1
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Mendoza-Cruz R, Palomares-Báez JP, López-López SM, Montejano-Carrizales JM, Rodríguez López JL, José Yacamán M, Bazán-Díaz L. Experimental High-Resolution Observation of the Truncated Double-Icosahedron Structure: A Stable Twinned Shell in Alloyed Au-Ag Core@Shell Nanoparticles. Nano Lett 2024; 24:4072-4081. [PMID: 38557078 PMCID: PMC11010228 DOI: 10.1021/acs.nanolett.3c04435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
Given the binary nature of nanoalloy systems, their properties are dependent on their size, shape, structure, composition, and chemical ordering. When energy and entropic factors for shapes and structure variations are considered in nanoparticle growth, the spectra of shapes become so vast that even metastable arrangements have been reported under ambient conditions. Experimental and theoretical variations of multiply twinned particles have been observed, from the Ino and Marks decahedra to polyicosahedra and polydecahedra with comparable energetic stability among them. Herein, we report the experimental production of a stable doubly truncated double-icosahedron structure (TdIh) in Au-Ag nanoparticles, in which a twinned Ag-rich alloyed shell is reconstructed on a Au-Ag alloyed Ino-decahedral core. The structure, chemical composition, and growth pathway are proposed on the basis of high-angle annular dark-field scanning transmission electron microscopy analysis and excess energy calculations, while its structural stability is estimated by large-scale atomic molecular dynamics simulations. This novel nanostructure differs from other structures previously reported.
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Affiliation(s)
- Rubén Mendoza-Cruz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | - Juan Pedro Palomares-Báez
- Facultad
de Ciencias Químicas, Universidad
Autónoma de Chihuahua, Circuito Universitario s/n, Campus II, Chihuahua, Mexico 31125
| | - Stephan Mario López-López
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
- Posgrado
en Ciencia e Ingeniería de Materiales, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
| | | | - José Luis Rodríguez López
- Advanced
Materials Department, Instituto Potosino
de Investigación Científica y Tecnológica, A.C., San Luis Potosí, Mexico 78216
| | - Miguel José Yacamán
- Department
of Applied Physics and Materials Science and MIRA, Northern Arizona University, Flagstaff, Arizona 86011, United States
| | - Lourdes Bazán-Díaz
- Instituto
de Investigaciones en Materiales, Universidad
Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de México, Mexico 04510
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2
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Zouchoune B, Saillard JY. Atom-Precise Ligated Copper and Copper-Rich Nanoclusters with Mixed-Valent Cu(I)/Cu(0) Character: Structure-Electron Count Relationships. Molecules 2024; 29:605. [PMID: 38338350 PMCID: PMC10856471 DOI: 10.3390/molecules29030605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 02/12/2024] Open
Abstract
Copper homometallic and copper-rich heterometallic nanoclusters with some Cu(0) character are reviewed. Their structure and stability are discussed in terms of their number of "free" electrons. In many aspects, this structural chemistry differs from that of their silver or copper homologs. Whereas the two-electron species are by far the most numerous, only one eight-electron species is known, but more electron-rich nanoclusters have also been reported. Owing to the relatively recent development of this chemistry, it is likely that more electron-rich species will be reported in the future.
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Affiliation(s)
- Bachir Zouchoune
- Unité de Recherche de Chimie de l’Environnement et Moléculaire Structurale, Université Constantine 1 (Mentouri), Constantine 25000, Algeria;
- Laboratoire de Chimie Appliquée et Technologie des Matériaux, Université Larbi Ben M’Hidi-Oum El Bouaghi, Oum El Bouaghi 04000, Algeria
| | - Jean-Yves Saillard
- Univ Rennes, CNRS, Institut des Sciences Chimiques de Rennes-UMR 6226, 35000 Rennes, France
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3
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Aleinikava D, Jellinek J. Analysis of Dynamical Peculiarities in Nanoalloys at Subsystems Level: Dynamical Degrees of Freedom, Temperature Differences, and the Chameleon Effect. Chemphyschem 2023; 24:e202300184. [PMID: 37582049 DOI: 10.1002/cphc.202300184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/17/2023]
Abstract
A novel analysis of the dynamical behavior of nanoalloy systems, as represented by model Ni/Al 13-atom clusters, over a broad range of energies that cover the stage-wise transition of the systems from their solid-like to liquid-like state is presented. Conceptually, the analysis is rooted in partitioning the systems into judiciously chosen subsystems and characterizing the latter in terms of subsystem-specific dynamical descriptors that include dynamical degrees of freedom, root-mean-square bond-length fluctuation, and element-specific subsystem temperature. The analysis reveals a host of intriguing new peculiarities in the dynamical behavior of the Ni/Al 13-mers, among which are what we call the chameleon effect and the difference in the temperatures of the Ni and Al subsystems at high energies, a difference that strongly depends on the cluster composition and also changes with energy. These do not have an analog in pure Ni13 and Al13 and are explained in terms of the coupled effects of the difference between the masses of the Ni and Al atoms (the mass effect) and of the difference in the anharmonicity of the overall interaction potential as experienced by the Ni and Al subsystems of the clusters (the potential effect).
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Affiliation(s)
- Darya Aleinikava
- Department of Physical Sciences, Benedictine University Lisle, Illinois, 60532, USA
- Chemical Sciences and Engineering Division, Argonne National Laboratory Lemont, Illinois, 60439, USA
| | - Julius Jellinek
- Chemical Sciences and Engineering Division, Argonne National Laboratory Lemont, Illinois, 60439, USA
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4
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Andersson C, Serebrennikova O, Tiburski C, Alekseeva S, Fritzsche J, Langhammer C. A Microshutter for the Nanofabrication of Plasmonic Metal Alloys with Single Nanoparticle Composition Control. ACS Nano 2023; 17:15978-15988. [PMID: 37535838 PMCID: PMC10448753 DOI: 10.1021/acsnano.3c04147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
Alloying offers an increasingly important handle in nanomaterials design in addition to the already widely explored size and geometry of nanostructures of interest. As the key trait, the mixing of elements at the atomic level enables nanomaterials with physical or chemical properties that cannot be obtained by a single element alone, and subtle compositional variations can significantly impact these properties. Alongside the great potential of alloying, the experimental scrutiny of its impact on nanomaterial function is a challenge because the parameter space that encompasses nanostructure size, geometry, chemical composition, and structural atomic-level differences among individuals is vast and requires unrealistically large sample sets if statistically relevant and systematic data are to be obtained. To address this challenge, we have developed a microshutter device for spatially highly resolved physical vapor deposition in the lithography-based fabrication of nanostructured surfaces. As we demonstrate, it enables establishing compositional gradients across a surface with single nanostructure resolution in terms of alloy composition, which subsequently can be probed in a single experiment. As a showcase, we have nanofabricated arrays of AuAg, AuPd, and AgPd alloy nanoparticles with compositions systematically controlled at the level of single particle rows, as verified by energy dispersive X-ray and single particle plasmonic nanospectroscopy measurements, which we also compared to finite-difference time-domain simulations. Finally, motivated by their application in state-of-the-art plasmonic hydrogen sensors, we investigated PdAu alloy gradient arrays for their hydrogen sorption properties. We found distinctly composition-dependent kinetics and hysteresis and revealed a composition-dependent contribution of a single nanoparticle response to the ensemble average, which highlights the importance of alloy composition screening in single experiments with single nanoparticle resolution, as offered by the microshutter nanofabrication approach.
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Affiliation(s)
- Carl Andersson
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Olga Serebrennikova
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
- ConScience
AB, Läraregatan
3, 411 33 Göteborg, Sweden
| | - Christopher Tiburski
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Svetlana Alekseeva
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
- ConScience
AB, Läraregatan
3, 411 33 Göteborg, Sweden
| | - Joachim Fritzsche
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Christoph Langhammer
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
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5
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Chen L, Klemeyer L, Ruan M, Liu X, Werner S, Xu W, Koeppen A, Bücker R, Gonzalez MG, Koziej D, Parak WJ, Chakraborty I. Structural Analysis and Intrinsic Enzyme Mimicking Activities of Ligand-Free PtAg Nanoalloys. Small 2023; 19:e2206772. [PMID: 36755199 DOI: 10.1002/smll.202206772] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/16/2023] [Indexed: 05/11/2023]
Abstract
Nanozymes are nanomaterials with biocatalytic properties under physiological conditions and are one class of artificial enzymes to overcome the high cost and low stability of natural enzymes. However, surface ligands on nanomaterials will decrease the catalytic activity of the nanozymes by blocking the active sites. To address this limitation, ligand-free PtAg nanoclusters (NCs) are synthesized and applied as nanozymes for various enzyme-mimicking reactions. By taking advantage of the mutual interaction of zeolitic imidazolate frameworks (ZIF-8) and Pt precursors, a good dispersion of PtAg bimetal NCs with a diameter of 1.78 ± 0.1 nm is achieved with ZIF-8 as a template. The incorporation of PtAgNCs in the voids of ZIF-8 is confirmed with structural analysis using the atomic pair-distribution function and powder X-ray diffraction. Importantly, the PtAgNCs present good catalytic activity for various enzyme-mimicking reactions, including peroxidase-/catalase- and oxidase-like reactions. Further, this work compares the catalytic activity between PtAg NCs and PtAg nanoparticles with different compositions and finds that these two nanozymes present a converse dependency of Ag-loading on their activity. This study contributes to the field of nanozymes and presents a potential option to prepare ligand-free bimetal biocatalysts with sizes in the nanocluster regime.
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Affiliation(s)
- Lizhen Chen
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
| | - Lars Klemeyer
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
| | - Mingbo Ruan
- State Key Laboratory of Electroanalytical Chemistry, and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P. R. China
| | - Xin Liu
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
| | - Stefan Werner
- Fachbereich Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Weilin Xu
- State Key Laboratory of Electroanalytical Chemistry, and Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P. R. China
| | - Andrea Koeppen
- Fachbereich Chemie, Universität Hamburg, 20146, Hamburg, Germany
| | - Robert Bücker
- Centre for Structural Systems Biology (CSSB), Department of Chemistry, University of Hamburg, 22761, Hamburg, Germany
- Rigaku Europe SE, 63263, Neu-Isenburg, Germany
| | | | - Dorota Koziej
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761, Hamburg, Germany
| | - Wolfgang J Parak
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
| | - Indranath Chakraborty
- Fachbereich Physik, Center for Hybrid Nanostructures (CHyN), Universität Hamburg, 22761, Hamburg, Germany
- School of Nano Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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6
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Xu Y, Wei S, Zhang L, Wu Q, Wang F, Fan J, Wang D, Wu T, Cui X. Ion-Assisted Preparation of Bimetallic Porous Nanodendrites for Active and Stable Water Electrolysis. Small 2023; 19:e2207332. [PMID: 36719997 DOI: 10.1002/smll.202207332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/01/2023] [Indexed: 06/18/2023]
Abstract
Delicate electrochemical active surface area (ECSA) engineering over the exposed catalytic interface and surface topology of platinum-based nanomaterial represents an effective pathway to boost its catalytic properties toward the clean energy conversion system. Here, for the first time, the facial and universal production of dendritic Pt-based nanoalloys (Pt-Ni, Co, Fe) with highly porous feature via a novel Zn2+ -mediated solution approach is demonstrated. In the presence of Zn2+ during synthesis, the competition of different galvanic replacement reactions and consequently generated "branch-to-branch" growth mode are believed to play key roles for the in situ fabrication of such unique nanostructure. Due to the fully exposed active sites and ligand effect-induced electronic optimization, electrochemical hydrogen evolution in alkaline media on these catalysts exhibit dramatic activity enhancement, delivering a current density of 30.6 mA cm-2 at a 70 mV overpotential for the Pt3 Ni nanodendrites and over 7.4 times higher than that of commercial Pt/C. This work highlights a general and powerful ion-assisted strategy for exploiting dendritic Pt-based nanostructures with efficient activities for water electrolysis.
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Affiliation(s)
- Yanchao Xu
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, P. R. China
| | - Shuting Wei
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
| | - Lei Zhang
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, P. R. China
| | - Qiong Wu
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
| | - Feng Wang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Jinchang Fan
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
| | - Dewen Wang
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
| | - Tianzhun Wu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China
| | - Xiaoqiang Cui
- State Key Laboratory of Automotive Simulation and Control, School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun, 130012, P. R. China
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7
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Rubio-Ruiz B, Pérez-López AM, Uson L, Ortega-Liebana MC, Valero T, Arruebo M, Hueso JL, Sebastian V, Santamaria J, Unciti-Broceta A. In Cellulo Bioorthogonal Catalysis by Encapsulated AuPd Nanoalloys: Overcoming Intracellular Deactivation. Nano Lett 2023; 23:804-811. [PMID: 36648322 PMCID: PMC9912372 DOI: 10.1021/acs.nanolett.2c03593] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Bioorthogonal metallocatalysis has opened up a xenobiotic route to perform nonenzymatic catalytic transformations in living settings. Despite their promising features, most metals are deactivated inside cells by a myriad of reactive biomolecules, including biogenic thiols, thereby limiting the catalytic functioning of these abiotic reagents. Here we report the development of cytocompatible alloyed AuPd nanoparticles with the capacity to elicit bioorthogonal depropargylations with high efficiency in biological media. We also show that the intracellular catalytic performance of these nanoalloys is significantly enhanced by protecting them following two different encapsulation methods. Encapsulation in mesoporous silica nanorods resulted in augmented catalyst reactivity, whereas the use of a biodegradable PLGA matrix increased nanoalloy delivery across the cell membrane. The functional potential of encapsulated AuPd was demonstrated by releasing the potent chemotherapy drug paclitaxel inside cancer cells. Nanoalloy encapsulation provides a novel methodology to develop nanoreactors capable of mediating new-to-life reactions in cells.
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Affiliation(s)
- Belén Rubio-Ruiz
- Edinburgh
Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K.
- Department
of Medicinal and Organic Chemistry and Unit of Excellence in Chemistry
Applied to Biomedicine and Environment, Faculty of Pharmacy, Campus
Cartuja s/n, University of Granada, 18071 Granada, Spain
- GENYO,
Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avda. Ilustración 114, 18016 Granada, Spain
| | - Ana M. Pérez-López
- Edinburgh
Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K.
- TU
Berlin, Institut für
Biotechnologie, Aufgang
17-1, Level 4, Raum 472, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Laura Uson
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department
of Chemical Engineering and Environmental Technologies, University of Zaragoza, 50018 Zaragoza, Spain
| | - M. Carmen Ortega-Liebana
- Edinburgh
Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K.
- Department
of Medicinal and Organic Chemistry and Unit of Excellence in Chemistry
Applied to Biomedicine and Environment, Faculty of Pharmacy, Campus
Cartuja s/n, University of Granada, 18071 Granada, Spain
- GENYO,
Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avda. Ilustración 114, 18016 Granada, Spain
| | - Teresa Valero
- Edinburgh
Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K.
- Department
of Medicinal and Organic Chemistry and Unit of Excellence in Chemistry
Applied to Biomedicine and Environment, Faculty of Pharmacy, Campus
Cartuja s/n, University of Granada, 18071 Granada, Spain
- GENYO,
Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avda. Ilustración 114, 18016 Granada, Spain
| | - Manuel Arruebo
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department
of Chemical Engineering and Environmental Technologies, University of Zaragoza, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-
BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jose L. Hueso
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department
of Chemical Engineering and Environmental Technologies, University of Zaragoza, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-
BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Victor Sebastian
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department
of Chemical Engineering and Environmental Technologies, University of Zaragoza, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-
BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Jesus Santamaria
- Instituto
de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
- Department
of Chemical Engineering and Environmental Technologies, University of Zaragoza, 50018 Zaragoza, Spain
- Networking
Research Center on Bioengineering Biomaterials and Nanomedicine (CIBER-
BBN), Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Asier Unciti-Broceta
- Edinburgh
Cancer Research, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K.
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8
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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9
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Hamdan A, Stafford L. A Versatile Route for Synthesis of Metal Nanoalloys by Discharges at the Interface of Two Immiscible Liquids. Nanomaterials (Basel) 2022; 12:3603. [PMID: 36296793 PMCID: PMC9611028 DOI: 10.3390/nano12203603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/11/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
Discharge in liquid is a promising technique to produce nanomaterials by electrode erosion. Although its feasibility was demonstrated in many conditions, the production of nanoalloys by in-liquid discharges remains a challenge. Here, we show that spark discharge in liquid cyclohexane that is in contact with conductive solution, made of a combination of Ni-nitrate and/or Fe-nitrate and/or Co-nitrate, is suitable to produce nanoalloys (<10 nm) of Ni-Fe, Ni-Co, Co-Fe, and Ni-Co-Fe. The nanoparticles are synthesized by the reduction of metal ions during discharge, and they are individually embedded in C-matrix; this latter originates from the decomposition of cyclohexane. The results open novel ways to produce a wide spectrum of nanoalloys; they are needed for many applications, such as in catalysis, plasmonic, and energy conversion.
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10
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Wang Y, Nong W, Gong N, Salim T, Luo M, Tan TL, Hippalgaonkar K, Liu Z, Huang Y. Tuning Electronic Structure and Composition of FeNi Nanoalloys for Enhanced Oxygen Evolution Electrocatalysis via a General Synthesis Strategy. Small 2022; 18:e2203340. [PMID: 36089653 DOI: 10.1002/smll.202203340] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Developing low-cost and efficient oxygen evolution electrocatalysts is key to decarbonization. A facile, surfactant-free, and gram-level biomass-assisted fast heating and cooling synthesis method is reported for synthesizing a series of carbon-encapsulated dense and uniform FeNi nanoalloys with a single-phase face-centered-cubic solid-solution crystalline structure and an average particle size of sub-5 nm. This method also enables precise control of both size and composition. Electrochemical measurements show that among Fex Ni(1- x ) nanoalloys, Fe0.5 Ni0.5 has the best performance. Density functional theory calculations support the experimental findings and reveal that the optimally positioned d-band center of O-covered Fe0.5 Ni0.5 renders a half-filled antibonding state, resulting in moderate binding energies of key reaction intermediates. By increasing the total metal content from 25 to 60 wt%, the 60% Fe0.5 Ni0.5 /40% C shows an extraordinarily low overpotential of 219 mV at 10 mA cm-2 with a small Tafel slope of 23.2 mV dec-1 for the oxygen evolution reaction, which are much lower than most other FeNi-based electrocatalysts and even the state-of-the-art RuO2 . It also shows robust durability in an alkaline environment for at least 50 h. The gram-level fast heating and cooling synthesis method is extendable to a wide range of binary, ternary, quaternary nanoalloys, as well as quinary and denary high-entropy-alloy nanoparticles.
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Affiliation(s)
- Yong Wang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Wei Nong
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Na Gong
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Teddy Salim
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Mingchuan Luo
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden, 2333 CC, The Netherlands
| | - Teck Leong Tan
- Institute of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way, #16-16 Connexis, Singapore, 138632, Singapore
| | - Kedar Hippalgaonkar
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore, 138634, Singapore
| | - Zheng Liu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- School of Electrical and Electronic Engineering and The Photonics Institute, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yizhong Huang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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11
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Li L, Cheng J, Cheng Y, Han T, Liu Y, Zhou Y, Zhao G, Zhao Y, Xiong C, Dong L, Wang Q. Significant Improvements in Dielectric Constant and Energy Density of Ferroelectric Polymer Nanocomposites Enabled by Ultralow Contents of Nanofillers. Adv Mater 2021; 33:e2102392. [PMID: 34302399 DOI: 10.1002/adma.202102392] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/01/2021] [Indexed: 06/13/2023]
Abstract
Polymer dielectrics with excellent processability and high breakdown strength (Eb ) enable the development of high-energy-density capacitors. Although the improvement of dielectric constant (K) of polymer dielectric has been realized by adding high-K inorganic fillers with high contents (>10 vol%), this approach faces significant challenges in scalable film processing. Here, the incorporation of ultralow ratios (<1 vol%) of low-K Cd1- x Znx Se1- y Sy nanodots into a ferroelectric polymer is reported. The polymer composites exhibit substantial and concurrent increase in both K and Eb , yielding a discharged energy density of 26.0 J cm-3 , outperforming the current dielectric polymers and nanocomposites measured at ≤600 MV m-1 . The observed unconventional dielectric enhancement is attributed to the structural changes induced by the nanodot fillers, including transformation of polymer chain conformation and induced interfacial dipoles, which have been confirmed by density function theory calculations. The dielectric model established in this work addresses the limitations of the current volume-average models on the polymer composites with low filler contents and gives excellent agreement to the experimental results. This work provides a new experimental route to scalable high-energy-density polymer dielectrics and also advances the fundamental understanding of the dielectric behavior of polymer nanocomposites at atomistic scales.
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Affiliation(s)
- Li Li
- Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Jingsai Cheng
- Research Center for Materials Genome Engineering, International Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Yunyun Cheng
- Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Ting Han
- Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Yang Liu
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Yao Zhou
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Guanghui Zhao
- Research Center for Materials Genome Engineering, International Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Yan Zhao
- Research Center for Materials Genome Engineering, International Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Chuanxi Xiong
- Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Lijie Dong
- Center for Smart Materials and Devices, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, 430070, P. R. China
| | - Qing Wang
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
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12
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Tiburski C, Boje A, Nilsson S, Say Z, Fritzsche J, Ström H, Hellman A, Langhammer C. Light-Off in Plasmon-Mediated Photocatalysis. ACS Nano 2021; 15:11535-11542. [PMID: 34156229 PMCID: PMC8320230 DOI: 10.1021/acsnano.1c01537] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 06/15/2021] [Indexed: 05/30/2023]
Abstract
In plasmon-mediated photocatalysis it is of critical importance to differentiate light-induced catalytic reaction rate enhancement channels, which include near-field effects, direct hot carrier injection, and photothermal catalyst heating. In particular, the discrimination of photothermal and hot electron channels is experimentally challenging, and their role is under keen debate. Here we demonstrate using the example of CO oxidation over nanofabricated neat Pd and Au50Pd50 alloy catalysts, how photothermal rate enhancement differs by up to 3 orders of magnitude for the same photon flux, and how this effect is controlled solely by the position of catalyst operation along the light-off curve measured in the dark. This highlights that small fluctuations in reactor temperature or temperature gradients across a sample may dramatically impact global and local photothermal rate enhancement, respectively, and thus control both the balance between different rate enhancement mechanisms and the way strategies to efficiently distinguish between them should be devised.
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Affiliation(s)
- Christopher Tiburski
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Astrid Boje
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Sara Nilsson
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Zafer Say
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Joachim Fritzsche
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Henrik Ström
- Department
of Mechanics and Maritime Sciences, Chalmers
University of Technology, 412 96 Göteborg, Sweden
| | - Anders Hellman
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
| | - Christoph Langhammer
- Department
of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden
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13
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Zhang Q, Kusada K, Kitagawa H. Phase Control of Noble Monometallic and Alloy Nanomaterials by Chemical Reduction Methods. Chempluschem 2021; 86:504-519. [PMID: 33764700 DOI: 10.1002/cplu.202000782] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/15/2021] [Indexed: 12/28/2022]
Abstract
In recent years, the phase control of monometallic and alloy nanomaterials has attracted great attention because of the potential to tune the physical and chemical properties of these species. In this Review, an overview of the latest research progress in phase-controlled monometallic and alloy nanomaterials is first given. Then, the phase-controlled synthesis using a chemical reduction method are discussed, and the formation mechanisms of these nanomaterials are specifically highlighted. Lastly, the challenges and future perspectives in this new research field are discussed.
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Affiliation(s)
- Quan Zhang
- Department of Chemistry, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Kohei Kusada
- Department of Chemistry, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Hiroshi Kitagawa
- Department of Chemistry, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan
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14
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Front A, Mottet C. Stress effect on segregation and ordering in Pt-Ag nanoalloys. J Phys Condens Matter 2021; 33:154006. [PMID: 33503601 DOI: 10.1088/1361-648x/abe07a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
We performed a theoretical study of the chemical ordering and surface segregation of Pt-Ag nanoalloys in the range of size from 976 to 9879 atoms (3.12 to 6.76 nm). We used an original many-body potential able to stabilize the L11ordered phase at equiconcentration leading to a strong silver surface segregation. Based on a recent experimental study where nanoparticles up to 2.5 nm have been characterized by high transmission electron microscopy with the L11ordered phase in the core and a silver surface shell, we predict in our model via Monte Carlo simulations that the lower energy configuration is more complicated with a three-shell alternance of Ag/Pt/Ag from the surface surrounding the L11ordered phase in the core. The stress analysis demonstrates that this structure softens the local stress distribution inside the nanoparticle which contributes to reduce the internal energy.
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Affiliation(s)
- Alexis Front
- Aix-Marseille University, CNRS, CINaM UMR 7325, Campus de Luminy, Marseille 13288, France
| | - Christine Mottet
- Aix-Marseille University, CNRS, CINaM UMR 7325, Campus de Luminy, Marseille 13288, France
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15
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Zhu J, Xu D, Ding LJ, Wang PC. CoPd Nanoalloys with Metal-Organic Framework as Template for Both N-Doped Carbon and Cobalt Precursor: Efficient and Robust Catalysts for Hydrogenation Reactions. Chemistry 2021; 27:2707-2716. [PMID: 33084099 DOI: 10.1002/chem.202003640] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Indexed: 11/07/2022]
Abstract
In this work, a series of metal-organic framework (MOF)-derived CoPd nanoalloys have been prepared. The nanocatalysts exhibited excellent activities in the hydrogenation of nitroarenes and alkenes in green solvent (ethanol/water) under mild conditions (H2 balloon, room temperature). Using ZIF-67 as template for both carbon matrix and cobalt precursor coating with a mesoporous SiO2 layer, the catalyst CoPd/NC@SiO2 was smoothly constructed. Catalytic results revealed a synergistic effect between Co and Pd components in the hydrogenation process due to the enhanced electron density. The mesoporous SiO2 shell effectively prevented the sintering of hollow carbon and metal NPs at high temperature, furnishing the well-dispersed nanoalloy catalysts and better catalytic performance. Moreover, the catalyst was durable and showed negligible activity decay in recycling and scale-up experiments, providing a mild and highly efficient way to access amines and arenes.
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Affiliation(s)
- Jie Zhu
- School of Chemical Engineering, Nanjing University of, Science & Technology, Nanjing, 210094, P.R. China.,College of Sciences, Nanjing Agricultural University, Nanjing, 210095, P.R. China
| | - Deng Xu
- School of Chemical Engineering, Nanjing University of, Science & Technology, Nanjing, 210094, P.R. China
| | - Lu-Jia Ding
- School of Chemical Engineering, Nanjing University of, Science & Technology, Nanjing, 210094, P.R. China
| | - Peng-Cheng Wang
- School of Chemical Engineering, Nanjing University of, Science & Technology, Nanjing, 210094, P.R. China
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16
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Tu K, Tranca D, Rodríguez-Hernández F, Jiang K, Huang S, Zheng Q, Chen MX, Lu C, Su Y, Chen Z, Mao H, Yang C, Jiang J, Liang HW, Zhuang X. A Novel Heterostructure Based on RuMo Nanoalloys and N-doped Carbon as an Efficient Electrocatalyst for the Hydrogen Evolution Reaction. Adv Mater 2020; 32:e2005433. [PMID: 33063406 DOI: 10.1002/adma.202005433] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Indexed: 05/27/2023]
Abstract
Heterostructures exhibit considerable potential in the field of energy conversion due to their excellent interfacial charge states in tuning the electronic properties of different components to promote catalytic activity. However, the rational preparation of heterostructures with highly active heterosurfaces remains a challenge because of the difficulty in component tuning, morphology control, and active site determination. Herein, a novel heterostructure based on a combination of RuMo nanoalloys and hexagonal N-doped carbon nanosheets is designed and synthesized. In this protocol, metal-containing anions and layered double hydroxides are employed to control the components and morphology of heterostructures, respectively. Accordingly, the as-made RuMo-nanoalloys-embedded hexagonal porous carbon nanosheets are promising for the hydrogen evolution reaction (HER), resulting in an extremely small overpotential (18 mV), an ultralow Tafel slope (25 mV dec-1 ), and a high turnover frequency (3.57 H2 s-1 ) in alkaline media, outperforming current Ru-based electrocatalysts. First-principle calculations based on typical 2D N-doped carbon/RuMo nanoalloys heterostructures demonstrate that introducing N and Mo atoms into C and Ru lattices, respectively, triggers electron accumulation/depletion regions at the heterosurface and consequently reduces the energy barrier for the HER. This work presents a convenient method for rational fabrication of carbon-metal heterostructures for highly efficient electrocatalysis.
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Affiliation(s)
- Kejun Tu
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Diana Tranca
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | | | - Kaiyue Jiang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Senhe Huang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Qi Zheng
- School of Materials Science and Engineering, Southeast University, 2 Dongnan University RD., Nanjing, Jiangsu, 211189, China
| | - Ming-Xi Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, 96 Jintai RD., Hefei, Anhui, 230026, China
| | - Chenbao Lu
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Yuezeng Su
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Zhenying Chen
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan, 450001, China
| | - Haiyan Mao
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA
- College of Materials Science and Engineering, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Chongqing Yang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
| | - Jinyang Jiang
- School of Materials Science and Engineering, Southeast University, 2 Dongnan University RD., Nanjing, Jiangsu, 211189, China
| | - Hai-Wei Liang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, 96 Jintai RD., Hefei, Anhui, 230026, China
| | - Xiaodong Zhuang
- The Meso-Entropy Matter Lab, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, 800 Dongchuan RD., Shanghai, 200240, China
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17
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Ortiz de Zárate D, García-Meca C, Pinilla-Cienfuegos E, Ayúcar JA, Griol A, Bellières L, Hontañón E, Kruis FE, Martí J. Green and Sustainable Manufacture of Ultrapure Engineered Nanomaterials. Nanomaterials (Basel) 2020; 10:nano10030466. [PMID: 32150817 PMCID: PMC7153611 DOI: 10.3390/nano10030466] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 02/28/2020] [Accepted: 03/03/2020] [Indexed: 11/25/2022]
Abstract
Nanomaterials with very specific features (purity, colloidal stability, composition, size, shape, location…) are commonly requested by cutting-edge technologic applications, and hence a sustainable process for the mass-production of tunable/engineered nanomaterials would be desirable. Despite this, tuning nano-scale features when scaling-up the production of nanoparticles/nanomaterials has been considered the main technological barrier for the development of nanotechnology. Aimed at overcoming these challenging frontier, a new gas-phase reactor design providing a shorter residence time, and thus a faster quenching of nanoclusters growth, is proposed for the green, sustainable, versatile, cost-effective, and scalable manufacture of ultrapure engineered nanomaterials (ranging from nanoclusters and nanoalloys to engineered nanostructures) with a tunable degree of agglomeration, composition, size, shape, and location. This method enables: (1) more homogeneous, non-agglomerated ultrapure Au-Ag nanoalloys under 10 nm; (2) 3-nm non-agglomerated ultrapure Au nanoclusters with lower gas flow rates; (3) shape-controlled Ag NPs; and (4) stable Au and Ag engineered nanostructures: nanodisks, nanocrosses, and 3D nanopillars. In conclusion, this new approach paves the way for the green and sustainable mass-production of ultrapure engineered nanomaterials.
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Affiliation(s)
- David Ortiz de Zárate
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
- Correspondence:
| | - Carlos García-Meca
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
| | - Elena Pinilla-Cienfuegos
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
| | - José A. Ayúcar
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
| | - Amadeu Griol
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
| | - Laurent Bellières
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
| | - Esther Hontañón
- Grupo de Nanosensores y Sistemas Inteligentes (NoySI), CSIC, 28006 Madrid, Spain;
| | - Frank E. Kruis
- Institute of Nanostructures and Technology, University Duisburg-Essen, 47057 Duisburg, Germany;
| | - Javier Martí
- Valencia Nanophotonics Technology Center, Universitat Politècnica de València, 46022 València, Spain; (C.G.-M.); (E.P.-C.); (J.A.A.); (A.G.); (L.B.); (J.M.)
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18
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Zhao Z, Xu H, Feng Z, Zhang Y, Cui M, Cao D, Cheng D. Design of High-Performance Co-Based Alloy Nanocatalysts for the Oxygen Reduction Reaction. Chemistry 2019; 26:4128-4135. [PMID: 31797431 DOI: 10.1002/chem.201904431] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/25/2019] [Indexed: 12/19/2022]
Abstract
Co-based nanoalloys show potential applications as nanocatalysts for the oxygen reduction reaction (ORR), but improving their activity is still a great challenge. In this paper, a strategy is proposed to design efficient Co-M (M=Au, Ag, Pd, Pt, Ir, and Rh) nanoalloys as ORR catalysts by using density functional theory (DFT) calculations. Through the Sabatier analysis, the overpotential as a function of ΔGOH * is identified as a quantitative descriptor for analyzing the effect of dopants and atomic structures on the activity of the Co-based nanoalloys. By adopting the suitable dopants and atomic structures, ΔGOH * accompanied by overpotential could be adjusted to the optimal range to enhance the activity of the Co-based nanoalloys. With this strategy, the core-shell structured Ag42 Co13 nanoalloy is predicted to have the highest catalytic activity for ORR among these Co-based nanoalloys. To give a deeper insight into the properties of Ag-Co nanoalloys, the structure, thermal stability, and reaction mechanism of Ag-Co nanoalloys with different compositions are also studied by using molecular simulations and DFT calculations. It is found that core-shell Ag42 Co13 exhibits the highest structural and thermal stability among these Ag-Co nanoalloys. In addition, the core-shell Ag42 Co13 shows the lowest ORR reaction energy barriers among these Ag-Co nanoalloys. It is expected that this kind of strategy could provide a viable way to design highly efficient heterogeneous catalysts in extensive applications.
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Affiliation(s)
- Zheng Zhao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Haoxiang Xu
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Zongyu Feng
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Yongqi Zhang
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Meisheng Cui
- GRINM Group Corporation Limited, Beijing, 100088, P. R. China.,Grirem Advanced Materials Co., Ltd., Beijing, 100088, P. R. China.,Hebei Province Rare Earth Functional Materials Manufacturing, Innovation Center, Xiongan, 071700, P. R. China
| | - Dapeng Cao
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
| | - Daojian Cheng
- State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing, 100029, P. R. China
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19
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Abstract
We have developed an algorithm to automatically build the global minimum and other low-energy minima of nanoclusters. This method is implemented in PyAR (https://github.com/anooplab/pyar) program. The global optimization in PyAR involves two parts, generation of several trial geometries and gradient-based local optimization of the trial geometries. While generating the trial geometries, a Tabu list is used for storing the information of the already used trial geometries to avoid using the similar trial geometries. In this recursive algorithm, an n-sized cluster is built from the geometries of n−1 clusters. The overall procedure automatically generates many unique minimum energy geometries of clusters with size from 2 up to n using this evolutionary growth strategy. We have used our strategy on some of the well-studied clusters such as Pd, Pt, Au, and Al homometallic clusters, Ru-Pt and Au-Pt binary clusters, and Ag-Au-Pt ternary cluster. We have analyzed some of the popular parameters to characterize the clusters, such as relative energy, singlet-triplet energy difference, binding energy, second-order energy difference, and mixing energy, and compared with the reported properties.
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Affiliation(s)
- Maya Khatun
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | | | - Anakuthil Anoop
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
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20
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Kim C, Dionigi F, Beermann V, Wang X, Möller T, Strasser P. Alloy Nanocatalysts for the Electrochemical Oxygen Reduction (ORR) and the Direct Electrochemical Carbon Dioxide Reduction Reaction (CO 2 RR). Adv Mater 2019; 31:e1805617. [PMID: 30570788 DOI: 10.1002/adma.201805617] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/18/2018] [Indexed: 06/09/2023]
Abstract
In the face of the global energy challenge and progressing global climate change, renewable energy systems and components, such as fuel cells and electrolyzers, which close the energetic oxygen and carbon cycles, have become a technology development priority. The electrochemical oxygen reduction reaction (ORR) and the direct electrochemical carbon dioxide reduction reaction (CO2 RR) are important electrocatalytic processes that proceed at gas diffusion electrodes of hydrogen fuel cells and CO2 electrolyzers, respectively. However, their low catalytic activity (voltage efficiency), limited long-term stability, and moderate product selectivity (related to their Faradaic efficiency) have remained challenges. To address these, suitable catalysts are required. This review addresses the current state of research on Pt-based and Cu-based nanoalloy electrocatalysts for ORR and CO2 RR, respectively, and critically compares and contrasts key performance parameters such as activity, selectivity, and durability. In particular, Pt nanoparticles alloyed with transition metals, post-transition metals and lanthanides, are discussed, as well as the material characterization and their performance for the ORR. Then, bimetallic Cu nanoalloy catalysts are reviewed and organized according to their main reaction product generated by the second metal. This review concludes with a perspective on nanoalloy catalysts for the ORR and the CO2 RR, and proposes future research directions.
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Affiliation(s)
- Cheonghee Kim
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Fabio Dionigi
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Vera Beermann
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Xingli Wang
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Tim Möller
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
| | - Peter Strasser
- Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623, Berlin, Germany
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21
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Abstract
Site heterogeneity of metal nanocatalysts poses grand challenges for catalyst design from first principles. To accelerate catalyst discovery, it is of pivotal importance to develop an approach that efficiently maps catalytic activity of nanoparticles onto geometry-based descriptors while considering the geometric strain and metal ligand of an active site. We demonstrate that there exist linear correlations between orbitalwise coordination numbers CNα and free formation energies of oxygen species (e.g., *OH and *OOH) at Pt sites. Kinetic analysis along with herein developed structure-activity relationships accurately predicts the activity trend of pure Pt nanoparticles (∼1-7 nm) toward oxygen reduction. Application of the approach to a search of Pt nanoalloys leads to several Pt monolayer core-shell nanostructures with enhanced oxygen reduction activity and reduced cost. The approach presented here facilitates a transition from traditional single-crystal models to nanoparticles in theory-guided catalyst discovery.
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Affiliation(s)
- Siwen Wang
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Noushin Omidvar
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Emily Marx
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
| | - Hongliang Xin
- Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
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22
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Abstract
Nanoalloys (NAs), which are distinctly different from bulk alloys or single metals, take on intrinsic features including tunable components and ratios, variable constructions, reconfigurable electronic structures, and optimizable performances, which endow NAs with fascinating prospects in the catalysis field. Here, the focus is on NA materials for chemical catalysis (except photocatalysis or electrocatalysis). In terms of composition, NA systems are divided into three groups, noble metal, base metal, and noble/base metal mixed NAs. Their design and fabrication for the optimization of catalytic performance are systematically summarized. Additionally, the correlations between the composition/structure and catalytic properties are also mentioned. Lastly, the challenges faced in current research are discussed, and further pathways toward their development are suggested.
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Affiliation(s)
- Hao Fang
- School of Chemical Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Jinhu Yang
- School of Chemical Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Ming Wen
- School of Chemical Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Qingsheng Wu
- School of Chemical Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
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23
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Cai R, Ellis PR, Yin J, Liu J, Brown CM, Griffin R, Chang G, Yang D, Ren J, Cooke K, Bishop PT, Theis W, Palmer RE. Performance of Preformed Au/Cu Nanoclusters Deposited on MgO Powders in the Catalytic Reduction of 4-Nitrophenol in Solution. Small 2018; 14:e1703734. [PMID: 29412512 DOI: 10.1002/smll.201703734] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 12/26/2017] [Indexed: 05/27/2023]
Abstract
The deposition of preformed nanocluster beams onto suitable supports represents a new paradigm for the precise preparation of heterogeneous catalysts. The performance of the new materials must be validated in model catalytic reactions. It is shown that gold/copper (Au/Cu) nanoalloy clusters (nanoparticles) of variable composition, created by sputtering and gas phase condensation before deposition onto magnesium oxide powders, are highly active for the catalytic reduction of 4-nitrophenol in solution at room temperature. Au/Cu bimetallic clusters offer decreased catalyst cost compared with pure Au and the prospect of beneficial synergistic effects. Energy-dispersive X-ray spectroscopy coupled with aberration-corrected scanning transmission electron microscopy imaging confirms that the Au/Cu bimetallic clusters have an alloy structure with Au and Cu atoms randomly located. Reaction rate analysis shows that catalysts with approximately equal amounts of Au and Cu are much more active than Au-rich or Cu-rich clusters. Thus, the interplay between the Au and Cu atoms at the cluster surface appears to enhance the catalytic activity substantially, consistent with model density functional theory calculations of molecular binding energies. Moreover, the physically deposited clusters with Au/Cu ratio close to 1 show a 25-fold higher activity than an Au/Cu reference sample made by chemical impregnation.
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Affiliation(s)
- Rongsheng Cai
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
- College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, SA1 8EN, UK
| | - Peter R Ellis
- Johnson Matthey, Blount's Court, Sonning Common, Reading, RG4 9NH, UK
| | - Jinlong Yin
- Teer Coatings Ltd., Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9AS, UK
| | - Jian Liu
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
| | | | - Ross Griffin
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
| | - Guojing Chang
- Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Dongjiang Yang
- Collaborative Innovation Center for Marine Biomass Fibers Materials and Textiles of Shandong Province, School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, P. R. China
| | - Jun Ren
- School of Chemical and Environmental Engineering, North University of China, Taiyuan, 030051, P. R. China
| | - Kevin Cooke
- Teer Coatings Ltd., Berry Hill Industrial Estate, Droitwich, Worcestershire, WR9 9AS, UK
| | - Peter T Bishop
- Johnson Matthey, Blount's Court, Sonning Common, Reading, RG4 9NH, UK
| | - Wolfgang Theis
- Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Birmingham, B15 2TT, UK
| | - Richard E Palmer
- College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, SA1 8EN, UK
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24
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Zhang C, Liu Y, Chang Y, Lu Y, Zhao S, Xu D, Dai Z, Han M, Bao J. Component-Controlled Synthesis of Necklace-Like Hollow Ni XRu y Nanoalloys as Electrocatalysts for Hydrogen Evolution Reaction. ACS Appl Mater Interfaces 2017; 9:17326-17336. [PMID: 28481106 DOI: 10.1021/acsami.7b01114] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Developing highly efficient and long-durable nanoalloy electrocatalysts toward the hydrogen evolution reaction (HER) are highly desirable for implementation of the water-splitting technique to prepare clean fuels. Though great progress has been achieved, controllable synthesis of hollow NixRuy nanoalloys with a wide component ratio range remains a challenge and their applications for HER have not been explored. Here, a series of necklace-like hollow NixRuy nanoalloys (Ni72Ru28, Ni63Ru37, Ni43Ru57, and Ni29Ru71) are prepared using the galvanic replacement reaction between the Ni nanochains and RuCl3·3H2O and the hollowing process based on the Kirkendall effect. Electrochemical tests reveal that those NixRuy nanoalloys can efficiently catalyze HER in acidic media. Among them, the Ni43Ru57 nanoalloy exhibits the highest catalytic activity with an overpotential of 41 mV to attain a current density of -10 mA cm-2, outperforming other NixRuy nanoalloys and close to commercial Pt/C. Additionally, its current density will exceed Pt/C catalyst as the overpotential surpasses 102 mV. Moreover, such Ni43Ru57 nanoalloy also shows an exceptional durability that can continuously work for 8 h only with a little loss of activity. Deduced from some featured spectroscopic and electrochemical analysis, the excellent catalytic performance of Ni43Ru57 nanoalloy is attributed to the proper component ratio and effective electronic coupling of Ni and Ru, causing the faster interfacial electron transfer kinetics and more available active sites on it compared with other NixRuy nanoalloy ones.
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Affiliation(s)
- Caihua Zhang
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
- College of Science, Nanjing Forestry University , Nanjing 210037, People's Republic of China
| | - Ying Liu
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Yingxue Chang
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Yanan Lu
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Shulin Zhao
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Dongdong Xu
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Zhihui Dai
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
| | - Min Han
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, People's Republic of China
| | - Jianchun Bao
- Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University , Nanjing 210023, People's Republic of China
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25
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Cheng YH, Zhang Y, Chau SL, Lai SKM, Tang HW, Ng KM. Enhancement of Image Contrast, Stability, and SALDI-MS Detection Sensitivity for Latent Fingerprint Analysis by Tuning the Composition of Silver-Gold Nanoalloys. ACS Appl Mater Interfaces 2016; 8:29668-29675. [PMID: 27750015 DOI: 10.1021/acsami.6b09668] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Metal alloy nanoparticles (NPs) offer a new combination of unique physicochemical properties based on their pure counterparts, which can facilitate the development of novel analytical methods. Here, we demonstrated that Ag-Au alloy NPs could be utilized for optical and mass spectrometric imaging of latent fingerprints (LFPs) with improved image contrast, stability, and detection sensitivity. Upon deposition of Ag-Au alloy NPs (Ag:Au = 60:40 wt %), ridge regions of the LFP became amber colored, while the groove regions appeared purple-blue. The presence of Au in the Ag-Au alloy NPs suppressed aggregation behavior compared to pure AgNPs, thus improving the stability of the developed LFP images. In addition, the Ag component in the Ag-Au alloy NPs enhanced optical absorption efficiency compared to pure AuNPs, resulting in higher contrast LFP images. Moreover, varying the Ag-Au ratio could enable the tuning of the resulting surface plasmonic resonance absorption and hence affect image contrast. Furthermore, the Ag-Au alloy NPs assisted the surface-assisted laser desorption/ionization MS analysis of chemical and biochemical compounds in LFPs, with better detection sensitivity than either pure AgNPs or AuNPs.
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Affiliation(s)
- Yu-Hong Cheng
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Yue Zhang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Siu-Leung Chau
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Samuel Kin-Man Lai
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Ho-Wai Tang
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
| | - Kwan-Ming Ng
- Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong SAR, People's Republic of China
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26
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Carenco S, Wu CH, Shavorskiy A, Alayoglu S, Somorjai GA, Bluhm H, Salmeron M. Synthesis and Structural Evolution of Nickel-Cobalt Nanoparticles Under H2 and CO2. Small 2015; 11:3045-3053. [PMID: 25727527 DOI: 10.1002/smll.201402795] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 11/18/2014] [Indexed: 06/04/2023]
Abstract
Bimetallic nanoparticle (NP) catalysts are interesting for the development of selective catalysts in reactions such as the reduction of CO2 by H2 to form hydrocarbons. Here the synthesis of Ni-Co NPs is studied, and the morphological and structural changes resulting from their activation (via oxidation/reduction cycles), and from their operation under reaction conditions, are presented. Using ambient-pressure X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and transmission electron microscopy, it is found that the initial core-shell structure evolves to form a surface alloy due to nickel migration from the core. Interestingly, the core consists of a Ni-rich single crystal and a void with sharp interfaces. Residual phosphorous species, coming from the ligands used for synthesis, are found initially concentrated in the NP core, which later diffuse to the surface.
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Affiliation(s)
- Sophie Carenco
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Cheng-Hao Wu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Andrey Shavorskiy
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Selim Alayoglu
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Gabor A Somorjai
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Chemistry, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Hendrik Bluhm
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Miquel Salmeron
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Materials Sciences and Engineering, University of California Berkeley, Berkeley, CA, 94720, USA
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27
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Ristig S, Chernousova S, Meyer-Zaika W, Epple M. Synthesis, characterization and in vitro effects of 7 nm alloyed silver-gold nanoparticles. Beilstein J Nanotechnol 2015; 6:1212-1220. [PMID: 26171298 PMCID: PMC4464341 DOI: 10.3762/bjnano.6.124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/08/2015] [Indexed: 05/30/2023]
Abstract
Alloyed silver-gold nanoparticles were prepared in nine different metal compositions with silver/gold molar ratios of ranging from 90:10 to 10:90. The one-pot synthesis in aqueous medium can easily be modified to gain control over the final particle diameter and the stabilizing agents. The purification of the particles to remove synthesis by-products (which is an important factor for subsequent in vitro experiments) was carried out by multiple ultracentrifugation steps. Characterization by transmission electron microscopy (TEM), differential centrifugal sedimentation (DCS), dynamic light scattering (DLS), UV-vis spectroscopy and atomic absorption spectroscopy (AAS) showed spherical, monodisperse, colloidally stable silver-gold nanoparticles of ≈7 nm diameter with measured molar metal compositions very close to the theoretical values. The examination of the nanoparticle cytotoxicity towards HeLa cells and human mesenchymal stem cells (hMSCs) showed that the toxicity is not proportional to the silver content. Nanoparticles with a silver/gold molar composition of 80:20 showed the highest toxicity.
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Affiliation(s)
- Simon Ristig
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Svitlana Chernousova
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Wolfgang Meyer-Zaika
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
| | - Matthias Epple
- Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, 45117 Essen, Germany
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28
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Khanal S, Spitale A, Bhattarai N, Bahena D, Velazquez-Salazar JJ, Mejía-Rosales S, M. Mariscal M, José-Yacaman M. Synthesis, characterization, and growth simulations of Cu-Pt bimetallic nanoclusters. Beilstein J Nanotechnol 2014; 5:1371-1379. [PMID: 25247120 PMCID: PMC4168864 DOI: 10.3762/bjnano.5.150] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 08/06/2014] [Indexed: 06/03/2023]
Abstract
Highly monodispersed Cu-Pt bimetallic nanoclusters were synthesized by a facile synthesis approach. Analysis of transmission electron microscopy (TEM) and spherical aberration (C s)-corrected scanning transmission electron microscopy (STEM) images shows that the average diameter of the Cu-Pt nanoclusters is 3.0 ± 1.0 nm. The high angle annular dark field (HAADF-STEM) images, intensity profiles, and energy dispersive X-ray spectroscopy (EDX) line scans, allowed us to study the distribution of Cu and Pt with atomistic resolution, finding that Pt is embedded randomly in the Cu lattice. A novel simulation method is applied to study the growth mechanism, which shows the formation of alloy structures in good agreement with the experimental evidence. The findings give insight into the formation mechanism of the nanosized Cu-Pt bimetallic catalysts.
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Affiliation(s)
- Subarna Khanal
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249, San Antonio, Texas, USA
| | - Ana Spitale
- INFIQC, CONICET, Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, (XUA5000) Córdoba, Argentina
| | - Nabraj Bhattarai
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249, San Antonio, Texas, USA
| | - Daniel Bahena
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249, San Antonio, Texas, USA
| | - J Jesus Velazquez-Salazar
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249, San Antonio, Texas, USA
| | - Sergio Mejía-Rosales
- Center for Innovation and Research in Engineering and Technology, and CICFIM-Facultad de Ciencias Físico-Matemáticas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL 66450, México
| | - Marcelo M. Mariscal
- INFIQC, CONICET, Departamento de Matemática y Física, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, (XUA5000) Córdoba, Argentina
| | - Miguel José-Yacaman
- Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, 78249, San Antonio, Texas, USA
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29
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De Clercq A, Dachraoui W, Margeat O, Pelzer K, Henry CR, Giorgio S. Growth of Pt-Pd Nanoparticles Studied In Situ by HRTEM in a Liquid Cell. J Phys Chem Lett 2014; 5:2126-30. [PMID: 26270503 DOI: 10.1021/jz500690a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The growth of Pt-Pd nanoparticles from organometallic precursors is studied in situ in real time by HRTEM in a graphene oxide liquid cell. The reduction of the metal precursors is induced by the electron beam. During the growth, the particles rearrange their internal structure to form faceted single crystals. The growth is compatible with the Lifshitz-Slyozov-Wagner (LSW) mechanism in the limiting case of a reaction-limited process. The same particles are also synthesized ex situ by using a chemical reducing agent and observed in HRTEM.
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Affiliation(s)
- Astrid De Clercq
- †Aix Marseille Université, CNRS, CINaM UMR 7325, 13288 Marseille, France
- ‡Aix Marseille Université, CNRS, MADIREL UMR 7246, 13397 Marseille, France
| | - Walid Dachraoui
- †Aix Marseille Université, CNRS, CINaM UMR 7325, 13288 Marseille, France
| | - Olivier Margeat
- †Aix Marseille Université, CNRS, CINaM UMR 7325, 13288 Marseille, France
| | - Katrin Pelzer
- ‡Aix Marseille Université, CNRS, MADIREL UMR 7246, 13397 Marseille, France
| | - Claude R Henry
- †Aix Marseille Université, CNRS, CINaM UMR 7325, 13288 Marseille, France
| | - Suzanne Giorgio
- †Aix Marseille Université, CNRS, CINaM UMR 7325, 13288 Marseille, France
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