing behavior. Importantly, our method is applicable to any bimetallic NP size, bridging the materials gap in nanoscale simulations, and guides experimentation in the lab by elucidating stability, mixing, and detailed chemical ordering behavior of bimetallic NPs.
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Affiliation(s)
- James Dean
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Michael J Cowan
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Jonathan Estes
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Mahmoud Ramadan
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Giannis Mpourmpakis
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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19
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Basavegowda N, Patra JK, Baek KH. Essential Oils and Mono/bi/tri-Metallic Nanocomposites as Alternative Sources of Antimicrobial Agents to Combat Multidrug-Resistant Pathogenic Microorganisms: An Overview. Molecules 2020; 25:E1058. [PMID: 32120930 PMCID: PMC7179174 DOI: 10.3390/molecules25051058] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/24/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023] Open
Abstract
Over the past few decades, many pathogenic bacteria have become resistant to existing antibiotics, which has become a threat to infectious disease control worldwide. Hence, there has been an extensive search for new, efficient, and alternative sources of antimicrobial agents to combat multidrug-resistant pathogenic microorganisms. Numerous studies have reported the potential of both essential oils and metal/metal oxide nanocomposites with broad spectra of bioactivities including antioxidant, anticancer, and antimicrobial attributes. However, only monometallic nanoparticles combined with essential oils have been reported on so far with limited data. Bi- and tri-metallic nanoparticles have attracted immense attention because of their diverse sizes, shapes, high surface-to-volume ratios, activities, physical and chemical stability, and greater degree of selectivity. Combination therapy is currently blooming and represents a potential area that requires greater attention and is worthy of future investigations. This review summarizes the synergistic effects of essential oils with other antimicrobial combinations such as mono-, bi-, and tri-metallic nanocomposites. Thus, the various aspects of this comprehensive review may prove useful in the development of new and alternative therapeutics against antibiotic resistant pathogens in the future.
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Affiliation(s)
- Nagaraj Basavegowda
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 38451, Korea;
| | - Jayanta Kumar Patra
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Goyang 10326, Korea
| | - Kwang-Hyun Baek
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 38451, Korea;
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20
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Yumozhapova NV, Nomoev AV, Syzrantsev VV, Khartaeva EC. Formation of metal/semiconductor Cu-Si composite nanostructures. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:2497-2504. [PMID: 31921528 PMCID: PMC6941405 DOI: 10.3762/bjnano.10.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Abstract
Molecular dynamics modelling of the formation of copper and silicon composite nanostructures was carried out by using the many-particle potential method. The dependences of the internal structure on the cooling rate and the ratio of elements were investigated. The possibility of the formation of the Cu-Si nanoparticles from both a homogeneous alloy and two initial drops at short distance were shown. A comparative analysis showed that the diameter distribution of copper and silicon atoms in experimental particles coincides with the simulation results with silicon content of 50 atom %. Additionally, an estimation of the effective experimental cooling rate was made.
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Affiliation(s)
| | - Andrey V Nomoev
- Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy str., 6, Ulan-Ude 670047, Russia
| | - Vyacheslav V Syzrantsev
- Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy str., 6, Ulan-Ude 670047, Russia
| | - Erzhena Ch Khartaeva
- Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy str., 6, Ulan-Ude 670047, Russia
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21
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Bimetallic and Trimetallic Nanoparticles for Active Food Packaging Applications: A Review. FOOD BIOPROCESS TECH 2019. [DOI: 10.1007/s11947-019-02370-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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22
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Mendoza-Pérez R, Guisbiers G. Bimetallic Pt-Pd nano-catalyst: size, shape and composition matter. NANOTECHNOLOGY 2019; 30:305702. [PMID: 30965294 DOI: 10.1088/1361-6528/ab1759] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The goal of this work is to understand how the phase diagram (PHAD) of the platinum-palladium (Pt-Pd) alloy changes with size and shape and how it correlates with catalytic properties. By using nano-thermodynamics, the size and shape effects on the PHAD of Pt-Pd nanoparticles were determined theoretically. The PHAD of some nanoparticles (sphere, tetrahedron, octahedron, decahedron, cube, cuboctahedron and rhombic dodecahedron) exhibits a congruent melting point that becomes more and more pronounced when the size decreases. At the right of the congruent melting point i.e. close to the Pt-rich side, the coexistence region exhibits a contraction while an expansion is noticed at larger palladium concentrations. From the Gibbs free energy analysis, the stability of all the considered shapes has been determined versus temperature and composition. Furthermore, the surface segregation was also calculated and it is shown that the surface segregation is reversed at very small sizes. Indeed, below a critical size, Pd does not segregate anymore at the surface like it normally does for larger nanoparticles; but Pt does. The critical size range has been determined for each considered shape; and within this range Pt and Pd co-exist at the surface. Finally, the most catalytically active shapes are predicted to be the tetrahedron and the cube in agreement with the available experimental data and other theoretical results.
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Affiliation(s)
- Rafael Mendoza-Pérez
- Instituto de Investigaciones en Materiales, UNAM, Circuito Exterior s/n, Ciudad Universitaria, Coyoacán, 04510 CDMX, México
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23
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Polak M, Rubinovich L. Thermal properties and segregation phenomena in transition metals and alloys: modeling based on modified cohesive-energies. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:215402. [PMID: 30780149 DOI: 10.1088/1361-648x/ab0865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In spite of free-atom electronic-relaxation contributions to transition-metal cohesive-energies, numerous studies have misused the latter instead of using the solid-state interatomic bond-energy in modeling bulk and surface properties. This work reveals that eliminating the free-atom contributions from experimental cohesive-energies leads to highly accurate linear correlations of the resultant bond-energies with melting temperatures and enthalpies, as well as with inverse thermal-expansion coefficients, specifically for the fcc transition-metals. Likewise, predictions of surface segregation phenomena in Cu-Pd and Au-Pd alloys on the basis of the modified energetics are in much better agreement with reported low-energy ion scattering spectroscopy (LEISS) experimental results, as compared to the use of cohesive-energy values. A last demonstration of the problem and its solution involves the significant impact of the modification on segregation (separation) phase transitions in Cu-Ni model nanoparticles.
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Affiliation(s)
- Micha Polak
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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24
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Zhao G, Hu D, Zhou S, Zhang J, Wang L. Supported CuNi Alloy Catalyzed N-Alkylation of Bioderived 2,5-Dihydroxymethylfuran With Aniline. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00590] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Guangyuan Zhao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, P. R. China
| | - Danxin Hu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, P. R. China
| | - Shenghu Zhou
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jian Zhang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, P. R. China
| | - Lei Wang
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, P. R. China
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25
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Shishulin AV, Fedoseev VB. On some peculiarities of stratification of liquid solutions within pores of fractal shape. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Nie X, Li W, Jiang X, Guo X, Song C. Recent advances in catalytic CO2 hydrogenation to alcohols and hydrocarbons. ADVANCES IN CATALYSIS 2019. [DOI: 10.1016/bs.acat.2019.10.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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27
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Wang Q, Lu X, Zhen Y, Li WQ, Chen GH, Yang Y. Structure, stability, electronic, magnetic, and catalytic properties of monometallic Pd, Au, and bimetallic Pd-Au core-shell nanoparticles. J Chem Phys 2018; 149:244307. [PMID: 30599716 DOI: 10.1063/1.5066332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Bimetallic core-shell nanoparticles (CSNPs) often exhibit excellent and tunable properties, depending on their composition, sizes, morphology, atomic arrangement, thickness, and sequence of both core and shell. In this study, the geometrical structure, thermodynamic stability, chemical activity, electronic and magnetic properties, and catalytic activity in the hydrogen evolution reaction (HER) of 13- and 55-atom Pd, Au NPs, and Pd-Au CSNPs were systematically investigated using density functional theory calculations. The results showed that Au atoms prefer to segregate to the surface-shell, while Pd atoms were inclined to aggregate in the core region for bimetallic Pd-Au CSNPs; therefore, Pd@Au CSNPs with an Au surface-shell were thermodynamically more favorable than both the monometallic Pd/Au NPs and the Au@Pd CSNPs with a Pd surface-shell. The Pd surface-shell of the Au@Pd CSNPs displayed a positive charge, while the Au surface-shell of the Au@Pd CSNPs exhibited a negative charge due to the charge transfer in the Pd-Au CSNPs, resulting in that the d-band center of Au@Pd with the Pd surface-shell showed larger shift toward the Fermi level and higher chemical activity. The Pd@Au CSNPs with the Au surface-shell showed similar d-band curves and d-band centers with monometallic Au NPs. All 13-atom Pd, Au NPs, and Pd-Au CSNPs were magnetic, while the 55-atom NPs were non-magnetic with symmetry partial density of states' curves except for Pd55. Changing the location of Pd and Au atoms in the Pd-Au CSNPs influenced their total magnetic moments. In addition, an opposite trend was found: small 13-atom NPs with a Pd surface-shell showed superior HER activity to the ones with an Au surface-shell, while large 55-atom NPs with an Au surface-shell possessed higher HER activity than the ones with a Pd surface-shell.
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Affiliation(s)
- Qiang Wang
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
| | - Xianfei Lu
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
| | - Yanzhong Zhen
- School of Petroleum Engineering and Environmental Engineering, Yanan University, Yan'an 716000, Shaanxi, People's Republic of China
| | - Wei-Qi Li
- Department of Physics, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Guang-Hui Chen
- Department of Chemistry, Shantou University, Guangdong, Shantou 515063, People's Republic of China
| | - Yanhui Yang
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis (IAS), Nanjing Tech University, Nanjing 211816, People's Republic of China
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28
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Park J, Kwon T, Kim J, Jin H, Kim HY, Kim B, Joo SH, Lee K. Hollow nanoparticles as emerging electrocatalysts for renewable energy conversion reactions. Chem Soc Rev 2018; 47:8173-8202. [PMID: 30009297 DOI: 10.1039/c8cs00336j] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
While the realization of clean and sustainable energy conversion systems primarily requires the development of highly efficient catalysts, one of the main issues had been designing the structure of the catalysts to fulfill minimum cost as well as maximum performance. Until now, noble metal-based nanocatalysts had shown outstanding performances toward the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). However, the scarcity and high cost of them impeded their practical use. Recently, hollow nanostructures including nanocages and nanoframes had emerged as a burgeoning class of promising electrocatalysts. The hollow nanostructures could expose a high proportion of active surfaces while saving the amounts of expensive noble metals. In this review, we introduced recent advances in the synthetic methodologies for generating noble metal-based hollow nanostructures based on thermodynamic and kinetic approaches. We summarized electrocatalytic applications of hollow nanostructures toward the ORR, OER, and HER. We next provided strategies that could endow structural robustness to the flimsy structural nature of hollow structures. Finally, we concluded this review with perspectives to facilitate the development of hollow nanostructure-based catalysts for energy applications.
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Affiliation(s)
- Jongsik Park
- Department of Chemistry, Korea University, Seoul 02841, Republic of Korea.
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29
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Li MMJ, Tsang SCE. Bimetallic catalysts for green methanol production via CO2 and renewable hydrogen: a mini-review and prospects. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00304a] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This mini review discusses the recent advancements in the use of bimetallic catalysts for green methanol production via CO2 hydrogenation.
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30
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Akbarzadeh H, Mehrjouei E, Ramezanzadeh S, Izanloo C. Ni-Co bimetallic nanoparticles with core-shell, alloyed, and Janus structures explored by MD simulation. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.10.135] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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31
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Bechelli S, Gonzalez B, Piquet V, Essafri I, Desgranges C, Delhommelle J. Free Energy of Nucleation and Interplay between Size and Composition in CuNi Systems. J Phys Chem B 2017; 121:8558-8563. [DOI: 10.1021/acs.jpcb.7b06028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Solene Bechelli
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
| | - B. Gonzalez
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
| | - Vincent Piquet
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
| | - Ilham Essafri
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
| | - Caroline Desgranges
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
| | - Jerome Delhommelle
- Department of Chemistry, University of North Dakota, Grand
Forks, North Dakota 58202, United States
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32
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Hurtado RB, Cortez-Valadez M, Arizpe-Chávez H, Flores-Lopez NS, Álvarez RAB, Flores-Acosta M. Nanowire networks and hollow nanospheres of Ag-Au bimetallic alloys at room temperature. NANOTECHNOLOGY 2017; 28:115606. [PMID: 28211363 DOI: 10.1088/1361-6528/aa5c7a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Due to their physicochemical properties, metallic nanoalloys have potential applications in biomedicine, electrocatalysis and electrochemical sensors, among many other fields. New alternative procedures have emerged in order to reduce production costs and the use of toxic substances. In this study we present a novel low-toxicity synthesis method for the fabrication of nanowire networks (NWNs) and Ag-Au hollow nanospheres. The synthesis process is performed at room temperature without any sophisticated equipment, such as special cameras or furnaces, etc. Transmission electron microscopy showed that the NWNs contain random alloys with a diameter of between 10-13 nm. The radius for the hollow nanospheres is approximately located between 70-130 nm. The absorption bands in the UV-vis spectrum associated with the surface plasmon in Ag-Au bimetallic nanoparticles are highlighted at 385 nm for the NWNs and 643 nm for the hollow nanospheres. The study was performed with low-toxicity substances, such as rongalite, ascorbic acid and sucrose, and showed high efficiency for the fabrication of these types of nanostructures, as well as good stability for long periods of time.
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Affiliation(s)
- R Britto Hurtado
- Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-88, 83190, Hermosillo, Sonora, Mexico
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33
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Cui M, Lu H, Jiang H, Cao Z, Meng X. Phase Diagram of Continuous Binary Nanoalloys: Size, Shape, and Segregation Effects. Sci Rep 2017; 7:41990. [PMID: 28169320 PMCID: PMC5294570 DOI: 10.1038/srep41990] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 01/04/2017] [Indexed: 12/03/2022] Open
Abstract
The phase diagrams of continuous binary nanoalloys are important in providing guidance for material designs and industrial applications. However, experimental determination of the nano-phase diagram is scarce since calorimetric measurements remain quite challenging at the nanoscale. Based on the size-dependent cohesive energy model, we developed a unified nano-thermodynamic model to investigate the effects of the size, shape, and segregation on the phase diagrams of continuous binary nanoalloys. The liquidus/solidus dropped in temperature, two-phase zone was narrowed, and the degree of surface segregation decreased with decrease in the size or increase in the shape factor. The congruent melting point of Cu-Au nanoalloys with and without segregation is linearly shifted to higher Au component and lower temperature with decreasing size or increasing shape factor. By reviewing surface segregated element of different binary nanoalloys, two segregation rules based on the solid surface energy and atomic size have been identified. Moreover, the established model can be employed to describe other physicochemical properties of nanoalloys, e.g. the cohesive energy, catalytic activation energy, and order-disorder transition temperature, and the validity is supported by available other theoretical prediction, experimental data and molecular dynamic simulations results. This will help the experimentalists by guiding them in their attempts to design bimetallic nanocrystals with the desired properties.
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Affiliation(s)
- Mingjin Cui
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University, Jiangsu, PR China
| | - Haiming Lu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University, Jiangsu, PR China
| | - Haiping Jiang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University, Jiangsu, PR China
| | - Zhenhua Cao
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University, Jiangsu, PR China
| | - Xiangkang Meng
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University, Jiangsu, PR China
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Fang L, Wang W, Liu Y, Xie Z, Chen L. Janus nanostructures formed by mesoporous silica coating Au nanorods for near-infrared chemo–photothermal therapy. J Mater Chem B 2017; 5:8833-8838. [DOI: 10.1039/c7tb02144e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Mesoporous silica was partly coated on AuNRs (Janus AuNRs@mSiO2) as a hyperthermia and drug delivery platform for chemo–photothermal therapy.
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Affiliation(s)
- Lin Fang
- Department of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Weiqi Wang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Yang Liu
- Department of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
| | - Zhigang Xie
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Li Chen
- Department of Chemistry
- Northeast Normal University
- Changchun
- P. R. China
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35
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Cui M, Lu H, Jiang H, Meng X. Comment on "Electrum, the Gold-Silver Alloy, from the Bulk Scale to the Nanoscale: Synthesis, Properties, and Segregation Rules". ACS NANO 2016; 10:10618-10619. [PMID: 28024343 DOI: 10.1021/acsnano.6b03701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Mingjin Cui
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University , Nanjing, Jiangsu 210093, P. R. China
| | - Haiming Lu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University , Nanjing, Jiangsu 210093, P. R. China
| | - Haiping Jiang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University , Nanjing, Jiangsu 210093, P. R. China
| | - Xiangkang Meng
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Institute of Materials Engineering, Nanjing University , Nanjing, Jiangsu 210093, P. R. China
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36
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Polak M, Rubinovich L. Nano-size scaling of alloy intra-particle vs. inter-particle separation transitions: prediction of distinctly interface-affected critical behaviour. Phys Chem Chem Phys 2016; 18:18391-7. [PMID: 27338842 DOI: 10.1039/c6cp02444k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phase-separation second-order transitions in binary alloy particles consisting of ∼1000 up to ∼70 000 atoms (∼1-10 nm) are modeled focusing on the unexplored issue of finite-size scaling in such systems, particularly on evaluation of correlation-length critical exponents. Our statistical-thermodynamic approach is based on mean-field analytical expression for the Ising model free energy that facilitates highly efficient computations furnishing comprehensive data for fcc rectangular nanoparticles (NPs). These are summed up in intra- and inter-particle scaling plots as well as in nanophase separation diagrams. Temperature-induced variations in the interface thickness in Janus-type intra-particle configurations and NP size-dependent shifts in the critical temperature of their transition to solid-solution reflect power-law behavior with the same critical exponent, ν = 0.83. It is attributed to dominant interfacial effects that are absent in inter-particle transitions. Variations in ν with nano-size, as revealed by a refined analysis, are linearly extrapolated in order to bridge the gap to larger particles within and well beyond the nanoscale, ultimately yielding ν = 1.0. Besides these findings, the study indicates the key role of the surface-area to volume ratio as an effective linear size, revealing a universal, particle-shape independent, nanoscaling of the critical-temperature shifts.
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Affiliation(s)
- M Polak
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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37
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Guisbiers G, Mendoza-Cruz R, Bazán-Díaz L, Velázquez-Salazar JJ, Mendoza-Perez R, Robledo-Torres JA, Rodriguez-Lopez JL, Montejano-Carrizales JM, Whetten RL, José-Yacamán M. Electrum, the Gold-Silver Alloy, from the Bulk Scale to the Nanoscale: Synthesis, Properties, and Segregation Rules. ACS NANO 2016; 10:188-98. [PMID: 26605557 PMCID: PMC4734609 DOI: 10.1021/acsnano.5b05755] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 11/20/2015] [Indexed: 05/26/2023]
Abstract
The alloy Au-Ag system is an important noble bimetallic phase, both historically (as "Electrum") and now especially in nanotechnology, as it is applied in catalysis and nanomedicine. To comprehend the structural characteristics and the thermodynamic stability of this alloy, a knowledge of its phase diagram is required that considers explicitly its size and shape (morphology) dependence. However, as the experimental determination remains quite challenging at the nanoscale, theoretical guidance can provide significant advantages. Using a regular solution model within a nanothermodynamic approach to evaluate the size effect on all the parameters (melting temperature, melting enthalpy, and interaction parameters in both phases), the nanophase diagram is predicted. Besides an overall shift downward, there is a "tilting" effect on the solidus-liquidus curves for some particular shapes exposing the (100) and (110) facets (cube, rhombic dodecahedron, and cuboctahedron). The segregation calculation reveals the preferential presence of silver at the surface for all the polyhedral shapes considered, in excellent agreement with the latest transmission electron microscopy observations and energy dispersive spectroscopy analysis. By reviewing the nature of the surface segregated element of different bimetallic nanoalloys, two surface segregation rules, based on the melting temperatures and surface energies, are deduced. Finally, the optical properties of Au-Ag nanoparticles, calculated within the discrete dipole approximation, show the control that can be achieved in the tuning of the local surface plasmon resonance, depending of the alloy content, the chemical ordering, the morphology, the size of the nanoparticle, and the nature of the surrounding environment.
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Affiliation(s)
- Grégory Guisbiers
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
| | - Rubén Mendoza-Cruz
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
- Institute
of Physics, Universidad Nacional Autónoma
de Mexico, A. P. 20-364
Distrito Federal C.P. 01000 Mexico City, Mexico
| | - Lourdes Bazán-Díaz
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
- Institute
of Physics, Universidad Nacional Autónoma
de Mexico, A. P. 20-364
Distrito Federal C.P. 01000 Mexico City, Mexico
| | - J. Jesús Velázquez-Salazar
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
| | - Rafael Mendoza-Perez
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
| | - José Antonio Robledo-Torres
- Advanced Materials
Department, IPICYT, A.C., Camino Presa San José 2055, Lomas 4a Secc. 78216 San Luis Potosi, Mexico
| | - José-Luis Rodriguez-Lopez
- Advanced Materials
Department, IPICYT, A.C., Camino Presa San José 2055, Lomas 4a Secc. 78216 San Luis Potosi, Mexico
| | | | - Robert L. Whetten
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
| | - Miguel José-Yacamán
- Department
of Physics & Astronomy, University of
Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United
States
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38
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Guo H, Jin J, Chen Y, Liu X, Zeng D, Wang L, Peng DL. Controllable synthesis of Cu–Ni core–shell nanoparticles and nanowires with tunable magnetic properties. Chem Commun (Camb) 2016; 52:6918-21. [DOI: 10.1039/c6cc02868c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The controlled epitaxial growth of Ni shells on Cu cores provided selectively exposed surfaces and morphologies and tunable magnetic properties.
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Affiliation(s)
- Huizhang Guo
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Jiarui Jin
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Yuanzhi Chen
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Xiang Liu
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Deqian Zeng
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Laisen Wang
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
| | - Dong-Liang Peng
- Department of Materials Science and Engineering
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Material
- Xiamen University
- Xiamen 361005
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39
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Mishra K, Basavegowda N, Lee YR. Access to enhanced catalytic core–shell CuO–Pd nanoparticles for the organic transformations. RSC Adv 2016. [DOI: 10.1039/c6ra03883b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This paper describes the biosynthesis of core–shell CuO–Pd nanocatalysts with the aid of a Cyperus rotundus rhizome extract.
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Affiliation(s)
- Kanchan Mishra
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
| | - Nagaraj Basavegowda
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
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40
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Shimizu R, Kawakami T, Takashima Y, Tsuruoka T, Akamatsu K. In situ synthesis of Cu/Ni alloy nanoparticles embedded in thin polymer layers. RSC Adv 2016. [DOI: 10.1039/c6ra00240d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In situ formation of Cu–Ni alloy nanoparticles with controlled composition in thin polyimide layers was investigated.
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Affiliation(s)
- Ryo Shimizu
- Department of Nanobiochemistry
- Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe 650-0047
- Japan
| | - Takaya Kawakami
- Department of Nanobiochemistry
- Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe 650-0047
- Japan
| | - Yohei Takashima
- Department of Nanobiochemistry
- Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe 650-0047
- Japan
| | - Takaaki Tsuruoka
- Department of Nanobiochemistry
- Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe 650-0047
- Japan
| | - Kensuke Akamatsu
- Department of Nanobiochemistry
- Frontiers of Innovative Research in Science and Technology (FIRST)
- Konan University
- Kobe 650-0047
- Japan
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41
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Shirinyan AS. Two-phase equilibrium states in individual Cu-Ni nanoparticles: size, depletion and hysteresis effects. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:1811-1820. [PMID: 26425433 PMCID: PMC4578438 DOI: 10.3762/bjnano.6.185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 08/09/2015] [Indexed: 06/05/2023]
Abstract
In isolated bimetallic nanoscale systems the limit amount of matter and surface-induced size effects can change the thermodynamics of first-order phase transformation. In this paper we present theoretical modification of Gibbs free energy concept describing first-order phase transformation of binary alloyed nanoparticles taking into account size effects as well as depletion and hysteresis effects. In such a way the hysteresis in a form of nonsymmetry for forth and back transforming paths takes place; compositional splitting and the loops-like splitted path on the size dependent temperature-composition phase diagram occur. Our calculations for individual Cu-Ni nanoparticle show that one must differentiate the solubility curves and the equilibrium loops (discussed here in term of solidification and melting loops). For the first time we have calculated and present here on the temperature-composition phase diagram the nanomelting loop at the size of 80 nm and the nanosolidification loop at the size of 25 nm for an individual Cu-Ni nanoparticle. So we observe the difference between the size-dependent phase diagram and solubility diagram, between two-phase equilibrium curves and solubility curves; also intersection of nanoliquidus and nanosolidus is available. These findings lead to the necessity to reconsider such basic concepts in materials science as phase diagram and solubility diagram.
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Affiliation(s)
- Aram S Shirinyan
- “Physicochemical materials science” center of National Academy of Sciences of Ukraine and Kyiv National University, Physics Faculty, Kyiv Taras Shevchenko National University, vul. Volodymyrska 61, 01601, Kyiv, Ukraine, phone: +380972984512, fax: +380445262326
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42
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Pavan L, Baletto F, Novakovic R. Multiscale approach for studying melting transitions in CuPt nanoparticles. Phys Chem Chem Phys 2015; 17:28364-71. [DOI: 10.1039/c5cp01096a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Melting temperature dependence on the radius of CuPt clusters by CALPHAD and atomistic molecular dynamics simulations. The formation of a supercooled region for 3 nm particle is highlighted by the huge hysteresis during the freezing process.
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Affiliation(s)
- Luca Pavan
- Physics Department
- King's College London
- UK
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43
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Panizon E, Olmos-Asar JA, Peressi M, Ferrando R. Study of structures and thermodynamics of CuNi nanoalloys using a new DFT-fitted atomistic potential. Phys Chem Chem Phys 2015; 17:28068-75. [DOI: 10.1039/c5cp00215j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structure and thermodynamics of CuNi nanoalloys determined by a new DFT-fitted atomistic potential.
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Affiliation(s)
| | | | - Maria Peressi
- Department of Physics
- University of Trieste
- 34151 Trieste
- Italy
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44
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Zhao N, He YQ, Yang CC. A new approach to construct bulk and size-dependent continuous binary solution phase diagrams of alloys. RSC Adv 2015. [DOI: 10.1039/c5ra18541f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
In this work, we report a new approach to construct both bulk and size-dependent continuous binary solution phase diagrams (e.g. the Au–Ag system) by combining ab initio molecular dynamics simulation and nanothermodynamics modeling.
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Affiliation(s)
- N. Zhao
- Key Laboratory of Automobile Materials (Jilin University)
- Ministry of Education
- School of Materials Science and Engineering
- Jilin University
- Changchun 130022
| | - Y. Q. He
- Cardiovascular Medicine
- Sino-Japan Friendship Hospital, Jilin University
- Changchun 130033
- China
| | - C. C. Yang
- Key Laboratory of Automobile Materials (Jilin University)
- Ministry of Education
- School of Materials Science and Engineering
- Jilin University
- Changchun 130022
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45
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Polak M, Rubinovich L. Thermally-induced chemical-order transitions in medium–large alloy nanoparticles predicted using a coarse-grained layer model. Phys Chem Chem Phys 2015; 17:28211-8. [DOI: 10.1039/c5cp00497g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new coarse-grained layer model (CGLM) predicts symmetry-breaking transitions in Pt–Ir nanoparticles furnishing a unique nanophase diagram.
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Affiliation(s)
- Micha Polak
- Department of Chemistry
- Ben-Gurion University of the Negev
- Beer-Sheva 84105
- Israel
| | - Leonid Rubinovich
- Department of Chemistry
- Ben-Gurion University of the Negev
- Beer-Sheva 84105
- Israel
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