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Podobiński J, Datka J. Characterisation of Basic Sites on Ga 2O 3, MgO, and ZnO with Preadsorbed Ethanol and Ammonia-IR Study. Molecules 2024; 29:3070. [PMID: 38999022 PMCID: PMC11243292 DOI: 10.3390/molecules29133070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 06/19/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024] Open
Abstract
The effect of adsorption of ethanol and ammonia on the basicity of Ga2O3, MgO, and ZnO was examined via IR studies of CO2 adsorption. Ethanol reacts with OH groups on Ga2O3, and MgO, forming ethoxyl groups. The substitution of surface hydroxyls by ethoxyls increases the basicity of the neighbouring oxygen. The ethoxyl groups that also form on ZnO do not contain surface OH groups, but the mechanism of their formation is different. On ZnO, ethoxy groups are formed by the reaction of ethanol with surface oxygens. The presence of ethoxyls on ZnO decreases the basicity because some surface oxygens are already engaged in the bonding of ethoxyl groups. The effect of ammonia adsorption on basicity is different for each oxide. For Ga2O3, ammonia adsorption increases the basicity of neighbouring oxygen sites. Ammonia is not adsorbed on MgO; therefore, it does not change the basicity of this oxide. Ammonia adsorbed on ZnO forms coordination bonds with Zn sites; it does not change the number of basic sites but changes how carbonate species are bonded to surface sites.
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Affiliation(s)
| | - Jerzy Datka
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland;
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2
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Luong NT, Boily JF. Water Film-Driven Brucite Nanosheet Growth and Stacking. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11090-11098. [PMID: 37486722 PMCID: PMC10413962 DOI: 10.1021/acs.langmuir.3c01411] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/11/2023] [Indexed: 07/25/2023]
Abstract
Thin water films that form by the adhesion and condensation of air moisture on minerals can initiate phase transformation reactions with broad implications in nature and technology. We here show important effects of water film coverages on reaction rates and products during the transformation of periclase (MgO) nanocubes to brucite [Mg(OH)2] nanosheets. Using vibrational spectroscopy, we found that the first minutes to hours of Mg(OH)2 growth followed first-order kinetics, with rates scaling with water loadings. Growth was tightly linked to periclase surface hydration and to the formation of a brucite precursor solid, akin to poorly stacked/dislocated nanosheets. These nanosheets were the predominant forms of Mg(OH)2 growth in the 2D-like hydration environments of sub-monolayer water films, which formed below ∼50% relative humidity (RH). From molecular simulations, we infer that reactions may have been facilitated near surface defects where sub-monolayer films preferentially accumulated. In contrast, the 3D-like hydration environment of multilayered water films promoted brucite nanoparticle formation by enhancing Mg(OH)2 nanosheet growth and stacking rates and yields. From the structural similarity of periclase and brucite to other metal (hydr)oxide minerals, this concept of contrasting nanosheet growth should even be applicable for explaining water film-driven mineralogical transformations on other related nanominerals.
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Affiliation(s)
- N. Tan Luong
- Department of Chemistry, Umeå
University, Umeå SE 901 87, Sweden
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3
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Fang Z, Xu H, Xu Q, Meng L, Lu N, Li R, Müller-Buschbaum P, Zhong Q. High Efficiency of Formaldehyde Removal and Anti-bacterial Capability Realized by a Multi-Scale Micro-Nano Channel Structure in Hybrid Hydrogel Coating Cross-Linked on Microfiber-Based Polyurethane. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37429826 DOI: 10.1021/acsami.3c07210] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Inspired by the transpiration in the tree stem having a vertical and porous channel structure, high efficiency of formaldehyde removal is realized by the multi-scale micro-nano channel structure in a hybrid P(AAm/DA)-Ag/MgO hydrogel coating cross-linked on microfiber-based polyurethane. The present multi-scale channel structure is formed by a joint effect of directional freezing and redox polymerization as well as nanoparticles-induced porosity. Due to the large number of vertically aligned channels of micrometer size and an embedded porous structure of nanometer size, the specific surface area is significantly increased. Therefore, formaldehyde from solution can be rapidly adsorbed by the amine group in the hydrogels and efficiently degraded by the Ag/MgO nanoparticles. By only immersing in formaldehyde solution (0.2 mg mL-1) for 12 h, 83.8% formaldehyde is removed by the hybrid hydrogels with a multi-scale channel structure, which is 60.8% faster than that observed in hydrogels without any channel structure. After cross-linking the hybrid hydrogels with a multi-scale channel structure to microfiber-based polyurethane and exposing to the formaldehyde vapor atmosphere, 79.2% formaldehyde is removed in 12 h, which is again 11.2% higher than that observed in hydrogels without any channel structure. Unlike the traditional approaches to remove formaldehyde by the light catalyst, no external conditions are required in our present hybrid hydrogel coating, which is very suitable for indoor use. In addition, due to the formation of free radicals by the Ag/MgO nanoparticles, the cross-linked hybrid hydrogel coating on polyurethane synthetic leather also shows good anti-bacterial capability. 99.99% of Staphylococcus aureus can be killed on the surface. Based on the good ability to remove formaldehyde and to kill bacteria, the obtained microfiber-based polyurethane cross-linked with a hybrid hydrogel coating containing a multi-scale channel structure can be used in a broad field of applications, such as furniture and car interior parts, to simultaneously solve the indoor air pollution and hygiene problems.
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Affiliation(s)
- Zheng Fang
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Huawei Xu
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - Qiang Xu
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - LiuBang Meng
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - Nan Lu
- National Engineering Lab for Textile Fiber Materials and Processing Technology, School of Materials Science & Engineering, Zhejiang Sci-Tech University, 310018 Hangzhou, China
| | - Renhong Li
- National Engineering Lab for Textile Fiber Materials and Processing Technology, School of Materials Science & Engineering, Zhejiang Sci-Tech University, 310018 Hangzhou, China
| | - Peter Müller-Buschbaum
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Street 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748 Garching, Germany
| | - Qi Zhong
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Street 1, 85748 Garching, Germany
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Luong NT, Holmboe M, Boily JF. MgO nanocube hydroxylation by nanometric water films. NANOSCALE 2023. [PMID: 37194306 DOI: 10.1039/d2nr07140a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Hydrophilic nanosized minerals exposed to air moisture host thin water films that are key drivers of reactions of interest in nature and technology. Water films can trigger irreversible mineralogical transformations, and control chemical fluxes across networks of aggregated nanomaterials. Using X-ray diffraction, vibrational spectroscopy, electron microscopy, and (micro)gravimetry, we tracked water film-driven transformations of periclase (MgO) nanocubes to brucite (Mg(OH)2) nanosheets. We show that three monolayer-thick water films first triggered the nucleation-limited growth of brucite, and that water film loadings continuously increased as newly-formed brucite nanosheets captured air moisture. Small (8 nm-wide) nanocubes were completely converted to brucite under this regime while growth on larger (32 nm-wide) nanocubes transitioned to a diffusion-limited regime when (∼0.9 nm-thick) brucite nanocoatings began hampering the flux of reactive species. We also show that intra- and inter-particle microporosity hosted a hydration network that sustained GPa-level crystallization pressures, compressing interlayer brucite spacing during growth. This was prevalent in aggregated 8 nm wide nanocubes, which formed a maze-like network of slit-shaped pores. By resolving the impact of nanocube size and microporosity on reaction yields and crystallization pressures, this work provides new insight into the study of mineralogical transformations induced by nanometric water films. Our findings can be applied to structurally related minerals important to nature and technology, as well as to advance ideas on crystal growth under nanoconfinement.
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Affiliation(s)
- N Tan Luong
- Department of Chemistry, Umeå University, SE 901 87 Umeå, Sweden.
| | - Michael Holmboe
- Department of Chemistry, Umeå University, SE 901 87 Umeå, Sweden.
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Yun TY, Chandler BD. Surface Hydroxyl Chemistry of Titania- and Alumina-Based Supports: Quantitative Titration and Temperature Dependence of Surface Brønsted Acid-Base Parameters. ACS APPLIED MATERIALS & INTERFACES 2023; 15:6868-6876. [PMID: 36695465 DOI: 10.1021/acsami.2c20370] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Surface hydroxyl groups on metal oxides play significant roles in catalyst synthesis and catalytic reactions. Despite the importance of surface hydroxyls in broader material applications, quantitative measurements of surface acid-base properties are not regularly reported. Here, we describe direct methods to quantify fundamental properties of surface hydroxyls on several titania- and alumina-based supports. Comparing commercially available anatase, rutile, P25, and P90 titania, thermogravimetric analysis (TGA) indicated that the total surface hydroxyl density varied by a factor of 2, and each surface hydroxyl is associated with approximately one weakly adsorbed water molecule. Proton-exchange site densities, determined at 25 °C with slurry acid-base titrations, led to several conclusions: (i) the intrinsic acidity/basicity of surface hydroxyls were similar regardless of the titania source; (ii) differences in the surface isoelectric point (IEP) were primarily attributable to differences in the surface concentration of acid and base sites; (iii) rutile has a higher surface concentration of basic hydroxyls, leading to a higher IEP; and (iv) P25 and P90 titania have slightly higher surface concentrationsof acidic hydroxyls relative to anatase or rutile. Temperature effects on surface acid-base properties are rarely reported yet are significant: from 5 to 65 °C, IEP values change by roughly one pH unit. The IEP changes were associated with large changes to the intrinsic acid-base equilibrium constants over this temperature range, rather than changes in the composition or concentration of the surface sites.
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Affiliation(s)
- Tae Yong Yun
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania16802, United States
| | - Bert D Chandler
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania16802, United States
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania16802, United States
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Tian Q, Wang X, Zhang W, Liao S, Hu C, Li J. Low-Temperature Production of Glyceric Acid from Biomass-Based Sugar via the Cooperative Roles of MgO and NaBF 4. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Qing Tian
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, PR China
| | - Xiaoyan Wang
- Analysis and Test Center, Sichuan University, Chengdu, Sichuan610064, PR China
| | - Wenyu Zhang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, PR China
| | - Shengqi Liao
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, PR China
| | - Changwei Hu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, PR China
| | - Jianmei Li
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan610064, PR China
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Gao W, Xiao J, Wang Q, Li S, Vasiliades MA, Huang L, Gao Y, Jiang Q, Niu Y, Zhang B, Liu Y, He H, Efstathiou AM. Unravelling the Mechanism of Intermediate-Temperature CO 2 Interaction with Molten-NaNO 3 -Salt-Promoted MgO. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106677. [PMID: 34729827 DOI: 10.1002/adma.202106677] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/29/2021] [Indexed: 06/13/2023]
Abstract
The optimization of MgO-based adsorbents as advanced CO2 -capture materials is predominantly focused on their molten-salt modification, for which theoretical and experimental contributions provide great insights for their high CO2 -capture performance. The underlying mechanism of the promotion effect of the molten salt on CO2 capture, however, is a topic of controversy. Herein, advanced experimental characterization techniques, including in situ environmental transmission electron microscopy (eTEM) and CO2 chemisorption by diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS), transient 18 O-isotopic exchange, and density functional theory (DFT), are employed to elucidate the mechanism of the CO2 interaction with molten-salt-modified MgO in the 250-400 °C range. Herein, eTEM studies using low (2-3 mbar) and high (700 mbar) CO2 pressures illustrate the dynamic evolution of the molten NaNO3 salt promoted and unpromoted MgO carbonation with high magnification (<50 nm). The formation of 18 O-NaNO3 (use of 18 O2 ) and C16 O18 O following CO2 interaction, verifies the proposed reaction path: conversion of NO3 - (NO3 - → NO2 + + O2- ), adsorption of NO2 + on MgO with significant weakening of CO2 adsorption strength, and formation of [Mg2+ … O2- ] ion pairs preventing the development of an impermeable MgCO3 shell, which largely increases the rate of bulk MgO carbonation.
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Affiliation(s)
- Wanlin Gao
- College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Beijing, 100083, P. R. China
| | - Jiewen Xiao
- College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Beijing, 100083, P. R. China
| | - Qiang Wang
- College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Beijing, 100083, P. R. China
| | - Shiyan Li
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Michalis A Vasiliades
- Chemistry Department, Heterogeneous Catalysis Lab, University of Cyprus, 1 University Ave., University Campus, Nicosia, 2109, Cyprus
| | - Liang Huang
- College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Beijing, 100083, P. R. China
| | - Yanshan Gao
- College of Environmental Science and Engineering, Beijing Forestry University, 35 Qinghua East Road, Beijing, 100083, P. R. China
| | - Qian Jiang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Yiming Niu
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, P. R. China
| | - Bingsen Zhang
- Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, P. R. China
| | - Yuefeng Liu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - Hong He
- Laboratory of Atmospheric Environment and Pollution Control, Research Center for EcoEnvironmental Sciences, Chinese Academy of Sciences, Beijing, 100085, P. R. China
| | - Angelos M Efstathiou
- Chemistry Department, Heterogeneous Catalysis Lab, University of Cyprus, 1 University Ave., University Campus, Nicosia, 2109, Cyprus
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Kurosawa R, Takeuchi M, Ryu J. Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide. RSC Adv 2021; 11:24292-24311. [PMID: 35479034 PMCID: PMC9039418 DOI: 10.1039/d1ra04290d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/05/2021] [Indexed: 11/21/2022] Open
Abstract
The magnesium hydroxide/magnesium oxide (Mg(OH)2/MgO) system is a promising chemical heat storage system that utilizes unused heat at the temperature range of 200–500 °C. We have previously reported that the addition of lithium chloride (LiCl) and/or lithium hydroxide (LiOH) promotes the dehydration of Mg(OH)2. The results revealed that LiOH primarily catalyzed the dehydration of the surface of Mg(OH)2, while LiCl promoted the dehydration of bulk Mg(OH)2. However, the roles of Li compounds in the hydration of MgO have not been discussed in detail. X-ray diffraction (XRD) and Fourier-transform infrared (FT-IR) techniques were used to analyze the effects of adding the Li compounds. The results revealed that the addition of LiOH promoted the diffusion of water into the MgO bulk phase and the addition of LiCl promoted the hydration of the MgO bulk phase. It was also observed that the concentration (number) of OH− affected hydration. The mechanism of hydration of pure and LiCl- (or LiOH)-added MgO has also been discussed. The effect of LiCl and LiOH on the hydration of MgO was investigated by XRD and FT-IR measurements, which can help to identify dopants that can effectively catalyze the Mg(OH)2 dehydration and MgO hydration processes.![]()
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Affiliation(s)
- Ryo Kurosawa
- Graduate School of Engineering, Chiba University 1-33, Yayoi-cho, Inage-ku Chiba Japan
| | - Masato Takeuchi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University 1-1, Gaku-en-cho, Naka-ku Sakai Osaka 599-8531 Japan
| | - Junichi Ryu
- Graduate School of Engineering, Chiba University 1-33, Yayoi-cho, Inage-ku Chiba Japan
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Peering into buried interfaces with X-rays and electrons to unveil MgCO 3 formation during CO 2 capture in molten salt-promoted MgO. Proc Natl Acad Sci U S A 2021; 118:2103971118. [PMID: 34140337 DOI: 10.1073/pnas.2103971118] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The addition of molten alkali metal salts drastically accelerates the kinetics of CO2 capture by MgO through the formation of MgCO3 However, the growth mechanism, the nature of MgCO3 formation, and the exact role of the molten alkali metal salts on the CO2 capture process remain elusive, holding back the development of more-effective MgO-based CO2 sorbents. Here, we unveil the growth mechanism of MgCO3 under practically relevant conditions using a well-defined, yet representative, model system that is a MgO(100) single crystal coated with NaNO3 The model system is interrogated by in situ X-ray reflectometry coupled with grazing incidence X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. When bare MgO(100) is exposed to a flow of CO2, a noncrystalline surface carbonate layer of ca. 7-Å thickness forms. In contrast, when MgO(100) is coated with NaNO3, MgCO3 crystals nucleate and grow. These crystals have a preferential orientation with respect to the MgO(100) substrate, and form at the interface between MgO(100) and the molten NaNO3 MgCO3 grows epitaxially with respect to MgO(100), and the lattice mismatch between MgCO3 and MgO is relaxed through lattice misfit dislocations. Pyramid-shaped pits on the surface of MgO, in proximity to and below the MgCO3 crystals, point to the etching of surface MgO, providing dissolved [Mg2+…O2-] ionic pairs for MgCO3 growth. Our studies highlight the importance of combining X-rays and electron microscopy techniques to provide atomic to micrometer scale insight into the changes occurring at complex interfaces under reactive conditions.
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Doudin N, Collinge G, Persaud RR, Gurunathan PK, Lee MS, Glezakou VA, Dixon DA, Rousseau R, Dohnálek Z. Binding and stability of MgO monomers on anatase TiO 2(101). J Chem Phys 2021; 154:204703. [PMID: 34241167 DOI: 10.1063/5.0047521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In catalysis, MgO is often used to modify the acid-base properties of support oxides and to stabilize supported metal atoms and particles on oxides. In this study, we show how the sublimation of MgO powder can be used to deposit MgO monomers, hither on anatase TiO2(101). A combination of x-ray electron spectroscopy, high-resolution scanning tunneling microscopy, and density functional theory is employed to gain insight into the MgO monomer binding, electronic and vibrational properties, and thermal stability. In the most stable configuration, the Mg and O of the MgO monomer bind to two surface oxygens and one undercoordinated surface titanium, respectively. The additional binding weakens the Mg-O monomer bond and makes Mg more ionic. The monomers are thermally stable up to 600 K, where the onset of diffusion into the TiO2 bulk is observed. The monomeric MgO species on TiO2(101) represent an ideal atomically precise system with modified acid-base properties and will be employed in our future catalytic studies.
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Affiliation(s)
- Nassar Doudin
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Greg Collinge
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Rudradatt R Persaud
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, USA
| | - Pradeep Kumar Gurunathan
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Mal-Soon Lee
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Vassiliki-Alexandra Glezakou
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, USA
| | - Roger Rousseau
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
| | - Zdenek Dohnálek
- Pacific Northwest National Laboratory, Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, P.O. Box 999, Richland, Washington 99352, USA
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Muñiz Diaz R, Cardoso-Avila PE, Pérez Tavares JA, Patakfalvi R, Villa Cruz V, Pérez Ladrón de Guevara H, Gutiérrez Coronado O, Arteaga Garibay RI, Saavedra Arroyo QE, Marañón-Ruiz VF, Castañeda Contreras J. Two-Step Triethylamine-Based Synthesis of MgO Nanoparticles and Their Antibacterial Effect against Pathogenic Bacteria. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:410. [PMID: 33562669 PMCID: PMC7914904 DOI: 10.3390/nano11020410] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 12/13/2022]
Abstract
Magnesium oxide nanoparticles (MgO NPs) were obtained by the calcination of precursor microparticles (PM) synthesized by a novel triethylamine-based precipitation method. Scanning electron microscopy (SEM) revealed a mean size of 120 nm for the MgO NPs. The results of the characterizations for MgO NPs support the suggestion that our material has the capacity to attack, and have an antibacterial effect against, Gram-negative and Gram-positive bacteria strains. The ability of the MgO NPs to produce reactive oxygen species (ROS), such as superoxide anion radicals (O2•-) or hydrogen peroxide (H2O2), was demonstrated by the corresponding quantitative assays. The MgO antibacterial activity was evaluated against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria, with minimum inhibitory concentrations (MICs) of 250 and 500 ppm on the microdilution assays, respectively. Structural changes in the bacteria, such as membrane collapse; surface changes, such as vesicular formation; and changes in the longitudinal and horizontal sizes, as well as the circumference, were observed using atomic force microscopy (AFM). The lipidic peroxidation of the bacterial membranes was quantified, and finally, a bactericidal mechanism for the MgO NPs was also proposed.
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Affiliation(s)
- Ramiro Muñiz Diaz
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | | | - José Antonio Pérez Tavares
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Rita Patakfalvi
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Virginia Villa Cruz
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Héctor Pérez Ladrón de Guevara
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Oscar Gutiérrez Coronado
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Ramón Ignacio Arteaga Garibay
- Centro Nacional de Recursos Genéticos, Instituto Nacional de Investigación Forestal, Agrícola y Pecuaria, Tepatitlán de Morelos 47600, Mexico;
| | | | - Virginia Francisca Marañón-Ruiz
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
| | - Jesús Castañeda Contreras
- Centro Universitario de los Lagos, Universidad de Guadalajara, Lagos de Moreno 47460, Mexico; (R.M.D.); (J.A.P.T.); (V.V.C.); (H.P.L.d.G.); (O.G.C.); (V.F.M.-R.); (J.C.C.)
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14
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Degler D, Junker B, Allmendinger F, Weimar U, Barsan N. Investigations on the Temperature-Dependent Interaction of Water Vapor with Tin Dioxide and Its Implications on Gas Sensing. ACS Sens 2020; 5:3207-3216. [PMID: 32914615 DOI: 10.1021/acssensors.0c01493] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This work presents an operando infrared spectroscopic study of the temperature-dependent water adsorption on pristine SnO2 surfaces and discusses the possible implications on the oxygen ionosorption and gas-sensing mechanism. The impact of water on the sensor resistance, CO-sensing performance, and CO conversion was studied, and the obtained phenomenological results provide the basis for discussing the operando spectroscopic investigation findings. The provided information allows identification of three different water adsorption regimes ranging from physisorption and dominant associative adsorption to mainly dissociative water adsorption. In these regions, water has different impacts on the surface composition, sensor resistance, and gas-sensing performance.
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Affiliation(s)
- David Degler
- Faculty of Industrial Technologies, Furtwangen University, D-78532 Tuttlingen, Germany
| | - Benjamin Junker
- Institute of Physical and Theoretical Chemistry and Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tübingen, D-72076 Tübingen, Germany
| | - Frank Allmendinger
- Faculty of Industrial Technologies, Furtwangen University, D-78532 Tuttlingen, Germany
| | - Udo Weimar
- Institute of Physical and Theoretical Chemistry and Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tübingen, D-72076 Tübingen, Germany
| | - Nicolae Barsan
- Institute of Physical and Theoretical Chemistry and Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tübingen, D-72076 Tübingen, Germany
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15
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Zeng T, Sun G, Miao C, Yan G, Ye Y, Yang W, Sautet P. Stabilizing Oxidative Dehydrogenation Active Sites at High Temperature with Steam: ZnFe2O4-Catalyzed Oxidative Dehydrogenation of 1-Butene to 1,3-Butadiene. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tieqiang Zeng
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles 90095, California, United States
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
| | - Geng Sun
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles 90095, California, United States
| | - Changxi Miao
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
| | - George Yan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles 90095, California, United States
| | - Yingchun Ye
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
| | - Weimin Yang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles 90095, California, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles 90095, California, United States
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16
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Comparative study on the activities of different MgO surfaces in CO2 activation and hydrogenation. Catal Today 2020. [DOI: 10.1016/j.cattod.2020.03.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Sato K, Kamaya M. Origin of enhanced boric acid adsorption in light-burned magnesium oxide. J Chem Phys 2020; 153:124704. [PMID: 33003747 DOI: 10.1063/5.0025455] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Light-burned magnesium oxide (MgO) possesses a high surface area and has attracted interest as a promising candidate for boron adsorption materials; however, the detailed molecular structures decisive for enhancing the adsorption performance have not yet been elucidated. Here, the origin of enhanced boric acid adsorption for the light-burned MgO is studied by multiple probes, including positronium (Ps) annihilation spectroscopy, Fourier transform infrared spectroscopy, and sorption experiments coupled with molecular simulations. The state-of-the-art technique of open space analysis using Ps revealed the detailed structure of the interfaces between MgO nanograins: ∼10 Å and ∼30 Å open spaces, participating in the chemisorption of B(OH)4 - and BO3 3- simultaneously with the physisorption of neutral B(OH)3 molecules. Furthermore, in addition to the fraction of open spaces, a proton quasi-layer formed on the interior surfaces of the above-mentioned angstrom-scale open spaces was identified to be attributable for enhancing both the chemisorption and physisorption.
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Affiliation(s)
- Kiminori Sato
- Department of Environmental Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
| | - Minori Kamaya
- Department of Applied Chemistry, Kogakuin University, Hachioji, Tokyo 192-0015, Japan
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18
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Witzke RJ, Chapovetsky A, Conley MP, Kaphan DM, Delferro M. Nontraditional Catalyst Supports in Surface Organometallic Chemistry. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03350] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryan J. Witzke
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Alon Chapovetsky
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Matthew P. Conley
- Department of Chemistry, University of California, Riverside, Riverside, California 92521, United States
| | - David M. Kaphan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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19
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Bula K, Kubicki G, Kubiak A, Jesionowski T, Klapiszewski Ł. Influence of MgO-Lignin Dual Component Additives on Selected Properties of Low Density Polyethylene. Polymers (Basel) 2020; 12:polym12051156. [PMID: 32443627 PMCID: PMC7284739 DOI: 10.3390/polym12051156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 05/14/2020] [Accepted: 05/16/2020] [Indexed: 11/16/2022] Open
Abstract
The presented study describes the application of lignin-based dual component fillers into low-density polyethylene (LDPE) and an examination of their selected properties. The main experimental procedure was focused on the preparation of thin sheet films using polyethylene and its composites with 5% by wt. of fillers: MgO, MgO-lignin dual phase systems with varying amounts of lignin and pristine lignin. Analysis of morphology revealed that elongated voids appeared in the structure for hybrid filler with a higher content of lignin (min. 50% by wt. of lignin versus MgO) and also for pristine lignin. Moreover, the prepared sheets were subjected to the thermoforming process by using the positive forming method (male mold). The thermoforming ability of all composites was evaluated by means of a comparison of wall thickness distribution on thermoformed shapes. The most noticeable percentage of wall thinning occurred for films which consisted of LDPE/MgO-lignin (5:1 wt./wt.) composite. In contrast, the best material arrangement and the highest mean percentage wall thickness were observed in the case of the shape formed with LDPE/MgO-lignin (1:5 wt./wt.). In addition, as part of research studies, the measurements of the contact angle have been conducted. The analysed LDPE films, in particular LDPE/MgO-L, have been recognized as materials with high wettability.
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Affiliation(s)
- Karol Bula
- Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, PL-60965 Poznan, Poland;
- Correspondence: (K.B.); (Ł.K.); Tel.: +48-61-665-2895 (K.B.); +48-61-665-3748 (Ł.K.)
| | - Grzegorz Kubicki
- Institute of Materials Technology, Faculty of Mechanical Engineering, Poznan University of Technology, PL-60965 Poznan, Poland;
| | - Adam Kubiak
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, PL-60965 Poznan, Poland; (A.K.); (T.J.)
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, PL-60965 Poznan, Poland; (A.K.); (T.J.)
| | - Łukasz Klapiszewski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, PL-60965 Poznan, Poland; (A.K.); (T.J.)
- Correspondence: (K.B.); (Ł.K.); Tel.: +48-61-665-2895 (K.B.); +48-61-665-3748 (Ł.K.)
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20
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Niedermaier M, Schwab T, Kube P, Zickler GA, Trunschke A, Diwald O. Catalytic activity, water formation, and sintering: Methane activation over Co- and Fe-doped MgO nanocrystals. J Chem Phys 2020; 152:074713. [PMID: 32087664 DOI: 10.1063/1.5138894] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Microstructure, structure, and compositional homogeneity of metal oxide nanoparticles can change dramatically during catalysis. Considering the different stabilities of cobalt and iron ions in the MgO host lattice [M. Niedermaier et al., J. Phys. Chem. C 123, 25991 (2019)], we employed MgO nanocube powders with or without transition metal admixtures for the oxidative coupling of methane (OCM) reaction to analyze characteristic differences in catalytic activity and sintering behavior. Undoped MgO nanocrystals exhibit the highest C2 selectivity and retain the nanocrystallinity of the starting material after 24 h time on stream. For the Co-Mg-O nanoparticle powder, which exhibits the highest activity and COx selectivity and where OCM-induced coarsening is strongest, we found that the Co2+ ions remain homogeneously distributed over the MgO lattice. Trivalent Fe ions migrate to the surface of Fe-Mg-O nanoparticles where they form a magnesioferrite phase (MgFe2O4) with a characteristic impact on catalytic performance: Fe-Mg-O is initially less selective than MgO despite its lower activity. An increase in C2 selectivity and a decrease in the CO2/CO ratio with time on stream are attributed to the increasing fraction of coarsened particles that become depleted in redox active Fe. Surface water is a by-product of the OCM reaction, favors mass transport across the particle surfaces, and serves as a sintering aid during catalysis. The characteristic changes in size and morphology of MgO, Co-doped, and Fe-doped MgO particles can be consistently explained by activity and C2 selectivity trends. The original morphology of the nanocubes as a starting material for the OCM reaction does not impact the catalytic activity.
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Affiliation(s)
- Matthias Niedermaier
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Thomas Schwab
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Pierre Kube
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Gregor A Zickler
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
| | - Annette Trunschke
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Oliver Diwald
- Department of Chemistry and Physics of Materials, Paris-Lodron University Salzburg, Jakob-Haringer-Strasse 2a, A-5020 Salzburg, Austria
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21
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Kurosawa R, Takeuchi M, Ryu J. Comparison of the Effect of Coaddition of Li Compounds and Addition of a Single Li Compound on Reactivity and Structure of Magnesium Hydroxide. ACS OMEGA 2019; 4:17752-17761. [PMID: 31681881 PMCID: PMC6822115 DOI: 10.1021/acsomega.9b02189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 10/04/2019] [Indexed: 06/10/2023]
Abstract
Mg(OH)2 is a chemical heat storage material that is studied for the utilization of 300-350 °C waste heat. In this study, LiCl and LiOH were coadded to Mg(OH)2, and the reactivity and structural evolution were investigated. In the hydration of samples at 200 °C subsequent to dehydration at 270 °C, Mg(OH)2 with coadded LiCl and LiOH showed excellent hydration reactivity, with a heat output density of 1053 kJ kg-1. The coaddition of LiCl and LiOH enhanced both the dehydration and the hydration reactivity of Mg(OH)2. X-ray diffraction analysis indicated that the addition of LiOH to Mg(OH)2 promoted the decomposition of Mg(OH)2 and the diffusion of water on the surface of Mg(OH)2, whereas the addition of LiCl to Mg(OH)2 promoted these processes in the bulk phase of Mg(OH)2.
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Affiliation(s)
- Ryo Kurosawa
- Graduate School
of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Masato Takeuchi
- Department of Applied Chemistry,
Graduate School of Engineering, Osaka Prefecture
University, 1-1, Gaku-en-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Junichi Ryu
- Graduate School
of Engineering, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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22
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Yan G, Wähler T, Schuster R, Schwarz M, Hohner C, Werner K, Libuda J, Sautet P. Water on Oxide Surfaces: A Triaqua Surface Coordination Complex on Co3O4(111). J Am Chem Soc 2019; 141:5623-5627. [DOI: 10.1021/jacs.9b00898] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- George Yan
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Tobias Wähler
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Ralf Schuster
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Matthias Schwarz
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Chantal Hohner
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Kristin Werner
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
| | - Jörg Libuda
- Lehrstuhl für Physikalische Chemie II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany
- Erlangen Catalysis Resource Center and Interdisciplinary Center for Interface-Controlled Processes, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Philippe Sautet
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
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23
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Jusys Z, Schnaidt J, Behm RJ. O 2 reduction on a Au film electrode in an ionic liquid in the absence and presence of Mg 2+ ions: Product formation and adlayer dynamics. J Chem Phys 2019; 150:041724. [PMID: 30709319 DOI: 10.1063/1.5051982] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aiming at a detailed understanding of the interaction between an ionic liquid, O2, and electrodes in Mg-air batteries, we performed a combined differential electrochemical mass spectrometry and in situ infrared spectroscopy model study on the interaction between the ionic liquid (IL) 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide (BMP-TFSI) and a gold film electrode in the presence and absence of O2 and Mg2+ ions in the potential range relevant for the oxygen reduction reaction (ORR) and evolution reaction. Detailed information on the dynamic exchange of adsorbed ions, on the stability/decomposition of the ionic liquid, and on the activity/selectivity/reversibility of the ORR is derived from measurements performed under potentiodynamic and potentiostatic conditions. In neat BMP-TFSI, we find the dynamics of the potential induced exchange of adsorbed ions to depend significantly on the exchange direction. In the presence of O2, the anions formed in the ORR distinctly affect the adsorption characteristics of the IL ions and the exchange dynamics. Furthermore, the ORR changes from reduction to superoxide anions at moderate potentials to reduction to peroxide anion at more negative potentials. In the additional presence of Mg2+ ions, dominant magnesium peroxide and oxide formation result in an irreversible ORR, in contrast to the requirements of an efficient re-chargeable Mg-air battery. In addition, these ions result in the increasing formation of a blocking adlayer, reducing the coverage of adsorbed IL species.
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Affiliation(s)
- Zenonas Jusys
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
| | - Johannes Schnaidt
- Helmholtz Institute Ulm (HIU) Electrochemical Energy Storage, Helmholtzstr. 11, D-89081 Ulm, Germany
| | - R Jürgen Behm
- Institute of Surface Chemistry and Catalysis, Ulm University, Albert-Einstein-Allee 47, D-89081 Ulm, Germany
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24
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Taifan WE, Li Y, Baltrus JP, Zhang L, Frenkel AI, Baltrusaitis J. Operando Structure Determination of Cu and Zn on Supported MgO/SiO2 Catalysts during Ethanol Conversion to 1,3-Butadiene. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03515] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- William E. Taifan
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States
| | - Yuanyuan Li
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - John P. Baltrus
- National Energy Technology Laboratory, U.S. Department of Energy, 626 Cochrans Mill Road, Pittsburgh, Pennsylvania 15236, United States
| | - Lihua Zhang
- Brookhaven National Laboratory, Center for Functional Nanomaterials, Upton, New York 11973, United States
| | - Anatoly I. Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Division of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States
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25
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Anicˇić N, Vukomanović M, Koklicˇ T, Suvorov D. Fewer Defects in the Surface Slows the Hydrolysis Rate, Decreases the ROS Generation Potential, and Improves the Non-ROS Antimicrobial Activity of MgO. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800205. [PMID: 29782697 DOI: 10.1002/smll.201800205] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Magnesium oxide (MgO) is recognised as exhibiting a contact-based antibacterial activity. However, a comprehensive study of the impact of atomic-scale surface features on MgO's antibacterial activity is lacking. In this study, the nature and abundance of the native surface defects on different MgO powders are thoroughly investigated. Their impacts on the hydrolysis kinetics, antibacterial activity against Escherichia coli (ATCC 47076), Staphylococcus epidermidis and Pseudomonas aeruginosa and the reactive oxygen species (ROS) generation potential are determined and explained. It is shown that a reduction in the abundance of low-coordinated oxygen atoms on the surface of the MgO improves its resistance to both hydrolysis and antibacterial activity. The ROS generation potential, determined in-situ using a fluorescence microplate assay and electron paramagnetic resonance spectroscopy, is not an inherent property of the studied MgO, rather it is a side product of hydrolysis (only for the most highly defected MgO particles) and/or a consequence of the MgO/bacteria interaction. The evaluation of the mutual correlations of the hydrolysis, the antibacterial activity and the ROS generation, with their origin in the surface defects' peculiarities, led to the conclusion that the acid/base reaction between the MgO surface and the bacterial wall contributes considerably to the MgO's antibacterial activity.
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Affiliation(s)
- Nemanja Anicˇić
- Advanced Materials Department, Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Marija Vukomanović
- Advanced Materials Department, Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Tilen Koklicˇ
- Laboratory for Biophysics, Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Danilo Suvorov
- Advanced Materials Department, Jozef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
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26
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Hung CH, Chen CS, Sheu HS, Chang JR. Deactivation and Rejuvenation of Pellet MgO/SiO2 Catalysts for Transesterification of Soybean Oil with Methanol to Biodiesel: Roles of MgO Morphology Change in Catalysis. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b02859] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chien-Hsiu Hung
- Department
of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan
| | - Chin-Shuh Chen
- Department
of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan
| | - Hwo-Shuenn Sheu
- National Synchrotron
Radiation Research Center, Hsinchu 300, Taiwan
| | - Jen-Ray Chang
- Department
of Chemical Engineering, National Chung Cheng University, Chia-Yi 621, Taiwan
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27
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Olivier-Bourbigou H, Chizallet C, Dumeignil F, Fongarland P, Geantet C, Granger P, Launay F, Löfberg A, Massiani P, Maugé F, Ouali A, Roger AC, Schuurman Y, Tanchoux N, Uzio D, Jérôme F, Duprez D, Pinel C. The Pivotal Role of Catalysis in France: Selected Examples of Recent Advances and Future Prospects. ChemCatChem 2017. [DOI: 10.1002/cctc.201700426] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Céline Chizallet
- Catalysis and Separation Division; IFP Energies nouvelles; F-69360 Solaize France
| | - Franck Dumeignil
- Unité de Catalyse et Chimie du Solide; Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; F-59000 Lille France
| | - Pascal Fongarland
- Laboratoire de Génie des Procédés Catalytiques (LGPC); Univ. Lyon, Université Claude Bernard Lyon 1, CPE, CNRS; F-69616 Villeurbanne France
| | - Christophe Geantet
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON); Université Claude Bernard Lyon 1, CNRS; F-69626 Villeurbanne France
| | - Pascal Granger
- Unité de Catalyse et Chimie du Solide; Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; F-59000 Lille France
| | - Franck Launay
- Laboratoire de Réactivité de Surface (LRS); Sorbonne Universités, UPMC Univ Paris 06, CNRS; F-75005 Paris France
| | - Axel Löfberg
- Unité de Catalyse et Chimie du Solide; Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois; F-59000 Lille France
| | - Pascale Massiani
- Laboratoire de Réactivité de Surface (LRS); Sorbonne Universités, UPMC Univ Paris 06, CNRS; F-75005 Paris France
| | - Françoise Maugé
- Laboratoire Catalyse et Spectrochimie (LCS); ENSICAEN, CNRS; F-14000 Caen France
| | - Armelle Ouali
- Institut Charles Gerhardt Montpellier (ICGM); Université Montpellier, CNRS; F-34095 Montpellier France
| | - Anne-Cécile Roger
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES); Université de Strasbourg, CNRS; F-67087 Strasbourg France
| | - Yves Schuurman
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON); Université Claude Bernard Lyon 1, CNRS; F-69626 Villeurbanne France
| | - Nathalie Tanchoux
- Institut Charles Gerhardt Montpellier (ICGM); Université Montpellier, CNRS; F-34095 Montpellier France
| | - Denis Uzio
- Catalysis and Separation Division; IFP Energies nouvelles; F-69360 Solaize France
| | - François Jérôme
- Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP); Université de Poitiers, ENSIP, CNRS; F-86073 Poitiers France
| | - Daniel Duprez
- Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP); Université de Poitiers, ENSIP, CNRS; F-86073 Poitiers France
| | - Catherine Pinel
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON); Université Claude Bernard Lyon 1, CNRS; F-69626 Villeurbanne France
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28
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Iwanek E, Ulkowska U, Gliński M. Magnesium oxide modified with various iodine-containing compounds--Surface studies. SURF INTERFACE ANAL 2017. [DOI: 10.1002/sia.6248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Ewa Iwanek
- Faculty of Applied Science and Technology; Sheridan College; 7899 McLaughlin Rd Oakville Ontario Canada
| | - Urszula Ulkowska
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 Warsaw Poland
| | - Marek Gliński
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 Warsaw Poland
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29
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Lin L, Cornu D, Mounir Daou M, Domingos C, Herledan V, Krafft JM, Laugel G, Millot Y, Lauron-Pernot H. Role of Water on the Activity of Magnesium Silicate for Transesterification Reactions. ChemCatChem 2017. [DOI: 10.1002/cctc.201700139] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Longfei Lin
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Damien Cornu
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
- Present address: Foundation ICIQ; Avda. Països Catalans, 16 43007 Tarragona Spain
| | - Maya Mounir Daou
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Cyril Domingos
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Virginie Herledan
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Jean-Marc Krafft
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Guillaume Laugel
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Yannick Millot
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
| | - Hélène Lauron-Pernot
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7197, Laboratoire de Réactivité de Surface; 4 Place Jussieu F-75252 Paris France
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30
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Koju NK, Song X, Wang Q. Effective remediation of low-concentration cadmium in groundwater using nano-scale magnesia. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10819-10832. [PMID: 28290088 DOI: 10.1007/s11356-017-8697-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 02/27/2017] [Indexed: 06/06/2023]
Abstract
Cadmium (Cd), one of the hazardous elements in groundwater, is a severe threat to human health and ecological systems even at low concentrations. This study explores the effectiveness of commercial and self-synthesized nano-scale magnesia (NMgO) for remediating low-concentration Cd in groundwater as well as their associated removal mechanisms. The sorption kinetic data for both NMgOs were well fitted to the pseudo-second-order model and the calculated q e values matched the experimental q e values for both commercial and self-synthesized NMgOs. The sorption equilibrium data for both NMgOs were well fitted to the Langmuir isotherm model, with the maximum Cd sorption capacity (q e) of 19.25 and 16.54 mg/g at an initial concentration range of 5-200 μg/L and a temperature of 25 °C, for commercial and self-synthesized NMgOs, respectively. The combined sorption kinetics and equilibrium data suggest that the sorption onto both NMgOs follows a monolayer chemisorption. The scanning electron microscope-energy dispersive X-ray (SEM-EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray diffractometer (XRD) analyses show that the chemisorption of Cd onto commercial NMgO is due to the formation of Cd(OH)2, which precipitates on the sorbent surface. For the self-synthesized NMgO, it was demonstrated that the hydroxyl group plays a role in the chemisorption process and the amount of Cd sorbed on the sorbent was quantified. The results of batch experiments showed that both NMgOs removed Cd effectively, obtaining a removal efficiency of more than 99%, under different experimental conditions of pH, sorbent dosage, co-existing ions, and simulated groundwater. Results from both the sorption isotherm and desorption experiments indicated strong bonding between Cd and both NMgOs, suggesting that NMgOs are safe, effective, and practical sorbents to remediate Cd in groundwater.
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Affiliation(s)
- Neel Kamal Koju
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 21008, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Song
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 21008, China.
| | - Qing Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 21008, China
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31
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Lamiel-Garcia O, Cuko A, Calatayud M, Illas F, Bromley ST. Predicting size-dependent emergence of crystallinity in nanomaterials: titania nanoclusters versus nanocrystals. NANOSCALE 2017; 9:1049-1058. [PMID: 27809322 DOI: 10.1039/c6nr05788h] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bottom-up and top-down derived nanoparticle structures refined by accurate ab initio calculations are used to investigate the size dependent emergence of crystallinity in titania from the monomer upwards. Global optimisation and data mining are used to provide a series of (TiO2)N global minima candidates in the range N = 1-38, where our approach provides many new low energy structures for N > 10. A range of nanocrystal cuts from the anatase crystal structure are also considered up to a size of over 250 atoms. All nanocrystals considered are predicted to be metastable with respect to non-crystalline nanoclusters, which has implications with respect to the limitations of the cluster approach to modelling large titania nanosystems. Extrapolating both data sets using a generalised expansion of a top-down derived energy expression for nanoparticles, we obtain an estimate of the non-crystalline to crystalline crossover size for titania. Our results compare well with the available experimental results and imply that anatase-like crystallinity emerges in titania nanoparticles of approximately 2-3 nm diameter.
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Affiliation(s)
- Oriol Lamiel-Garcia
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Andi Cuko
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain and SorbonneUniversités, UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4, place Jussieu F. 75252, Paris Cedex 05, France
| | - Monica Calatayud
- SorbonneUniversités, UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4, place Jussieu F. 75252, Paris Cedex 05, France and InstitutUniversitaire de France, France
| | - Francesc Illas
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Stefan T Bromley
- Departament de Ciència de Materials i Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, E-08028 Barcelona, Spain and Institució Catalana de Recerca i Estudis Avançats (ICREA), E-08010 Barcelona, Spain.
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32
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Taifan WE, Yan GX, Baltrusaitis J. Surface chemistry of MgO/SiO2 catalyst during the ethanol catalytic conversion to 1,3-butadiene: in-situ DRIFTS and DFT study. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01556a] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,3-Butadiene is an important commodity chemical and new, selective routes of catalytic synthesis using green feedstocks, such as ethanol, is of interest.
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Affiliation(s)
- William E. Taifan
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
| | - George X. Yan
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
| | - Jonas Baltrusaitis
- Department of Chemical and Biomolecular Engineering
- Lehigh University
- Bethlehem
- USA
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33
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Cui Y, Li Z, Zhao Z, Cybulskis VJ, Sabnis KD, Han CW, Ortalan V, Schneider WF, Greeley J, Delgass WN, Ribeiro FH. Participation of interfacial hydroxyl groups in the water-gas shift reaction over Au/MgO catalysts. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01020f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
OH at 3750 cm−1 reacts with CO only in the presence of Au, indicating the importance of the Au/MgO interface.
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34
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Armaghan M, Amini MM. Adsorption of diazinon and fenitrothion on nanocrystalline magnesium oxides. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2014.01.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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35
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Hoffman AS, Fang CY, Gates BC. Homogeneity of Surface Sites in Supported Single-Site Metal Catalysts: Assessment with Band Widths of Metal Carbonyl Infrared Spectra. J Phys Chem Lett 2016; 7:3854-3860. [PMID: 27617702 DOI: 10.1021/acs.jpclett.6b01825] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Determining and controlling the uniformity of isolated metal sites on surfaces of supports are central goals in investigations of single-site catalysts because well-defined species provide opportunities for fundamental understanding of the surface sites. CO is a useful probe of surface metal sites, often reacting with them to form metal carbonyls, the infrared spectra of which provide insights into the nature of the sites and the metal-support interface. Metals bonded to various support surface sites give broad bands in the spectra, and when narrow bands are observed, they indicate a high degree of uniformity of the metal sites. Much recent work on single-site catalysts has been done with supports that are inherently nonuniform, giving supported metal species that are therefore nonuniform. Herein we summarize values of νCO data characterizing supported iridium gem-dicarbonyls, showing that the most nearly uniform of them are those supported on zeolites and the least uniform are those supported on metal oxides. Guided by νCO data of supported iridium gem-dicarbonyls, we have determined new, general synthesis methods to maximize the degree of uniformity of iridium species on zeolites and on MgO. We report results for a zeolite HY-supported iridium gem-dicarbonyl with full width at half-maximum values of only 4.6 and 5.2 cm-1 characterizing the symmetric and asymmetric CO stretches and implying that this is the most nearly uniform supported single-site metal catalyst.
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Affiliation(s)
- Adam S Hoffman
- Department of Chemical Engineering and ‡Department of Materials Science and Engineering, University of California at Davis , Davis, California 95616, United States
| | - Chia-Yu Fang
- Department of Chemical Engineering and ‡Department of Materials Science and Engineering, University of California at Davis , Davis, California 95616, United States
| | - Bruce C Gates
- Department of Chemical Engineering and ‡Department of Materials Science and Engineering, University of California at Davis , Davis, California 95616, United States
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36
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EPR and DFT study of the ethylene reaction with O− radicals on the surface of nanocrystalline MgO. RESEARCH ON CHEMICAL INTERMEDIATES 2016. [DOI: 10.1007/s11164-016-2682-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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37
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Hanif A, Dasgupta S, Nanoti A. Facile Synthesis of High-Surface-Area Mesoporous MgO with Excellent High-Temperature CO2 Adsorption Potential. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00647] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aamir Hanif
- Academy of Scientific and
Innovative Research and Adsorption and Membrane
Separation Laboratory, Council of Scientific and Industrial Research , Indian Institute of Petroleum Campus (CSIR-IIP), Dehradun 248005, India
| | - Soumen Dasgupta
- Academy of Scientific and
Innovative Research and Adsorption and Membrane
Separation Laboratory, Council of Scientific and Industrial Research , Indian Institute of Petroleum Campus (CSIR-IIP), Dehradun 248005, India
| | - Anshu Nanoti
- Academy of Scientific and
Innovative Research and Adsorption and Membrane
Separation Laboratory, Council of Scientific and Industrial Research , Indian Institute of Petroleum Campus (CSIR-IIP), Dehradun 248005, India
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38
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Yang D, Xu P, Guan E, Browning ND, Gates BC. Rhodium pair-sites on magnesium oxide: Synthesis, characterization, and catalysis of ethylene hydrogenation. J Catal 2016. [DOI: 10.1016/j.jcat.2016.02.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Copéret C, Comas-Vives A, Conley MP, Estes DP, Fedorov A, Mougel V, Nagae H, Núñez-Zarur F, Zhizhko PA. Surface Organometallic and Coordination Chemistry toward Single-Site Heterogeneous Catalysts: Strategies, Methods, Structures, and Activities. Chem Rev 2016; 116:323-421. [PMID: 26741024 DOI: 10.1021/acs.chemrev.5b00373] [Citation(s) in RCA: 490] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Matthew P Conley
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Deven P Estes
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Alexey Fedorov
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Victor Mougel
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Haruki Nagae
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,Department of Chemistry, Graduate School of Engineering Science, Osaka University, CREST , Toyonaka, Osaka 560-8531, Japan
| | - Francisco Núñez-Zarur
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland
| | - Pavel A Zhizhko
- Department of Chemistry and Applied Biosciences, ETH Zürich , Vladimir Prelog Weg 1-5, CH-8093 Zürich, Switzerland.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov str. 28, 119991 Moscow, Russia
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40
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Furukawa S, Ehara K, Komatsu T. Unique reaction mechanism of preferential oxidation of CO over intermetallic Pt3Co catalysts: surface-OH-mediated formation of a bicarbonate intermediate. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01652e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A unique and novel reaction mechanism for the preferential oxidation of CO involving surface-OH-derived bicarbonate as an intermediate is reported.
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Affiliation(s)
| | - Kengo Ehara
- Department of Chemistry
- Tokyo Institute of Technology
- Japan
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41
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Du FP, Yang W, Zhang F, Tang CY, Liu SP, Yin L, Law WC. Enhancing the Heat Transfer Efficiency in Graphene-Epoxy Nanocomposites Using a Magnesium Oxide-Graphene Hybrid Structure. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14397-14403. [PMID: 26075677 DOI: 10.1021/acsami.5b03196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Composite materials, such as organic matrices doped with inorganic fillers, can generate new properties that exhibit multiple functionalities. In this paper, an epoxy-based nanocomposite that has a high thermal conductivity and a low electrical conductivity, which are required for the use of a material as electronic packaging and insulation, was prepared. The performance of the epoxy was improved by incorporating a magnesium oxide-coated graphene (MgO@GR) nanomaterial into the epoxy matrix. We found that the addition of a MgO coating not only improved the dispersion of the graphene in the matrix and the interfacial bonding between the graphene and epoxy but also enhanced the thermal conductivity of the epoxy while preserving the electrical insulation. By adding 7 wt % MgO@GR, the thermal conductivity of the epoxy nanocomposites was enhanced by 76% compared with that of the neat epoxy, and the electrical resistivity was maintained at 8.66 × 10(14) Ω m.
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Affiliation(s)
- Fei-Peng Du
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Wen Yang
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Fang Zhang
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Chak-Yin Tang
- ‡Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Sheng-Peng Liu
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Le Yin
- †School of Materials Science and Engineering and Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
| | - Wing-Cheung Law
- ‡Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
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42
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Janssens W, Makshina EV, Vanelderen P, De Clippel F, Houthoofd K, Kerkhofs S, Martens JA, Jacobs PA, Sels BF. Ternary Ag/MgO-SiO2 catalysts for the conversion of ethanol into butadiene. CHEMSUSCHEM 2015; 8:994-1008. [PMID: 25410420 DOI: 10.1002/cssc.201402894] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/16/2014] [Indexed: 06/04/2023]
Abstract
Ternary Ag/Magnesia-silica catalysts were tested in the direct synthesis of 1,3-butadiene from ethanol. The influence of the silver content and the type of silica source on catalytic performance has been studied. Prepared catalysts were characterized by (29) Si NMR, N2 sorption, small-angle X-ray scattering measurements, XRD, environmental scanning electron microscopy with energy dispersive X-ray analysis (ESEM/EDX), FTIR spectroscopy of adsorbed pyridine and CO2 , temperature-programmed desorption of CO2 and UV/Vis diffuse reflectance spectroscopy. Based on these characterization results, the catalytic performance of the catalysts in the 1,3-butadiene formation process was interpreted and a tentative model explaining the role of the different catalytically active sites was elaborated. The balance of the active sites is crucial to obtain an active and selective catalyst to form 1,3-butadiene from ethanol. The optimal silver loading is 1-2 wt% on a MgO-silica support with a molar Mg/Si ratio of 2. The silver species and basic sites (Mg−O pairs and basic OH groups) are of prime importance in the 1,3-butadiene production, catalyzing mainly the ethanol dehydrogenation and the aldol condensation, respectively.
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Affiliation(s)
- Wout Janssens
- Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg 23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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43
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Vitillo JG. Magnesium-based systems for carbon dioxide capture, storage and recycling: from leaves to synthetic nanostructured materials. RSC Adv 2015. [DOI: 10.1039/c5ra02835c] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Magnesium is used as leitmotif in this review in order to explore the systems involved in natural and artificial CO2 cycles.
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Affiliation(s)
- Jenny G. Vitillo
- Department of Science and High Technology
- Università dell'Insubria
- 22100 Como
- Italy
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44
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Cornu D, Guesmi H, Laugel G, Krafft JM, Lauron-Pernot H. On the relationship between the basicity of a surface and its ability to catalyze transesterification in liquid and gas phases: the case of MgO. Phys Chem Chem Phys 2015; 17:14168-76. [DOI: 10.1039/c5cp00217f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The influence of the basic properties of MgO is not the same for liquid and for gas phase transesterification.
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Affiliation(s)
- Damien Cornu
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Ivry sur Seine
| | - Hazar Guesmi
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Ivry sur Seine
| | - Guillaume Laugel
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Ivry sur Seine
| | - Jean-Marc Krafft
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Ivry sur Seine
| | - Hélène Lauron-Pernot
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Ivry sur Seine
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45
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Petitjean H, Guesmi H, Lauron-Pernot H, Costentin G, Loffreda D, Sautet P, Delbecq F. How Surface Hydroxyls Enhance MgO Reactivity in Basic Catalysis: The Case of Methylbutynol Conversion. ACS Catal 2014. [DOI: 10.1021/cs5010807] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hugo Petitjean
- Institut
Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Matériaux
Avancés pour la Catalyse et la Santé (MACS), Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier Cedex 5, France
| | - Hazar Guesmi
- Institut
Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Matériaux
Avancés pour la Catalyse et la Santé (MACS), Ecole Nationale Supérieure de Chimie, 8 rue de l’Ecole Normale, F-34296 Montpellier Cedex 5, France
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS-UMR
7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - Hélène Lauron-Pernot
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS-UMR
7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - Guylène Costentin
- Sorbonne Universités, UPMC Univ Paris 06,
UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
- CNRS-UMR
7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France
| | - David Loffreda
- Université
de Lyon, CNRS-Laboratoire de Chimie UMR 5182, Ecole Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon, France
| | - Philippe Sautet
- Université
de Lyon, CNRS-Laboratoire de Chimie UMR 5182, Ecole Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon, France
| | - Françoise Delbecq
- Université
de Lyon, CNRS-Laboratoire de Chimie UMR 5182, Ecole Normale Supérieure de Lyon, 46 Allée d’Italie, F-69364 Lyon, France
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46
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Huang B, Kobayashi H, Kitagawa H. Facile Synthesis of Small MgO Nanoparticle/Metal–Organic Framework Hybrid Material. CHEM LETT 2014. [DOI: 10.1246/cl.140429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Bo Huang
- Division of Chemistry, Graduate School of Science, Kyoto University
| | - Hirokazu Kobayashi
- Division of Chemistry, Graduate School of Science, Kyoto University
- JST CREST
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University
- JST CREST
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47
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Methanol as a clean and efficient H-transfer reactant for carbonyl reduction: Scope, limitations, and reaction mechanism. J Catal 2014. [DOI: 10.1016/j.jcat.2014.06.023] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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48
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Zeitler TR, Greathouse J, Gale J, Cygan RT. Vibrational Analysis of Brucite Surfaces and the Development of an Improved Force Field for Molecular Simulation of Interfaces. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2014; 118:7946-7953. [PMID: 24803972 PMCID: PMC3993912 DOI: 10.1021/jp411092b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 03/20/2014] [Indexed: 05/13/2023]
Abstract
We introduce a nonbonded three-body harmonic potential energy term for Mg-O-H interactions for improved edge surface stability in molecular simulations. The new potential term is compatible with the Clayff force field and is applied here to brucite, a layered magnesium hydroxide mineral. Comparisons of normal mode frequencies from classical and density functional theory calculations are used to verify a suitable spring constant (k parameter) for the Mg-O-H bending motion. Vibrational analysis of hydroxyl librations at two brucite surfaces indicates that surface Mg-O-H modes are shifted to frequencies lower than the corresponding bulk modes. A comparison of DFT and classical normal modes validates this new potential term. The methodology for parameter development can be applied to other clay mineral components (e.g., Al, Si) to improve the modeling of edge surface stability, resulting in expanded applicability to clay mineral applications.
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Affiliation(s)
- Todd R. Zeitler
- Sandia National
Laboratories, Albuquerque, New Mexico 87185-0754, United States
| | | | - Julian
D. Gale
- Nanochemistry Research Institute, Department of Chemistry, Curtin
University, P.O. Box U1987, Perth, Western Australia 6845, Australia
| | - Randall T. Cygan
- Sandia National
Laboratories, Albuquerque, New Mexico 87185-0754, United States
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Identification and Characterization of Surface Hydroxyl Groups by Infrared Spectroscopy. ADVANCES IN CATALYSIS 2014. [DOI: 10.1016/b978-0-12-800127-1.00002-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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50
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McKenna KP. Electronic and chemical properties of a surface-terminated screw dislocation in MgO. J Am Chem Soc 2013; 135:18859-65. [PMID: 24279391 PMCID: PMC3892727 DOI: 10.1021/ja408342z] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dislocations represent an important and ubiquitous class of topological defect found at the surfaces of metal oxide materials. They are thought to influence processes as diverse as crystal growth, corrosion, charge trapping, luminescence, molecular adsorption, and catalytic activity; however, their electronic and chemical properties remain poorly understood. Here, through a detailed first-principles investigation into the properties of a surface-terminated screw dislocation in MgO we provide atomistic insight into these issues. We show that surface dislocations can exhibit intriguing electron trapping properties which are important for understanding the chemical and electronic characteristics of oxide surfaces. The results presented in this article taken together with recent experimental reports show that surface dislocations can be equally as important as more commonly considered surface defects, such as steps, kinks, and vacancies, but are now just beginning to be understood.
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Affiliation(s)
- Keith P McKenna
- Department of Physics, University of York , Heslington, York YO10 5DD, United Kingdom
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