1
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Gao Y, Zhu B. Simulating Structural Dynamics of Metal Catalysts under Operative Conditions. J Phys Chem Lett 2024; 15:8351-8359. [PMID: 39110671 DOI: 10.1021/acs.jpclett.4c01907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2024]
Abstract
Structural reconstructions of metal catalysts have been recognized as common phenomena during catalytic reactions, which play a key role in their activities in heterogeneous catalysis. Precisely identifying the structures under the operative conditions becomes a prerequisite to establish a reliable structure-activity relationship and further rationalize the design of metal catalysts. However, real-time capture of the structural variations of catalysts at the atomic level with high-temporal resolution is a grand challenge for present in situ characterizations. During the past decade, significant progress has been made in theory to couple the structures with the reaction conditions to reproduce the experimental observations and predict the adsorbate-induced changes of catalysts in composition, morphology, size, etc. Modeling the dynamic correlation between the structure and activity of the metal catalysts brings us advanced knowledge of heterogeneous catalysis and becomes indispensable for accurate evaluation of the performance of metal catalysts.
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Affiliation(s)
- Yi Gao
- Photon Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
| | - Beien Zhu
- Photon Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
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2
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Lee S, Gadelrab K, Cheng L, Braaten JP, Wu H, Ross FM. Simultaneous 2D Projection and 3D Topographic Imaging of Gas-Dependent Dynamics of Catalytic Nanoparticles. ACS NANO 2024. [PMID: 39101356 DOI: 10.1021/acsnano.4c04903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Catalyst deactivation through pathways such as sintering of nanoparticles and degradation of the support is a critical factor when designing high-performance catalysts. Here, structural changes of supported nanoparticle catalysts are investigated in controlled gas environments (O2, H2O, and H2) at different temperatures by imaging simultaneously the nanoparticle structures in 2D projection and the 3D surface-sensitive topography. Platinum nanoparticles on carbon support as a model system are imaged in an environmental transmission electron microscope (ETEM), with concurrent acquisition of high-angle annular dark field scanning TEM (HAADF-STEM) and secondary electron (SE) images. Particle migration and coalescence occurs and shows gas-dependent kinetics, with nanoparticles moving across and through the support during and after coalescence. The temperature required for motion is lower in O2 than in H2O and H2, explained through the nature of the gas/nanoparticle interactions. In O2 and H2, the carbon support degrades by trench formation along migration pathways, and the particles move continuously, indicating a chemical reaction between gas and support. In H2O gas, motion is more discontinuous and oriented particle attachment occurs, as expected from theoretical predictions. These results suggest that multimodal imaging in ETEM that combines HAADF-STEM and SE data provides comprehensive information regarding catalyst dynamics and degradation mechanisms.
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Affiliation(s)
- Serin Lee
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Karim Gadelrab
- Robert Bosch LLC, Watertown, Massachusetts 02472, United States
| | - Lei Cheng
- Bosch Research Center and Technology Center North America, Sunnyvale, California 94085, United States
| | - Jonathan P Braaten
- Bosch Research Center and Technology Center North America, Sunnyvale, California 94085, United States
| | - Hanglong Wu
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Frances M Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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3
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Li XY, Ou P, Duan X, Ying L, Meng J, Zhu B, Gao Y. Dynamic Active Sites In Situ Formed in Metal Nanoparticle Reshaping under Reaction Conditions. JACS AU 2024; 4:1892-1900. [PMID: 38818067 PMCID: PMC11134379 DOI: 10.1021/jacsau.4c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 06/01/2024]
Abstract
Understanding the nonequilibrium transformation of nanocatalysts under reaction conditions is important because metastable atomic structures may be created during the process, which offers unique activities in reactions. Although reshaping of metal nanoparticles (NPs) under reaction conditions has been widely recognized, the dynamic reshaping process has been less studied at the atomic scale. Here, we develop an atomistic kinetic Monte Carlo model to simulate the complete reshaping process of Pt nanoparticles in a CO environment and reveal the in situ formation of atomic clusters on the NP surface, a new type of active site beyond conventional understanding, boosting the reactivities in the CO oxidation reaction. Interestingly, highly active peninsula and inactive island clusters both form on the (111) facets and interchange in varying states of dynamic equilibrium, which influences the catalytic activities significantly. This study provides new fundamental knowledge of nanocatalysis and new guidance for the rational design of nanocatalysts.
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Affiliation(s)
- Xiao-Yan Li
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Pengfei Ou
- Department
of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Xinyi Duan
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Lei Ying
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jun Meng
- Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Beien Zhu
- Photon
Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Yi Gao
- Photon
Science Research Center for Carbon Dioxide, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key
Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy
of Sciences, Shanghai 201210, China
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4
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Gu J, Yang S, Liu JZ, Zhang L. Unravelling the atomistic mechanisms underpinning the morphological evolution of Al-alloyed hematite. NANOSCALE 2024; 16:5976-5987. [PMID: 38376499 DOI: 10.1039/d3nr05765h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Hydrothermal synthesis based upon the use of Al3+ as the dopant and/or ethanol as the solvent is effective in promoting the growth of hematite into nanoplates rich in the (001) surface, which is highly active for a broad range of catalytic applications. However, the underpinning mechanism for the flattening of hematite crystals is still poorly comprehended. To close this knowledge gap, in this work, we have attempted intensive computational modelling to construct a binary phase diagram for Fe2O3-Al2O3 under typical hydrothermal conditions, as well as to quantify the surface energy of hematite crystal upon coverage with Al3+ and ethanol molecules. An innovative coupling of density functional theory calculation, cluster expansion and Monte Carlo simulations in analogy to machine learning and prediction was attempted. Upon successful validation by experimental observation, our simulation results suggest an optimum atomic dispersion of Al3+ within hematite in cases when its concentration is below 4 at% otherwise phase separation occurs, and discrete Al2O3 nano-clusters can be preferentially formed. Computations also revealed that the adsorption of ethanol molecules alone can reduce the specific surface energy of the hematite (001) surface from 1.33 to 0.31 J m-2. The segregation of Al3+ on the (001) surface can further reduce the specific surface energy to 0.18 J m-2. Consequently, the (001) surface growth is inhibited, and it becomes dominant after the disappearance of other surfaces upon their continual growth. This work provides atomistic insights into the synergistic effect between the aluminium textural promoter and the ethanol capping agent in determining the morphology of hematite nanoparticles. The established computation approach also applies to other oxide-based catalysts in controlling their surface growth and morphology, which are critical for their catalytic applications.
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Affiliation(s)
- Jinxing Gu
- Department of Chemical and Biological Engineering, Monash University, Victoria, 3800, Australia.
| | - Sasha Yang
- Department of Chemical and Biological Engineering, Monash University, Victoria, 3800, Australia.
| | - Jefferson Zhe Liu
- Department of Mechanical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Victoria, 3010, Australia.
| | - Lian Zhang
- Department of Chemical and Biological Engineering, Monash University, Victoria, 3800, Australia.
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5
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Rajan A, Pushkar AP, Dharmalingam BC, Varghese JJ. Iterative multiscale and multi-physics computations for operando catalyst nanostructure elucidation and kinetic modeling. iScience 2023; 26:107029. [PMID: 37360694 PMCID: PMC10285649 DOI: 10.1016/j.isci.2023.107029] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023] Open
Abstract
Modern heterogeneous catalysis has benefitted immensely from computational predictions of catalyst structure and its evolution under reaction conditions, first-principles mechanistic investigations, and detailed kinetic modeling, which are rungs on a multiscale workflow. Establishing connections across these rungs and integration with experiments have been challenging. Here, operando catalyst structure prediction techniques using density functional theory simulations and ab initio thermodynamics calculations, molecular dynamics, and machine learning techniques are presented. Surface structure characterization by computational spectroscopic and machine learning techniques is then discussed. Hierarchical approaches in kinetic parameter estimation involving semi-empirical, data-driven, and first-principles calculations and detailed kinetic modeling via mean-field microkinetic modeling and kinetic Monte Carlo simulations are discussed along with methods and the need for uncertainty quantification. With these as the background, this article proposes a bottom-up hierarchical and closed loop modeling framework incorporating consistency checks and iterative refinements at each level and across levels.
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Affiliation(s)
- Ajin Rajan
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Anoop P. Pushkar
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Balaji C. Dharmalingam
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
| | - Jithin John Varghese
- Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036, India
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6
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Single Metal Atoms Embedded in the Surface of Pt Nanocatalysts: The Effect of Temperature and Hydrogen Pressure. Catalysts 2022. [DOI: 10.3390/catal12121669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Embedding energetically stable single metal atoms in the surface of Pt nanocatalysts exposed to varied temperature (T) and hydrogen pressure (P) could open up new possibilities in selective and dynamical engineering of alloyed Pt catalysts, particularly interesting for hydrogenation reactions. In this work, an environmental segregation energy model is developed to predict the stability and the surface composition evolution of 24 Metal M-promoted Pt surfaces (with M: Cu, Ag, Au, Ni, Pd, Co, Rh and Ir) under varied T and P. Counterintuitive to expectations, the results show that the more reactive alloy component (i.e., the one forming the strongest chemical bond with the hydrogen) is not the one that segregates to the surface. Moreover, using DFT-based Multi-Scaled Reconstruction (MSR) method and by extrapolation of M-promoted Pt nanoparticles (NPs), the shape dynamics of M-Pt are investigated under the same ranges of T and P. The results show that under low hydrogen pressure and high temperature ranges, Ag and Au—single atoms (and Cu to a less extent) are energetically stable on the surface of truncated octahedral and/or cuboctahedral shaped NPs. This indicated that coinage single-atoms might be used to tune the catalytic properties of Pt surface under hydrogen media. In contrast, bulk stability within wide range of temperature and pressure is predicted for all other M-single atoms, which might act as bulk promoters. This work provides insightful guides and understandings of M-promoted Pt NPs by predicting both the evolution of the shape and the surface compositions under reaction gas condition.
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7
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Duan X, Li XY, Zhu B, Gao Y. Identifying the morphology of Pt nanoparticles for the optimal catalytic activity towards CO oxidation. NANOSCALE 2022; 14:17754-17760. [PMID: 36422007 DOI: 10.1039/d2nr04929e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The morphology of nanoparticles (NPs) is crucial for determining their catalytic performance. The dramatic changes in the morphology of metal NPs during reactions observed in many in situ experiments pose great challenges for the identification of the geometry for optimal catalytic activities, which arouses the controversial understanding of the reaction mechanism. In this work, taking CO oxidation as a model reaction, we coupled a multiscale structure reconstruction model with kinetic Monte Carlo simulations to study the catalytic performance of the Pt NPs with changing morphology and reaction conditions. Through the quantitative analysis of contour plots for turnover frequencies, we show that the NPs with more well-coordinated sites exhibit optimal activity under CO-rich conditions at higher temperatures, while the reactivity of NPs with more low-coordination sites is optimal under O2-rich conditions at lower temperatures. Further analysis indicates that the competitive adsorption of CO and O2 plays the key role, in which the structure with optimal activity has a closer CO and O coverage. This work not only reconciles the controversy of the active geometry in the experiments, but offers an efficient method to guide the rational design of high-performance catalysts.
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Affiliation(s)
- Xinyi Duan
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Yan Li
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
| | - Beien Zhu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
- Interdisciplinary Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences
| | - Yi Gao
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
- Interdisciplinary Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences
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8
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Zhao Y, Zhang Q, Ma J, Yi R, Gou L, Nie D, Han X, Zhang L, Wang Y, Xu X, Wang Z, Chen L, Lu Y, Zhang S, Zhang L. Directional growth of quasi-2D Cu2O monocrystals on rGO membranes in aqueous environments. iScience 2022; 25:105472. [DOI: 10.1016/j.isci.2022.105472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/19/2022] [Accepted: 10/28/2022] [Indexed: 11/16/2022] Open
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9
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Wu Z, Li Z, Li Y, Zhang Y, Li J. Improving the DFT computational accuracy for CO activation on Fe surfaces by Bayesian error estimation functional with van der Waals correlation. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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10
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Han Y, Li XY, Zhu B, Gao Y. Unveiling the Au Surface Reconstruction in a CO Environment by Surface Dynamics and Ab Initio Thermodynamics. J Phys Chem A 2022; 126:6538-6547. [PMID: 36099447 DOI: 10.1021/acs.jpca.2c03124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Surface reconstruction changes the atomic configuration of the metal surface and thus alters its intrinsic physical and chemical properties. Recent in situ experiments have shown a variety of surface reconstructions under reaction conditions, but how to effectively predict and characterize these structures remains challenging. Herein, we combine a DFT-based kinetic Monte Carlo simulation method and ab initio thermodynamics to explore the low-energy configurations of metal surface reconstructions, which takes the surface dynamics under the reactive environment into account. We systematically simulate 13 Au surfaces ((100), (110), (111), (210), (211), (221), (310), (311), (320), (321), (322), (331), and (332)) in the CO environment and identify 19 candidate reconstruction patterns driven by CO adsorption. The breakup of the original surfaces is attributed to the lateral interactions among the nearest-neighboring adsorbates. This work provides an efficient approach to unveil the reconstructed metal surface structures in reactive environments for guiding the experiments.
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Affiliation(s)
- Yu Han
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao-Yan Li
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Beien Zhu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Interdisciplinary Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Yi Gao
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.,Interdisciplinary Research Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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11
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Wang P, Tong F, Luo J, Li Z, Wei J, Liu Y. Fucoidan-Mediated Anisotropic Calcium Carbonate Nanorods of pH-Responsive Drug Release for Antitumor Therapy. Front Bioeng Biotechnol 2022; 10:845821. [PMID: 35497329 PMCID: PMC9043484 DOI: 10.3389/fbioe.2022.845821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 03/18/2022] [Indexed: 11/13/2022] Open
Abstract
The shape of nanoparticles can determine their physical properties and then greatly impact the physiological reactions on cells or tissues during treatment. Traditionally spherical nanoparticles are more widely applied in biomedicine but are not necessarily the best. The superiority of anisotropic nanoparticles has been realized in recent years. The synthesis of the distinct-shaped metal/metal oxide nanoparticles is easily controlled. However, their biotoxicity is still up for debate. Hence, we designed CaCO3 nanorods for drug delivery prepared at mild condition by polysaccharide-regulated biomineralization in the presence of fucoidan with sulfate groups. The CaCO3 nanorods with a pH sensitivity–loaded antitumor drug mitoxantrone hydrochloride (MTO) showed excellent antitumor efficacy for the HeLa cells and MCF-7 cells in vitro. We believe that anisotropic nanoparticles will bring forth an emblematic shift in nanotechnology for application in biomedicine.
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Affiliation(s)
- Pei Wang
- School of Stomatology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang, China
- Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, China
| | - Fei Tong
- School of Stomatology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang, China
- Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, China
| | - Jun Luo
- School of Stomatology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang, China
- Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, China
| | - Zhihua Li
- School of Stomatology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang, China
- Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, China
| | - Junchao Wei
- School of Stomatology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Oral Biomedicine, Nanchang, China
- Jiangxi Province Clinical Research Center for Oral Diseases, Nanchang, China
- *Correspondence: Junchao Wei, ; Yuangang Liu,
| | - Yuangang Liu
- Institute of Pharmaceutical Engineering, Huaqiao University, Xiamen, China
- *Correspondence: Junchao Wei, ; Yuangang Liu,
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12
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Realistic Modelling of Dynamics at Nanostructured Interfaces Relevant to Heterogeneous Catalysis. Catalysts 2022. [DOI: 10.3390/catal12010052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The focus of this short review is directed towards investigations of the dynamics of nanostructured metallic heterogeneous catalysts and the evolution of interfaces during reaction—namely, the metal–gas, metal–liquid, and metal–support interfaces. Indeed, it is of considerable interest to know how a metal catalyst surface responds to gas or liquid adsorption under reaction conditions, and how its structure and catalytic properties evolve as a function of its interaction with the support. This short review aims to offer the reader a birds-eye view of state-of-the-art methods that enable more realistic simulation of dynamical phenomena at nanostructured interfaces by exploiting resource-efficient methods and/or the development of computational hardware and software.
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13
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Teng P, Gao D, Yang X, Luo M, Kong D, Gao S, Liu Z, Li Z, Wen X, Yuan L, Li K, Bowkett M, Copner N. In situ SERS detection of quinolone antibiotic residues in a water environment based on optofluidic in-fiber integrated Ag nanoparticles. APPLIED OPTICS 2021; 60:6659-6664. [PMID: 34612910 DOI: 10.1364/ao.426611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
In this paper, we present a microstructured optofluidic in-fiber Raman sensor for the detection of quinolone antibiotic residue in a water environment based on Ag surface-enhanced Raman scattering (SERS) substrate grown on the surface of the suspended core of micro-hollow optical fiber (MHF). Here, MHF has a special structure with a suspended core and a microchannel inside, which can become a natural in-fiber optofluidic device. Meanwhile, the self-assembled Ag SERS substrate can be grown on the suspended core's surface through chemical bonds, forming a microstructured optofluidic device with a Raman enhancement effect. Therefore, it can effectively detect the Raman signal of unlabeled trace quinolone antibiotic residue (ciprofloxacin and norfloxacin) inside the optical fiber. The results show that the ciprofloxacin and norfloxacin detection limits (LOD) are 10-10M and 10-11M, respectively. Compared with the maximum residue limit (3.01×10-7mol/L) stipulated by the European Union, the results are much lower, and an ideal quantitative relationship can be obtained within the detection range. Significantly, this study provides an in-fiber microstructured optofluidic Raman sensor for the label-free detection of quinolone antibiotic residue, which will have good development prospects in the field of antibiotic water pollution environmental detection.
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14
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Farkaš B, de Leeuw NH. A Perspective on Modelling Metallic Magnetic Nanoparticles in Biomedicine: From Monometals to Nanoalloys and Ligand-Protected Particles. MATERIALS (BASEL, SWITZERLAND) 2021; 14:3611. [PMID: 34203371 PMCID: PMC8269646 DOI: 10.3390/ma14133611] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 12/24/2022]
Abstract
The focus of this review is on the physical and magnetic properties that are related to the efficiency of monometallic magnetic nanoparticles used in biomedical applications, such as magnetic resonance imaging (MRI) or magnetic nanoparticle hyperthermia, and how to model these by theoretical methods, where the discussion is based on the example of cobalt nanoparticles. Different simulation systems (cluster, extended slab, and nanoparticle models) are critically appraised for their efficacy in the determination of reactivity, magnetic behaviour, and ligand-induced modifications of relevant properties. Simulations of the effects of nanoscale alloying with other metallic phases are also briefly reviewed.
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Affiliation(s)
- Barbara Farkaš
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK;
| | - Nora H. de Leeuw
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, UK;
- School of Chemistry, University of Leeds, Leeds LS2 9JT, UK
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15
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Meng J, Zhu B, Gao Y. Structure reconstruction of metal/alloy in reaction conditions: a volcano curve? Faraday Discuss 2021; 229:62-74. [PMID: 33634798 DOI: 10.1039/c9fd00128j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Recent in situ works have shown extensive evidence of the dramatic and reversible structure reconstructions of metal and alloy materials in reaction conditions. The reconstructions are of primary interest because they could lead to alternative catalytic mechanisms during real reactions. However, how the catalyst structure evolves under the pressures relevant to industrial applications (>1 atm) is so far unexplored. In our recent works, we have developed multiscale theoretical models to give reliable and precise predictions of the equilibrium shapes of metal nanoparticles and of the segregation properties of alloy surfaces at a given temperature and gas pressure. The theoretical predictions have been successfully used in interoperations of various in situ experimental observations. In this work, we applied these methods to study the detailed structural information of metal NPs and of bimetallic alloys at the temperature from 300 to 1000 K and the gas pressure from 10 to 107 Pa. The results show, in some cases, both the gas-induced shape change and the gas-induced segregation change are maximized when the gas adsorption is 'just right'. The fraction of the low-coordinated sites of the metal NP shows a volcano-like curve with pressure at a constant temperature. A similar volcano shape could also be found in the plot of the environmental segregation energy as functions of temperature and pressure. The similar gas effects at low pressure and at high pressure indicate the structural information obtained in laboratory environments (<1 atm) could be of use to understanding the catalysts structure reconstruction in industrial conditions (>1 atm).
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Affiliation(s)
- Jun Meng
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Beien Zhu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
| | - Yi Gao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China and Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.
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16
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Li R, Xu X, Zhu B, Li XY, Ning Y, Mu R, Du P, Li M, Wang H, Liang J, Chen Y, Gao Y, Yang B, Fu Q, Bao X. In situ identification of the metallic state of Ag nanoclusters in oxidative dispersion. Nat Commun 2021; 12:1406. [PMID: 33658489 PMCID: PMC7930130 DOI: 10.1038/s41467-021-21552-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
Oxidative dispersion has been widely used in regeneration of sintered metal catalysts and fabrication of single atom catalysts, which is attributed to an oxidation-induced dispersion mechanism. However, the interplay of gas-metal-support interaction in the dispersion processes, especially the gas-metal interaction has not been well illustrated. Here, we show dynamic dispersion of silver nanostructures on silicon nitride surface under reducing/oxidizing conditions and during carbon monoxide oxidation reaction. Utilizing environmental scanning (transmission) electron microscopy and near-ambient pressure photoelectron spectroscopy/photoemission electron microscopy, we unravel a new adsorption-induced dispersion mechanism in such a typical oxidative dispersion process. The strong gas-metal interaction achieved by chemisorption of oxygen on nearly-metallic silver nanoclusters is the internal driving force for dispersion. In situ observations show that the dispersed nearly-metallic silver nanoclusters are oxidized upon cooling in oxygen atmosphere, which could mislead to the understanding of oxidation-induced dispersion. We further understand the oxidative dispersion mechanism from the view of dynamic equilibrium taking temperature and gas pressure into account, which should be applied to many other metals such as gold, copper, palladium, etc. and other reaction conditions. Designing ultra small metal nanoclusters or single atoms with metallic state is a challenge. Here, the authors demonstrate the stabilization of ultra small silver clusters in the nearly-metallic state by oxygen adsorption at high temperature, using in situ spectroscopy and microscope technologies.
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Affiliation(s)
- Rongtan Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoyan Xu
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China.,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Beien Zhu
- Interdisciplinary Research Center, Shanghai Advanced Research Institute, The Chinese Academy of Sciences, Shanghai, China.,Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai, China
| | - Xiao-Yan Li
- University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai, China
| | - Yanxiao Ning
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Rentao Mu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Pengfei Du
- University of Chinese Academy of Sciences, Beijing, China.,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Mengwei Li
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Huike Wang
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China
| | - Jiajie Liang
- School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, China
| | - Yongsheng Chen
- Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin, China
| | - Yi Gao
- Interdisciplinary Research Center, Shanghai Advanced Research Institute, The Chinese Academy of Sciences, Shanghai, China. .,Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai, China.
| | - Bing Yang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China. .,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China.
| | - Qiang Fu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China. .,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China.
| | - Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China. .,Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China.
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17
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Zhdanov VP. Nanocrystallites, adsorption, surface tension, and Wulff rule. Phys Rev E 2021; 103:012802. [PMID: 33601602 DOI: 10.1103/physreve.103.012802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/06/2021] [Indexed: 12/28/2022]
Abstract
Chemisorption on the surface of metal nanocrystallites (NCs) sometimes induces their reshaping. This interesting phenomenon was observed experimentally in various systems. Related theoretical studies imply that it can be described using the Wulff rule with the surface tension dependent on the coverage of the NC facets by adsorbate. There is, however, no agreement as to how the surface tension should be calculated in this case. Relying on the laws of statistical physics, I clarify the situation in this area in general and also in the framework of the mean-field approximation in three situations: (i) with adsorption-desorption equilibrium, (ii) with a fixed amount of adsorbate at a NC, and (iii) with a fixed amount of adsorbate at facets of a NC. Under these conditions, the surface tension is shown to be described by the same expressions.
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Affiliation(s)
- Vladimir P Zhdanov
- Department of Physics, Chalmers University of Technology, Göteborg, Sweden and Boreskov Institute of Catalysis, Russian Academy of Sciences, Novosibirsk, Russia
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18
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An Q, McDonald M, Fortunelli A, Goddard WA. Controlling the Shapes of Nanoparticles by Dopant-Induced Enhancement of Chemisorption and Catalytic Activity: Application to Fe-Based Ammonia Synthesis. ACS NANO 2021; 15:1675-1684. [PMID: 33355457 DOI: 10.1021/acsnano.0c09346] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We showed recently that the catalytic efficiency of ammonia synthesis on Fe-based nanoparticles (NP) for Haber-Bosch (HB) reduction of N2 to ammonia depends very dramatically on the crystal surface exposed and on the doping. In turn, the stability of each surface depends on the stable intermediates present during the catalysis. Thus, under reaction conditions, the shape of the NP is expected to evolve to optimize surface energies. In this paper, we propose to manipulate the shape of the nanoparticles through doping combined with chemisorption and catalysis. To do this, we consider the relationships between the catalyst composition (adding dopant elements) and on how the distribution of the dopant atoms on the bulk and facet sites affects the shape of the particles and therefore the number of active sites on the catalyst surfaces. We use our hierarchical, high-throughput catalyst screening (HHTCS) approach but extend the scope of HHTCS to select dopants that can increase the catalytically active surface orientations, such as Fe-bcc(111), at the expense of catalytically inactive facets, such as Fe-bcc(100). Then, for the most promising dopants, we predict the resulting shape and activity of doped Fe-based nanoparticles under reaction conditions. We examined 34 possible dopants across the periodic table and found 16 dopants that can potentially increase the fraction of active Fe-bcc(111) vs inactive Fe-bcc(100) facets. Combining this reshaping criterion with our HHTCS estimate of the resulting catalytic performance, we show that Si and Ni are the most promising elements for improving the rates of catalysis by optimizing the shape to decrease reaction barriers. Then, using Si dopant as a working example, we build a steady-state dynamical Wulff construction of Si-doped Fe bcc nanoparticles. We use nanoparticles with a diameter of ∼10 nm, typical of industrial catalysts. We predict that doping Si into such Fe nanoparticles at the optimal atomic content of ∼0.3% leads to rate enhancements by a factor of 56 per nanoparticle under target HB conditions.
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Affiliation(s)
- Qi An
- Department of Chemical and Materials Engineering, University of Nevada-Reno, Reno, Nevada 89577, United States
| | - Molly McDonald
- Department of Chemical and Materials Engineering, University of Nevada-Reno, Reno, Nevada 89577, United States
| | - Alessandro Fortunelli
- Materials and Process Simulation Center (MSC), California Institute of Technology, Pasadena, California 91125, United States
- CNR-ICCOM, Consiglio Nazionale delle Ricerche, ThC2-Lab, Pisa 56124, Italy
| | - William A Goddard
- Materials and Process Simulation Center (MSC), California Institute of Technology, Pasadena, California 91125, United States
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19
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Tang M, Yuan W, Ou Y, Li G, You R, Li S, Yang H, Zhang Z, Wang Y. Recent Progresses on Structural Reconstruction of Nanosized Metal Catalysts via Controlled-Atmosphere Transmission Electron Microscopy: A Review. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03335] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Min Tang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Wentao Yuan
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yang Ou
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guanxing Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ruiyang You
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Songda Li
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hangsheng Yang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ze Zhang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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20
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21
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Abstract
Given the importance of SO2 as a pollutant species in the environment and its role in the hybrid sulphur (HyS) cycle for hydrogen production, we carried out a density functional theory study of its interaction with the Pt (001), (011), and (111) surfaces. First, we investigated the adsorption of a single SO2 molecule on the three Pt surfaces. On both the (001) and (111) surfaces, the SO2 had a S,O-bonded geometry, while on the (011) surface, it had a co-pyramidal and bridge geometry. The largest adsorption energy was obtained on the (001) surface (Eads = −2.47 eV), followed by the (011) surface (Eads = −2.39 and −2.28 eV for co-pyramidal and bridge geometries, respectively) and the (111) surface (Eads = −1.85 eV). When the surface coverage was increased up to a monolayer, we noted an increase of Eads/SO2 for all the surfaces, but the (001) surface remained the most favourable overall for SO2 adsorption. On the (111) surface, we found that when the surface coverage was θ > 0.78, two neighbouring SO2 molecules reacted to form SO and SO3. Considering the experimental conditions, we observed that the highest coverage in terms of the number of SO2 molecules per metal surface area was (111) > (001) > (011). As expected, when the temperature increased, the surface coverage decreased on all the surfaces, and gradual desorption of SO2 would occur above 500 K. Total desorption occurred at temperatures higher than 700 K for the (011) and (111) surfaces. It was seen that at 0 and 800 K, only the (001) and (111) surfaces were expressed in the morphology, but at 298 and 400 K, the (011) surface was present as well. Taking into account these data and those from a previous paper on water adsorption on Pt, it was evident that at temperatures between 400 and 450 K, where the HyS cycle operates, most of the water would desorb from the surface, thereby increasing the SO2 concentration, which in turn may lead to sulphur poisoning of the catalyst.
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22
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Li S, Gu K, Wang H, Xu B, Li H, Shi X, Huang Z, Liu H. Degradable Holey Palladium Nanosheets with Highly Active 1D Nanoholes for Synergetic Phototherapy of Hypoxic Tumors. J Am Chem Soc 2020; 142:5649-5656. [DOI: 10.1021/jacs.9b12929] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shanshan Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic−Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Kai Gu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic−Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Hui Wang
- CAS Key Laboratory of Nanosystem and Hierarchial Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China
| | - Bolong Xu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic−Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Huawei Li
- CAS Key Laboratory of Nanosystem and Hierarchial Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China
| | - Xinghua Shi
- CAS Key Laboratory of Nanosystem and Hierarchial Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P.R. China
| | - Zhijun Huang
- Beijing National Laboratory of Molecular Sciences, Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Huiyu Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic−Inorganic Composites, Bionanomaterials & Translational Engineering Laboratory, Beijing Key Laboratory of Bioprocess, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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23
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Zhu B, Meng J, Yuan W, Zhang X, Yang H, Wang Y, Gao Y. Umformung von Metallnanopartikeln unter Reaktionsbedingungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201906799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Beien Zhu
- Shanghai Advanced Research InstituteChinese Academy of Sciences 201210 Shanghai China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wentao Yuan
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Xun Zhang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Hangsheng Yang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yong Wang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yi Gao
- Shanghai Advanced Research InstituteChinese Academy of Sciences 201210 Shanghai China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
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24
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Zhu B, Meng J, Yuan W, Zhang X, Yang H, Wang Y, Gao Y. Reshaping of Metal Nanoparticles Under Reaction Conditions. Angew Chem Int Ed Engl 2020; 59:2171-2180. [DOI: 10.1002/anie.201906799] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/10/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Beien Zhu
- Shanghai Advanced Research InstituteChinese Academy of Sciences 201210 Shanghai China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wentao Yuan
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Xun Zhang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Hangsheng Yang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yong Wang
- State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yi Gao
- Shanghai Advanced Research InstituteChinese Academy of Sciences 201210 Shanghai China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
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25
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Yuan W, Zhu B, Li XY, Hansen TW, Ou Y, Fang K, Yang H, Zhang Z, Wagner JB, Gao Y, Wang Y. Visualizing H2O molecules reacting at TiO2 active sites with transmission electron microscopy. Science 2020; 367:428-430. [DOI: 10.1126/science.aay2474] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/24/2019] [Accepted: 12/10/2019] [Indexed: 01/10/2023]
Abstract
Imaging a reaction taking place at the molecular level could provide direct information for understanding the catalytic reaction mechanism. We used in situ environmental transmission electron microscopy and a nanocrystalline anatase titanium dioxide (001) surface with (1 × 4) reconstruction as a catalyst, which provided highly ordered four-coordinated titanium “active rows” to realize real-time monitoring of water molecules dissociating and reacting on the catalyst surface. The twin-protrusion configuration of adsorbed water was observed. During the water–gas shift reaction, dynamic changes in these structures were visualized on these active rows at the molecular level.
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Affiliation(s)
- Wentao Yuan
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Xiao-Yan Li
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Thomas W. Hansen
- DTU Nanolab, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Yang Ou
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Ke Fang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Hangsheng Yang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Ze Zhang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Jakob B. Wagner
- DTU Nanolab, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210 China
| | - Yong Wang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
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26
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Narayana A, Bhat SA, Fathima A, Lokesh SV, Surya SG, Yelamaggad CV. Green and low-cost synthesis of zinc oxide nanoparticles and their application in transistor-based carbon monoxide sensing. RSC Adv 2020; 10:13532-13542. [PMID: 35492987 PMCID: PMC9051533 DOI: 10.1039/d0ra00478b] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/20/2020] [Indexed: 12/12/2022] Open
Abstract
There has been steady progress in developing reliable and cost-effective strategies for the clean production of zinc oxide (ZnO) nanoparticles (NPs) owing to their unique structural and wide functional characteristics. While the green synthesis of such NPs from plant extracts has emerged as a sustainable and eco-friendly protocol, it is greatly restricted owing to the scarcity of potential natural precursors necessitating comprehensive investigations in this direction. Herein, we report a facile, low-cost green synthesis and characterization of ZnO NPs along with the demonstration of their usage as an active media in organic field-effect transistor (OFET) devices for sensing carbon monoxide (CO) gas. The ZnO NPs obtained from Nelumbo nucifera (lotus) leaf extract-mediated solution combustion synthesis at a much lower initiation temperature, the first of its kind, were characterized by various techniques such as UV-vis spectroscopy, XRD, EDX analysis, TEM and FESEM. The data derived from these experiments clearly evidence the formation of very pure and crystalline ZnO NPs possessing nearly spherical-shape with a size of 3–4 nm. The p-type organic field-effect transistor (OFET) device, fabricated using poly(3-hexylthiophene-2,5-diyl) (P3HT) and ZnO NPs, showed a field-effect mobility of 10−2 cm2 V−1 sec−1 with a slightly enhanced response of detecting CO gas at room temperature (RT). The phenomenon was further confirmed by the variation in electrical parameters of the OFET such as field-effect mobility (μ), on-current (Ion), and off-current (Ioff). The selectivity and sensitivity of the fabricated device in CO gas detection was found to be more prominent than the other reducing gases (hydrogen sulphide, H2S and ammonia, NH3) and methanol vapours tested. An OFET-based CO gas sensor has been demonstrated where ZnO NPs realized by an inexpensive, environmentally friendly method have been employed as an active medium.![]()
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Affiliation(s)
- Ashwath Narayana
- Department of Bio-Medical Engineering
- Rajiv Gandhi Institute of Technology
- Bengaluru
- India
| | | | - Almas Fathima
- Department of Bio-Medical Engineering
- Rajiv Gandhi Institute of Technology
- Bengaluru
- India
| | - S. V. Lokesh
- Department of Nanotechnology
- Centre for PG Studies- Bangalore Region
- Visvesvaraya Technological University
- Chikkaballapur
- India
| | - Sandeep G. Surya
- Electrical Engineering Department
- Indian Institute of Technology Bombay
- Mumbai
- India
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27
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Ungerer M, Santos-Carballal D, Cadi-Essadek A, van Sittert CGCE, de Leeuw NH. Interaction of H 2O with the Platinum Pt (001), (011), and (111) Surfaces: A Density Functional Theory Study with Long-Range Dispersion Corrections. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:27465-27476. [PMID: 32064018 PMCID: PMC7011760 DOI: 10.1021/acs.jpcc.9b06136] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 09/25/2019] [Indexed: 05/09/2023]
Abstract
Platinum is a noble metal that is widely used for the electrocatalytic production of hydrogen, but the surface reactivity of platinum toward water is not yet fully understood, even though the effect of water adsorption on the surface free energy of Pt is important in the interpretation of the morphology and catalytic properties of this metal. In this study, we have carried out density functional theory calculations with long-range dispersion corrections [DFT-D3-(BJ)] to investigate the interaction of H2O with the Pt (001), (011), and (111) surfaces. During the adsorption of a single H2O molecule on various Pt surfaces, it was found that the lowest adsorption energy (E ads) was obtained for the dissociative adsorption of H2O on the (001) surface, followed by the (011) and (111) surfaces. When the surface coverage was increased up to a monolayer, we noted an increase in E ads/H2O with increasing coverage for the (001) surface, while for the (011) and (111) surfaces, E ads/H2O decreased. Considering experimental conditions, we observed that the highest coverage was obtained on the (011) surface, followed by the (111) and (001) surfaces. However, with an increase in temperature, the surface coverage decreased on all the surfaces. Total desorption occurred at temperatures higher than 400 K for the (011) and (111) surfaces, but above 850 K for the (001) surface. From the morphology analysis of the Pt nanoparticle, we noted that, when the temperature increased, only the electrocatalytically active (111) surface remained.
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Affiliation(s)
- Marietjie
J. Ungerer
- Laboratory
for Applied Molecular Modelling, Research Focus Area: Chemical Resource
Beneficiation, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - David Santos-Carballal
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Materials
Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa
| | - Abdelaziz Cadi-Essadek
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - Cornelia G. C. E. van Sittert
- Laboratory
for Applied Molecular Modelling, Research Focus Area: Chemical Resource
Beneficiation, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
- E-mail: (C.G.C.E.v.S.)
| | - Nora H. de Leeuw
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Department
of Earth Sciences, Utrecht University, Princetonplein 8A, 3584 CD Utrecht, The Netherlands
- E-mail: (N.H.d.L.)
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28
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Bergmann A, Roldan Cuenya B. Operando Insights into Nanoparticle Transformations during Catalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01831] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Arno Bergmann
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz-Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
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29
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Du J, Meng J, Li XY, Zhu B, Gao Y. Multiscale atomistic simulation of metal nanoparticles under working conditions. NANOSCALE ADVANCES 2019; 1:2478-2484. [PMID: 36132725 PMCID: PMC9419150 DOI: 10.1039/c9na00196d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 06/10/2019] [Indexed: 06/10/2023]
Abstract
With the fast development of in situ experimental methodologies, dramatic structure reconstructions of nanomaterials that only occur under reaction conditions have been discovered in recent years, which are critical for their application in catalysis, biomedicine, and biosensors. A big challenge for theoreticians is thus to establish reliable models to reproduce the experimental observations quantitatively, and further to make predictions beyond experimental conditions. Herein, we briefly summarize the recent theoretical advances involving the quantitative predictions of equilibrium shapes of metal nanoparticles under reaction conditions and the real-time simulations of nanocrystal transformations. The comparisons between the theoretical and experimental results are presented. This minireview not only helps researchers understand the in situ observations at the atomic level, but also is beneficial for prescreening and optimizing the NPs for practical use.
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Affiliation(s)
- Jifeng Du
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiao-Yan Li
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences Shanghai 201210 China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences Shanghai 201210 China
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30
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De Vrieze JE, Bremmer GM, Aly M, Navarro V, Thybaut JW, Kooyman PJ, Saeys M. Shape of Cobalt and Platinum Nanoparticles Under a CO Atmosphere: A Combined In Situ TEM and Computational Catalysis Study. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01840] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jenoff E. De Vrieze
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - G. Marien Bremmer
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Mostafa Aly
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Violeta Navarro
- Huygens-Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
| | - Joris W. Thybaut
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
| | - Patricia J. Kooyman
- Catalysis Institute, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
| | - Mark Saeys
- Laboratory for Chemical Technology, Ghent University, Technologiepark 125, B-9052 Ghent, Belgium
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Meng J, Hou C, Wang H, Chi Q, Gao Y, Zhu B. Oriented attachment growth of monocrystalline cuprous oxide nanowires in pure water. NANOSCALE ADVANCES 2019; 1:2174-2179. [PMID: 36131967 PMCID: PMC9417747 DOI: 10.1039/c8na00374b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 03/24/2019] [Indexed: 06/15/2023]
Abstract
As a crucial mechanism of non-classical crystallization, the oriented attachment (OA) growth of nanocrystals is of great interest in nanoscience and materials science. The OA process occurring in aqueous solution with chemical reagents has been reported many times, but there are limited studies reporting the OA growth in pure water. In this work, we report the temperature-dependent OA growth of cuprous oxide (Cu2O) nanowires in pure water through a reagent-free electrophoretic method. Our experiments demonstrate that Cu2O quantum dots randomly coalesced to form polycrystalline nanowires at room temperature, while they form monocrystalline nanowires at higher temperatures by the OA mechanism. DFT modeling and computations indicate that the water coverage on the Cu2O nanoparticles could affect the particle attachment mechanisms. This study sheds light on the understanding of the effects of water molecules on the OA mechanism and shows new approaches for better controllable non-classical crystallization in pure water.
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Affiliation(s)
- Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Chengyi Hou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University Shanghai 201620 People's Republic of China
- Department of Chemistry, Technical University of Denmark DK-2800 Kongens Lyngby Denmark
| | - Hongzhi Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University Shanghai 201620 People's Republic of China
| | - Qijin Chi
- Department of Chemistry, Technical University of Denmark DK-2800 Kongens Lyngby Denmark
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences 201210 Shanghai China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences Shanghai 201800 China
- Shanghai Advanced Research Institute, Chinese Academy of Sciences 201210 Shanghai China
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Liu L, Yu M, Hou B, Wang Q, Zhu B, Jia L, Li D. Morphology evolution of fcc Ru nanoparticles under hydrogen atmosphere. NANOSCALE 2019; 11:8037-8046. [PMID: 30968086 DOI: 10.1039/c9nr01611b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Tuning the morphology and structural evolution of metal nanoparticles to expose specific crystal facets in a certain reaction atmosphere is conducive to designing catalysts with a high catalytic activity. Herein, coverage dependent hydrogen adsorption on seven fcc Ru surfaces was investigated using density functional theory (DFT) calculations. The morphology evolution of the fcc Ru nanoparticles under the reactive environment was further illustrated using the multiscale structure reconstruction (MSR) model, which combines the DFT results with the Fowler-Guggenheim (F-G) adsorption isotherm and the Wulff construction. At constant pressure, the shape of a fcc Ru nanoparticle changes from a rhombic dodecahedron to a truncated octahedron with an increase of the temperature. More importantly, the desired Ru morphology, with abundant open facets, was predicted to occur at a high temperature and low pressure. Our results provide an insightful understanding of the reshaping of Ru nanoparticles during real reactions, which is crucial for its rational design for use as a nanocatalyst.
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Affiliation(s)
- Lili Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China.
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33
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Chan CH, Poignant F, Beuve M, Dumont E, Loffreda D. A Water Solvation Shell Can Transform Gold Metastable Nanoparticles in the Fluxional Regime. J Phys Chem Lett 2019; 10:1092-1098. [PMID: 30707843 DOI: 10.1021/acs.jpclett.8b03822] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Solvated gold nanoparticles have been modeled in the fluxional regime by density functional theory including dispersion forces for an extensive set of conventional morphologies. The study of isolated adsorption of one water molecule shows that the most stable adsorption forms are similar (corners and edges) regardless of the nanoparticle shape and size, although the adsorption strength differs significantly (0.15 eV). When a complete and explicit water solvation shell interacts with gold nanoclusters, metastable in vacuum and presenting a predominance of (100) square facets (ino-decahedra Au55 and Au147), these nanoparticles are found unstable and transform into the closest morphologies exhibiting mainly (111) triangular facets and symmetries. The corresponding adsorption strength per water molecule becomes independent of shape and size and is enhanced by the formation of two hydrogen bonds on average. For applications in radiotherapy, this study suggests that the shapes of small gold nanoparticles should be homogenized by interacting with the biological environment.
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Affiliation(s)
- Chen-Hui Chan
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , Laboratoire de Chimie, F-69342 Lyon , France
| | - Floriane Poignant
- Univ Lyon, Université Lyon 1, UMR CNRS5822/IN2P3, IPNL, PRISME, PHABIO, Villeurbanne 69322 , France
| | - Michaël Beuve
- Univ Lyon, Université Lyon 1, UMR CNRS5822/IN2P3, IPNL, PRISME, PHABIO, Villeurbanne 69322 , France
| | - Elise Dumont
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , Laboratoire de Chimie, F-69342 Lyon , France
| | - David Loffreda
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , Laboratoire de Chimie, F-69342 Lyon , France
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Chmielewski A, Meng J, Zhu B, Gao Y, Guesmi H, Prunier H, Alloyeau D, Wang G, Louis C, Delannoy L, Afanasiev P, Ricolleau C, Nelayah J. Reshaping Dynamics of Gold Nanoparticles under H 2 and O 2 at Atmospheric Pressure. ACS NANO 2019; 13:2024-2033. [PMID: 30620561 DOI: 10.1021/acsnano.8b08530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Despite intensive research efforts, the nature of the active sites for O2 and H2 adsorption/dissociation by supported gold nanoparticles (NPs) is still an unresolved issue in heterogeneous catalysis. This stems from the absence of a clear picture of the structural evolution of Au NPs at near reaction conditions, i. e., at high pressures and high temperatures. We hereby report real-space observations of the equilibrium shapes of titania-supported Au NPs under O2 and H2 at atmospheric pressure using gas transmission electron microscopy. In situ TEM observations show instantaneous changes in the equilibrium shape of Au NPs during cooling under O2 from 400 °C to room temperature. In comparison, no instant change in equilibrium shape is observed under a H2 environment. To interpret these experimental observations, the equilibrium shape of Au NPs under O2, atomic oxygen, and H2 is predicted using a multiscale structure reconstruction model. Excellent agreement between TEM observations and theoretical modeling of Au NPs under O2 provides strong evidence for the molecular adsorption of oxygen on the Au NPs below 120 °C on specific Au facets, which are identified in this work. In the case of H2, theoretical modeling predicts no interaction with gold atoms that explain their high morphological stability under this gas. This work provides atomic structural information for the fundamental understanding of the O2 and H2 adsorption properties of Au NPs under real working conditions and shows a way to identify the active sites of heterogeneous nanocatalysts under reaction conditions by monitoring the structure reconstruction.
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Affiliation(s)
- Adrian Chmielewski
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
- Institut Charles Gerhardt Montpellier, CNRS/ENSCM/UM , 240, Avenue du Professeur Emile Jeanbrau , 34090 Montpellier , France
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800 , China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology , Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800 , China
| | - Hazar Guesmi
- Institut Charles Gerhardt Montpellier, CNRS/ENSCM/UM , 240, Avenue du Professeur Emile Jeanbrau , 34090 Montpellier , France
| | - Hélène Prunier
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
| | - Damien Alloyeau
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
| | - Guillaume Wang
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
| | - Catherine Louis
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS , F-75252 Paris , France
| | - Laurent Delannoy
- Sorbonne Université, CNRS, Laboratoire de Réactivité de Surface, LRS , F-75252 Paris , France
| | - Pavel Afanasiev
- Université de Lyon, Institut de Recherches sur la Catalyse et l'Environnement de Lyon - IRCELYON - UMR 5256, CNRS-UCB Lyon 1 , 2 Avenue Albert Einstein , 69626 Villeurebanne Cedex, France
| | - Christian Ricolleau
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
| | - Jaysen Nelayah
- Université Paris Diderot , Sorbonne Paris Cité, CNRS, Laboratoire Matériaux et Phénomènes Quantiques, UMR 7162, 75013 Paris , France
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35
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Zhao P, Cao Z, Liu X, Ren P, Cao DB, Xiang H, Jiao H, Yang Y, Li YW, Wen XD. Morphology and Reactivity Evolution of HCP and FCC Ru Nanoparticles under CO Atmosphere. ACS Catal 2019. [DOI: 10.1021/acscatal.8b05074] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Zhao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P.R. China
| | - Zhi Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xingchen Liu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Pengju Ren
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Dong-Bo Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Hongwei Xiang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Haijun Jiao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein Strasse 29a, 18059 Rostock, Germany
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P.R. China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P.R. China
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36
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Effect of Both the Phase Composition and Modification Methods on Structural-Adsorption Parameters of Dispersed Silicas. COLLOIDS AND INTERFACES 2018. [DOI: 10.3390/colloids3010001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Tripoli from two Ukrainian deposits was studied in its natural and modified forms. The investigation of natural and modified tripoli involves the identification of their phase compositions through X-ray diffraction and the analysis of their water vapor adsorption-desorption isotherms. The obtained results are evidence of changes in the structural-adsorption parameters of tripoli as a result of modification. Their treatment in boiling water or acid causes apparent alterations of contents of the main phases and sizes of their crystallites, whereas their calcination causes not only the dehydroxylation of surfaces and the agglomeration of phases, but even phase transformation in the case of carbonate tripoli. After analyzing water vapor adsorption-desorption isotherms of natural and modified tripolis, some correlations between their adsorption parameters, phase compositions, main phase contents and crystallite sizes have been found.
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37
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Abstract
Manganese oxide forms prepared by different methods differ by their compositions, phase ratios in polyphase samples, and crystallite sizes (XRD and TEM characterization). Among the phases, tunnel-structured β-MnO2 (pyrolusite), α-MnO2 (cryptomelane), ε-MnO2 (akhtenskite), and β-Mn2O3 (bixbyite) have been identified. Water vapor sorption isotherms showed substantial differences in the affinities of water molecules to oxide surfaces of the manganese oxide forms under study. The parameters of the BET equation and pore size distribution curves have been calculated. The manganese oxide forms have mesoporous structures characterized by uniform and non-uniform pore sizes as well as by moderate hydrophilic behavior.
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38
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Li X, Zhu B, Qi R, Gao Y. Real‐Time Simulation of Nonequilibrium Nanocrystal Transformations. ADVANCED THEORY AND SIMULATIONS 2018. [DOI: 10.1002/adts.201800127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao‐Yan Li
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
- X.‐Y. Li, R. QiUniversity of Chinese Academy of Sciences 100049 Beijing China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Rui Qi
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
- X.‐Y. Li, R. QiUniversity of Chinese Academy of Sciences 100049 Beijing China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
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39
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Kozawa T, Hirobe D, Uehara K, Naito M. Low-temperature synthesis of LiNi0.5Mn1.5O4 grains using a water vapor-assisted solid-state reaction. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.04.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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40
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Duan M, Yu J, Meng J, Zhu B, Wang Y, Gao Y. Reconstruction of Supported Metal Nanoparticles in Reaction Conditions. Angew Chem Int Ed Engl 2018; 57:6464-6469. [DOI: 10.1002/anie.201800925] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/26/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Manyi Duan
- College of Physics and Electronic EngineeringSichuan Normal University Chengdu 610101 China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Jian Yu
- Center of Electron Microscopy and State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
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41
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Duan M, Yu J, Meng J, Zhu B, Wang Y, Gao Y. Reconstruction of Supported Metal Nanoparticles in Reaction Conditions. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800925] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Manyi Duan
- College of Physics and Electronic EngineeringSichuan Normal University Chengdu 610101 China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Jian Yu
- Center of Electron Microscopy and State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon MaterialsSchool of Materials Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsChinese Academy of Sciences Shanghai 201800 China
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42
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Naitabdi A, Boucly A, Rochet F, Fagiewicz R, Olivieri G, Bournel F, Benbalagh R, Sirotti F, Gallet JJ. CO oxidation activity of Pt, Zn and ZnPt nanocatalysts: a comparative study by in situ near-ambient pressure X-ray photoelectron spectroscopy. NANOSCALE 2018; 10:6566-6580. [PMID: 29577122 DOI: 10.1039/c7nr07981h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The investigation of nanocatalysts under ambient pressure by X-ray photoelectron spectroscopy gives access to a wealth of information on their chemical state under reaction conditions. Considering the paradigmatic CO oxidation reaction, a strong synergistic effect on CO catalytic oxidation was recently observed on a partly dewetted ZnO(0001)/Pt(111) single crystal surface. In order to bridge the material gap, we have examined whether this inverse metal/oxide catalytic effect could be transposed on supported ZnPt nanocatalysts deposited on rutile TiO2(110). Synchrotron radiation near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) operated at 1 mbar of O2 : CO mixture (4 : 1) was used at a temperature range between room temperature and 450 K. To tackle the complexity of the problem, we have also studied the catalytic activity of nanoparticles (NPs) of the same size, consisting of pure Pt and Zn nanoparticles (NPs), for which, moreover, NAP-XPS studies are a novelty. The comparative approach shows that the CO oxidation process is markedly different for the pure Pt and pure Zn NPs. For pure Pt NPs, CO poisoned the metallic surfaces at low temperature at the onset of CO2 evolution. In contrast, the pure Zn NPs first oxidize into ZnO, and trap carbonates at low temperature. Then they start to release CO2 in the gas phase, at a critical temperature, while continuously producing it. The pure Zn NPs are also immune to support encapsulation. The bimetallic nanoparticle borrows some of its characteristics from its two parent metals. In fact, the ZnPt NP, although produced by the sequential deposition of platinum and zinc, is platinum-terminated below the temperature onset of CO oxidation and poisoned by CO. Above the CO oxidation onset, the nanoparticle becomes Zn-rich with a ZnO shell. Pure Pt and ZnPt NPs present a very similar activity towards CO oxidation, in contrast with what is reported in a single crystal study. The present study demonstrates the effectiveness of NAP-XPS in the study of complex catalytic processes at work on nanocatalysts under near-ambient pressures, and highlights once more the difficulty of transposing single crystal surface observations to the case of nanoobjects.
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Affiliation(s)
- Ahmed Naitabdi
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique Matière et Rayonnement, 4 place Jussieu, 75005 Paris, France.
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43
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Zhang X, Meng J, Zhu B, Yuan W, Yang H, Zhang Z, Gao Y, Wang Y. Unexpected refacetting of palladium nanoparticles under atmospheric N2 conditions. Chem Commun (Camb) 2018; 54:8587-8590. [DOI: 10.1039/c8cc04574g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ TEM observations and DFT calculations reveal that the “inert” gas N2 has the ability to modify the structure of metal nanoparticles.
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Affiliation(s)
- Xun Zhang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Wentao Yuan
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Hangsheng Yang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ze Zhang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Yong Wang
- State Key Laboratory of Silicon Materials and Center of Electron Microscopy
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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44
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Rahm JM, Erhart P. Beyond Magic Numbers: Atomic Scale Equilibrium Nanoparticle Shapes for Any Size. NANO LETTERS 2017; 17:5775-5781. [PMID: 28792765 DOI: 10.1021/acs.nanolett.7b02761] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
In the pursuit of complete control over morphology in nanoparticle synthesis, knowledge of the thermodynamic equilibrium shapes is a key ingredient. While approaches exist to determine the equilibrium shape in the large size limit (≳10-20 nm) as well as for very small particles (≲2 nm), the experimentally increasingly important intermediate size regime has largely remained elusive. Here, we present an algorithm, based on atomistic simulations in a constrained thermodynamic ensemble, that efficiently predicts equilibrium shapes for any number of atoms in the range from a few tens to many thousands of atoms. We apply the algorithm to Cu, Ag, Au, and Pd particles with diameters between approximately 1 and 7 nm and reveal an energy landscape that is more intricate than previously suggested. The thus obtained particle type distributions demonstrate that the transition from icosahedral particles to decahedral and further into truncated octahedral particles occurs only very gradually, which has implications for the interpretation of experimental data. The approach presented here is extensible to alloys and can in principle also be adapted to represent different chemical environments.
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Affiliation(s)
- J Magnus Rahm
- Chalmers University of Technology , Department of Physics, S-412 96 Gothenburg, Sweden
| | - Paul Erhart
- Chalmers University of Technology , Department of Physics, S-412 96 Gothenburg, Sweden
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45
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Medrano Sandonas L, Landauro CV. Disorder-induced metal-insulator transition in cooled silver and copper nanoparticles: A statistical study. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.05.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Zhang X, Meng J, Zhu B, Yu J, Zou S, Zhang Z, Gao Y, Wang Y. In situ TEM studies of the shape evolution of Pd nanocrystals under oxygen and hydrogen environments at atmospheric pressure. Chem Commun (Camb) 2017; 53:13213-13216. [DOI: 10.1039/c7cc07649e] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The shape evolutions of Pd nanocrystals under oxygen and hydrogen environments at atmospheric pressure were studied using in situ TEM.
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Affiliation(s)
- Xun Zhang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Jun Meng
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Beien Zhu
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Jian Yu
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Shihui Zou
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ze Zhang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Yi Gao
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- China
| | - Yong Wang
- Center of Electron Microscopy and State Key Laboratory of Silicon Materials
- Department of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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47
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Qi C, Zhou B, Wang C, Zheng Y, Fang H. A nonmonotonic dependence of the contact angles on the surface polarity for a model solid surface. Phys Chem Chem Phys 2017; 19:6665-6670. [DOI: 10.1039/c6cp08275k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We found an unusual nonmonotonic contact angle dependence of the surface polarity (denoted as q) on a solid surface with specific charge patterns, where the contact angle firstly decreases and then increases as q increases from 0 e to 1.0 e.
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Affiliation(s)
- Chonghai Qi
- School of Physics
- Shandong University
- Jinan 250100
- China
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
| | - Bo Zhou
- School of Electronic Engineering
- Chengdu Technological University
- Chengdu 611730
- China
| | - Chunlei Wang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
| | - Yujun Zheng
- School of Physics
- Shandong University
- Jinan 250100
- China
| | - Haiping Fang
- Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
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48
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Thomele D, Bourret GR, Bernardi J, Bockstedte M, Diwald O. Hydroxylation Induced Alignment of Metal Oxide Nanocubes. Angew Chem Int Ed Engl 2016; 56:1407-1410. [PMID: 28005313 DOI: 10.1002/anie.201608538] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/27/2016] [Indexed: 01/03/2023]
Abstract
Water vapor is ubiquitous under ambient conditions and may alter the shape of nanoparticles. How to utilize water adsorption for nanomaterial functionality and structure formation, however, is a yet unexplored field. Herein, we report the use of water vapor to induce the self-organization of MgO nanocubes into regularly staggered one-dimensional structures. This transformation evolves via an initial alignment of the MgO cubes, the formation of intermediate elongated Mg(OH)2 structures, and their reconversion into MgO cubes arranged in staggered structures. Ab initio DFT modelling identifies surface-energy changes associated with the cube surface hydration and hydroxylation to promote the uncommon staggered stacked assembly of the cubes. This first observation of metal oxide nanoparticle self-organization occurring outside a bulk solution may pave novel routes for inducing texture in ceramics and represents a great test-bed for new surface-science concepts.
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Affiliation(s)
- Daniel Thomele
- Department of Chemistry and Physics of Materials, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34/III, 5020, Salzburg, Austria
| | - Gilles R Bourret
- Department of Chemistry and Physics of Materials, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34/III, 5020, Salzburg, Austria
| | - Johannes Bernardi
- University Service Center for Transmission Electron Microscopy, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria
| | - Michel Bockstedte
- Department of Chemistry and Physics of Materials, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34/III, 5020, Salzburg, Austria.,Lehrstuhl für Theoretische Festkörperphysik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstrasse 7B2, 91058, Erlangen, Germany
| | - Oliver Diwald
- Department of Chemistry and Physics of Materials, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34/III, 5020, Salzburg, Austria
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49
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Thomele D, Bourret GR, Bernardi J, Bockstedte M, Diwald O. Organisation von Metalloxid‐Nanowürfeln durch Hydroxylierung. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Daniel Thomele
- Fachbereich Chemie und Physik der Materialien Paris Lodron Universität Salzburg Hellbrunnerstraße 34/III 5020 Salzburg Österreich
| | - Gilles R. Bourret
- Fachbereich Chemie und Physik der Materialien Paris Lodron Universität Salzburg Hellbrunnerstraße 34/III 5020 Salzburg Österreich
| | - Johannes Bernardi
- Universitätsservicezentrum für Transmissionselektronenmikroskopie TU Wien Wiedner Hauptstraße 8–10 1040 Wien Österreich
| | - Michel Bockstedte
- Fachbereich Chemie und Physik der Materialien Paris Lodron Universität Salzburg Hellbrunnerstraße 34/III 5020 Salzburg Österreich
- Lehrstuhl für Theoretische Festkörperphysik Friedrich-Alexander-Universität Erlangen-Nürnberg Staudtstraße 7B2 91058 Erlangen Deutschland
| | - Oliver Diwald
- Fachbereich Chemie und Physik der Materialien Paris Lodron Universität Salzburg Hellbrunnerstraße 34/III 5020 Salzburg Österreich
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50
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Kozawa T, Yanagisawa K, Murakami T, Naito M. Growth behavior of LiMn2O4 particles formed by solid-state reactions in air and water vapor. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.08.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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