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Barbosa FF, Tavares JE, Albuquerque ADR, Morales Torres MA, Rodríguez-Castellón E, Pergher SBC, Braga TP. Catalytic dehydration of glycerol over Cu-Fe-Al-based oxides: understanding changes in active sites throughout the reaction. RSC Adv 2023; 13:31182-31200. [PMID: 37881763 PMCID: PMC10594406 DOI: 10.1039/d3ra05454c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/18/2023] [Indexed: 10/27/2023] Open
Abstract
The glycerol conversion into acetol using Fe, Al and Cu-based oxides was investigated. XRD results indicate the formation of nanosized particles with high phase dispersion, however, Raman, Mössbauer, 27Al NMR and XPS spectroscopies suggest the presence of iron(iii) oxide, Al2O3 and CuO phases. The FTIR with pyridine adsorption revealed high Lewis acidity. The TPR profile showed the reduction temperature range for the Fe3+ and Cu2+ sites, indicating the suitable condition for pretreatment. The N2 adsorption-desorption isotherms indicated the presence of micro-mesopores with interesting textural properties and specific area varying between 71 and 220 m2 g-1, while the porous morphology was observed by SEM and TEM images. The optimized catalytic tests showed glycerol conversion of 60% and acetol selectivity of 92% with 17% of coke according to TG profile. The recycling tests confirmed the efficiency of the solid, reaching 28% conversion and 91% acetol selectivity after four reuses and, after reactivation in an oxidizing atmosphere, the catalytic performance obtained results close to the second reuse. The interaction between the different Lewis acid sites involved in the mechanisms for the acetol and coke formation on the catalyst surface is discussed. The charge distribution represented by colors which indicates the acid-base surface was evaluated by a simple theoretical-computational study based on the DFT approach. The synergy between the active sites indicates that the presence of Cu0/Cu+ drastically increases the acetol selectivity which is a more important characteristic than the high Lewis acidity of Fen+ and Al3+.
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Affiliation(s)
- Felipe Fernandes Barbosa
- Laboratório de Peneiras Moleculares, Instituto de Química, Universidade Federal do Rio Grande do Norte 59078-970 Natal RN Brazil +55-84-3342-2323
| | - João Edson Tavares
- Instituto de Química, Universidade Federal do Rio Grande do Norte 59078-970 Natal RN Brazil
| | | | | | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga 29071 Málaga Spain
| | - Sibele B C Pergher
- Laboratório de Peneiras Moleculares, Instituto de Química, Universidade Federal do Rio Grande do Norte 59078-970 Natal RN Brazil +55-84-3342-2323
| | - Tiago Pinheiro Braga
- Laboratório de Peneiras Moleculares, Instituto de Química, Universidade Federal do Rio Grande do Norte 59078-970 Natal RN Brazil +55-84-3342-2323
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2
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Wang B, Ding Y, Yin S, Cai M. A DFT Study on the Mechanism of Active Species in Selective Photocatalytic Oxidation of Toluene into Benzaldehyde on (WO
3
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3
Clusters. ChemistrySelect 2022. [DOI: 10.1002/slct.202203173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bin Wang
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
| | - Yu‐Feng Ding
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
| | - Shuang‐Feng Yin
- Advanced Catalytic Engineering Research Center of the Ministry of Education State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Provincial Hunan Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions Hunan University Changsha 410082 Hunan Province P. R. China
| | - Meng‐Qiu Cai
- Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications School of Physics and Electronics Science Hunan University Changsha 410082 P. R. China
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3
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Conversion of Alcohols on Stoichiometric and Reduced Rutile TiO2 (110): Point Defects Meet Bifunctionality in Oxide (Photo-)Chemistry. Catal Letters 2022. [DOI: 10.1007/s10562-022-04077-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
AbstractOxidic (photo-)catalysts have the potential to play an important role to efficiently implement sustainable feedstocks and green energy sources into future energy technologies. They may be used not only for solar energy harvesting, but also for hydrogen production or being essential for the fabrication of fine chemicals. Therefore, it is crucial to develop a detailed understanding of how the atomistic environment of the catalyst can be designed in order to promote distinct reaction pathways to influence the final product distribution of chemical reactions. In this perspective article, we survey the surface (photo-)chemistry of methanol on rutile TiO2 surfaces and hybrid catalysts based thereon. Especially the role of the surface bifunctionality by Lewis acidic and basic sites combined with the strong impact of point defects such as reduced titanium sites (mainly Ti3+ interstitials) shall be illuminated. It is shown how the selective activation of either O–H, C–H or C–O bonds in the methanol molecule can be used to tune not only the overall conversion, but to switch between oxidative and reductive routes in favor of either deoxygenation, partial oxidation or C–C coupling reactions. Especially the latter ones are of particular interest to introduce methanol from green sources such as biomass as a sustainable feedstock into already existing petrochemical technologies.
Graphical Abstract
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4
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Surnev S, Netzer FP. Tungsten and molybdenum oxide nanostructures: two-dimensional layers and nanoclusters. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:233001. [PMID: 35045403 DOI: 10.1088/1361-648x/ac4ceb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
W- and Mo-oxides form an interesting class of materials, featuring structural complexities, stoichiometric flexibility, and versatile physical and chemical properties that render them attractive for many applications in diverse fields of nanotechnologies. In nanostructured form, novel properties and functionalities emerge as a result of quantum size and confinement effects. In this topical review, W- and Mo-oxide nanosystems are examined with particular emphasis on two-dimensional (2D) layers and small molecular-type clusters. We focus on the epitaxial growth of 2D layers on metal single crystal surfaces and investigate their novel geometries and structures by a surface science approach. The coupling between the oxide overlayer and the metal substrate surface is a decisive element in the formation of the oxide structures and interfacial strain and charge transfer are shown to determine the lowest energy structures. Atomic structure models as determined by density functional theory (DFT) simulations are reported and discussed for various interface situations, with strong and weak coupling. Free-standing (quasi-)2D oxide layers, so-called oxide nanosheets, are attracting a growing interest recently in the applied research community because of their easy synthesis via wet-chemical routes. Although they consist typically of several atomic layers thick-not always homogeneous-platelet systems, their quasi-2D character induces a number of features that make them attractive for optoelectronic, sensor or biotechnological device applications. A brief account of recently published preparation procedures of W- and Mo-oxide nanosheets and some prototypical examples of proof of concept applications are reported here. (MO3)3(M = W, Mo) clusters can be generated in the gas phase in nearly monodisperse form by a simple vacuum sublimation technique. These clusters, interesting molecular-type structures by their own account, can be deposited on a solid surface in a controlled way and be condensed into 2D W- and Mo-oxide layers; solid-state chemical reactions with pre-deposited surface oxide layers to form 2D ternary oxide compounds (tungstates, molybdates) have also been reported. The clusters have been proposed as model systems for molecular studies of reactive centres in catalytic reactions. Studies of the catalysis of (MO3)3clusters in unsupported and supported forms, using the conversion of alcohols as model reactions, are discussed. Finally, we close with a brief outlook of future perspectives.
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Affiliation(s)
- Svetlozar Surnev
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
| | - Falko P Netzer
- Surface and Interface Physics, Institute of Physics, Karl-Franzens University Graz, A-8010 GRAZ, Austria
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5
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Li J, Das A, Ma Q, Bedzyk MJ, Kratish Y, Marks TJ. Diverse Mechanistic Pathways in Single-Site Heterogeneous Catalysis: Alcohol Conversions Mediated by a High-Valent Carbon-Supported Molybdenum-Dioxo Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04319] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jiaqi Li
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- The Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Anusheela Das
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- The Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Qing Ma
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Michael J. Bedzyk
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
- The Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Yosi Kratish
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- The Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- The Institute for Catalysis in Energy Processes (ICEP), Northwestern University, Evanston, Illinois 60208, United States
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6
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García-López EI, Pomilla FR, Krivtsov I, Serrano A, Liotta LF, Villar-Rodil S, Paredes JI, Marcì G. Heteropolyacids supported on boron nitride and carbon nitride for catalytic and catalytic photo-assisted alcohol dehydration. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.01.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sudarsanam P, Gupta NK, Mallesham B, Singh N, Kalbande PN, Reddy BM, Sels BF. Supported MoO x and WO x Solid Acids for Biomass Valorization: Interplay of Coordination Chemistry, Acidity, and Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03326] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Putla Sudarsanam
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Navneet Kumar Gupta
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Baithy Mallesham
- Chemical Engineering Department, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502285, India
| | - Nittan Singh
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Pavan Narayan Kalbande
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Benjaram M. Reddy
- Catalysis and Fine Chemicals Department, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 007, India
| | - Bert F. Sels
- Center for Sustainable Catalysis and Engineering, Faculty of Bioscience Engineering, KU Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
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8
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Wang S, Huang JK, Li M, Azam A, Zu X, Qiao L, Yang J, Li S. Growth of High-Quality Monolayer Transition Metal Dichalcogenide Nanocrystals by Chemical Vapor Deposition and Their Photoluminescence and Electrocatalytic Properties. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47962-47971. [PMID: 34591469 DOI: 10.1021/acsami.1c14136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two-dimensional transition metal dichalcogenide (TMDC) nanocrystals (NCs) exhibit unique optical and electrocatalytic properties. However, the growth of uniform and high-quality NCs of monolayer TMDC remains a challenge. Until now, most of them are synthesized via a solution-based hydrothermal process or ultrasonic exfoliation method, in which the capping ligands introduced from organic solution often quench the optical and electrocatalytic properties of TMDC NCs. Moreover, it is difficult to homogeneously disperse the solution-based TMDC NCs on a substrate for device fabrication, since the dispersed NCs can easily aggregate. Here, we put forward a novel CVD method to grow closely spaced MoS2 NCs around 5 nm in lateral size. TEM and AFM characterizations demonstrate the monolayer and high-crystalline nature of MoS2 NCs. An obvious blue-shift with 130 meV in photoluminescence signals can be observed. The MoS2 NCs also show an outstanding surface-enhanced Raman scattering for organic molecules due to their localized surface plasmon and abundant edge sites and exhibit excellent electrocatalytic properties for the hydrogen-evolution reaction with a very low onset potential of ∼50 mV and Tafel slope of ∼57 mV/decade. Finally, we further demonstrate this kind of CVD method as a versatile platform for the growth of other TMDC NCs, such as WSe2 and MoSe2 NCs.
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Affiliation(s)
- Shuangyue Wang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Jing-Kai Huang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Mengyao Li
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Ashraful Azam
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Xiaotao Zu
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Liang Qiao
- School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Jack Yang
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Sean Li
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
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9
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Mohrhusen L, Al-Shamery K. Conversion of methanol on rutile TiO 2 (110) and tungsten oxide clusters: 1. population of defect-dependent thermal reaction pathways. Phys Chem Chem Phys 2021; 23:12137-12147. [PMID: 34013928 DOI: 10.1039/d1cp01175h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tungsten oxide clusters deposited on rutile TiO2 (110) single crystals were used as a model system for heterogenous oxide-oxide bifunctional catalysts. The population of different thermal reaction routes in methanol conversion in the presence of preadsorbed oxygen was probed under UHV conditions. By temperature programmed reaction spectroscopy, we have identified three thermal reaction channels, namely the deoxygenation under formation of methane, the partial oxidation forming formaldehyde and the condensation route under desorption of ethane and dimethyl ether. The specific local reaction environment at the oxidic surface was found to be key for the population of the different reaction channels as exhibited by the introduction of Lewis acidic and basic sites (especially (WO3)n clusters) and available charge carriers such as Ti3+. Especially the amount of bulk Ti3+ interstitials, that can partially transfer charge towards the tungsten oxide clusters at the TiO2 surface, was found to be a key parameter that enables a relatively high methanol conversion in thermal reactions. It turned out that the deoxygenation is by far the most dominant reaction followed by the partial oxidation. The condensation is observed only in low amounts under special conditions, but is an interesting example for reactivity at defect sites.
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Affiliation(s)
- Lars Mohrhusen
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26129 Oldenburg, Germany.
| | - Katharina Al-Shamery
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26129 Oldenburg, Germany.
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10
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Mohrhusen L, Kräuter J, Al-Shamery K. Conversion of methanol on rutile TiO 2(110) and tungsten oxide clusters: 2. The role of defects and electron transfer in bifunctional oxidic photocatalysts. Phys Chem Chem Phys 2021; 23:12148-12157. [PMID: 34018509 DOI: 10.1039/d1cp01176f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The photochemical conversion of organic compounds on tailored transition metal oxide surfaces by UV irradiation has found wide applications ranging from the production of chemicals to the degradation of organic pollutants e.g. in waste water treatment. Here, we present a systematic surface science-based study of the UV photoconversion of methanol on a rutile TiO2(110) surface. Under the used conditions, the dominant photoreaction is the photo-oxidation forming formaldehyde, that is drastically boosted by the presence of adsorbed oxygen as well as (sub-)surface defects such as oxygen vacancies and Ti3+ interstitials. Moreover, a photostimulated and Ti3+ mediated C-C coupling was observed leading to the production of ethene. We have further deposited tungsten oxide clusters on the rutile surface and examined the impact on the methanol photochemistry. In this case, the C-C coupling can be suppressed. Surprisingly, especially for high Ti3+ contents the population of the photochemical pathway is quenched in favor of the population of the thermal reaction yielding more methane from the deoxygenation reaction. So, the common concept that long time charge separation is efficient by combining two photocatalysts with similar band gaps, but different work functions in order to enhance photochemical yields is apparently too naive for certain systems. We attribute the loss of photoproducts with tungsten oxide coadsorption to the "pinning" of Ti3+ centers and a related enhancement of electron density near the oxide clusters which makes a concomitant recombination of the photochemical relevant holes with the excess surface electrons more likely.
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Affiliation(s)
- Lars Mohrhusen
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26129 Oldenburg, Germany.
| | - Jessica Kräuter
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26129 Oldenburg, Germany.
| | - Katharina Al-Shamery
- Institute of Chemistry, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky Strasse 9-11, D-26129 Oldenburg, Germany.
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11
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Abstract
This review aims to give a general overview of the recent use of tungsten-based catalysts for wide environmental applications, with first some useful background information about tungsten oxides. Tungsten oxide materials exhibit suitable behaviors for surface reactions and catalysis such as acidic properties (mainly Brønsted sites), redox and adsorption properties (due to the presence of oxygen vacancies) and a photostimulation response under visible light (2.6–2.8 eV bandgap). Depending on the operating condition of the catalytic process, each of these behaviors is tunable by controlling structure and morphology (e.g., nanoplates, nanosheets, nanorods, nanowires, nanomesh, microflowers, hollow nanospheres) and/or interactions with other compounds such as conductors (carbon), semiconductors or other oxides (e.g., TiO2) and precious metals. WOx particles can be also dispersed on high specific surface area supports. Based on these behaviors, WO3-based catalysts were developed for numerous environmental applications. This review is divided into five main parts: structure of tungsten-based catalysts, acidity of supported tungsten oxide catalysts, WO3 catalysts for DeNOx applications, total oxidation of volatile organic compounds in gas phase and gas sensors and pollutant remediation in liquid phase (photocatalysis).
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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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Abstract
In the past several decades, light alkane dehydrogenation to mono-olefins, especially propane dehydrogenation to propylene has gained widespread attention and much development in the field of research and commercial application. Under suitable conditions, the supported Pt-Sn and CrOx catalysts widely used in industry exhibit satisfactory dehydrogenation activity and selectivity. However, the high cost of Pt and the potential environmental problems of CrOx have driven researchers to improve the coking and sintering resistance of Pt catalysts, and to find new non-noble metal and environment-friendly catalysts. As for the development of the reactor, it should be noted that low operation pressure is beneficial for improving the single-pass conversion, decreasing the amount of unconverted alkane recycled back to the reactor, and reducing the energy consumption of the whole process. Therefore, the research direction of reactor improvement is towards reducing the pressure drop. This review is aimed at introducing the characteristics of the dehydrogenation reaction, the progress made in the development of catalysts and reactors, and a new understanding of reaction mechanism as well as its guiding role in the development of catalyst and reactor.
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Affiliation(s)
- Chunyi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, P. R. China.
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14
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Doudin N, Collinge G, Gurunathan PK, Lee MS, Glezakou VA, Rousseau R, Dohnálek Z. Creating self-assembled arrays of mono-oxo (MoO 3) 1 species on TiO 2(101) via deposition and decomposition of (MoO 3) n oligomers. Proc Natl Acad Sci U S A 2021; 118:e2017703118. [PMID: 33472974 PMCID: PMC7848584 DOI: 10.1073/pnas.2017703118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hierarchically ordered oxides are of critical importance in material science and catalysis. Unfortunately, the design and synthesis of such systems remains a key challenge to realizing their potential. In this study, we demonstrate how the deposition of small oligomeric (MoO3)1-6 clusters-formed by the facile sublimation of MoO3 powders-leads to the self-assembly of locally ordered arrays of immobilized mono-oxo (MoO3)1 species on anatase TiO2(101). Using both high-resolution imaging and theoretical calculations, we reveal the dynamic behavior of the oligomers as they spontaneously decompose at room temperature, with the TiO2 surface acting as a template for the growth of this hierarchically structured oxide. Transient mobility of the oligomers on both bare and (MoO3)1-covered TiO2(101) areas is identified as key to the formation of a complete (MoO3)1 overlayer with a saturation coverage of one (MoO3)1 per two undercoordinated surface Ti sites. Simulations reveal a dynamic coupling of the reaction steps to the TiO2 lattice fluctuations, the absence of which kinetically prevents decomposition. Further experimental and theoretical characterizations demonstrate that (MoO3)1 within this material are thermally stable up to 500 K and remain chemically identical with a single empty gap state produced within the TiO2 band structure. Finally, we see that the constituent (MoO3)1 of this material show no proclivity for step and defect sites, suggesting they can reliably be grown on the (101) facet of TiO2 nanoparticles without compromising their chemistry.
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Affiliation(s)
- Nassar Doudin
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Greg Collinge
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Pradeep Kumar Gurunathan
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Mal-Soon Lee
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Vassiliki-Alexandra Glezakou
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Roger Rousseau
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354;
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
| | - Zdenek Dohnálek
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA 99354;
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, WA 99354
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, WA 99163
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Huang Y, Wang B, Yuan H, Sun Y, Yang D, Cui X, Shi F. The catalytic dehydrogenation of ethanol by heterogeneous catalysts. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02479a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this review, recent advances in the catalytic dehydrogenation of ethanol to acetaldehytde with the release of hydrogen catalyzed by a heterogeneous catalyst aresummerized and discussed.
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Affiliation(s)
- Yongji Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Bin Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Hangkong Yuan
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Yubin Sun
- Shaanxi Yanchang Petroleum (Group) Co., Ltd
- Xi'an
- China
| | - Dongyuan Yang
- Shaanxi Yanchang Petroleum (Group) Co., Ltd
- Xi'an
- China
| | - Xinjiang Cui
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Feng Shi
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences
- Lanzhou 730000
- China
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16
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Mitran G, Saab R, Charisiou N, Polychronopoulou K, Goula M. MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA: ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Zhu Y, Zhang Z, Jin R, Liu J, Liu G, Han B, Jiao N. DMSO‐Enabled Selective Radical O−H Activation of 1,3(4)‐Diols. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007187] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Ziyao Zhang
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Rui Jin
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Guoquan Liu
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Xue Yuan Rd. 38 Beijing 100191 China
- State Key Laboratory of Organometallic Chemistry Chinese Academy of Sciences Shanghai 200032 China
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18
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Zhu Y, Zhang Z, Jin R, Liu J, Liu G, Han B, Jiao N. DMSO-Enabled Selective Radical O-H Activation of 1,3(4)-Diols. Angew Chem Int Ed Engl 2020; 59:19851-19856. [PMID: 32701184 DOI: 10.1002/anie.202007187] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/05/2020] [Indexed: 12/16/2022]
Abstract
Control of selectivity is one of the central topics in organic chemistry. Although unprecedented alkoxyl-radical-induced transformations have drawn a lot of attention, compared to selective C-H activation, selective radical O-H activation remains less explored. Herein, we report a novel selective radical O-H activation strategy of diols by combining spatial effects with proton-coupled electron transfer (PCET). It was found that DMSO is an essential reagent that enables the regioselective transformation of diols. Mechanistic studies indicated the existence of the alkoxyl radical and the selective interaction between DMSO and hydroxyl groups. Moreover, the distal C-C cleavage was realized by this selective alkoxyl-radical-initiation protocol.
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Affiliation(s)
- Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Ziyao Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Rui Jin
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Guoquan Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. 38, Beijing, 100191, China.,State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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19
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Payard PA, Finidori C, Guichard L, Cartigny D, Corbet M, Khrouz L, Bonneviot L, Wischert R, Grimaud L, Pera-Titus M. Rational Optimization of Lewis-Acid Catalysts for the Direct Amination of Alcohols, Part 1 - Activity Descriptors for Metal Triflates and Triflimides. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000229] [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)
- Pierre-Adrien Payard
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Céline Finidori
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Laurélia Guichard
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Damien Cartigny
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Matthieu Corbet
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Lhoussain Khrouz
- Univ Lyon, ENS de Lyon, CNRS UMR 5182; Université Claude Bernard Lyon 1, Laboratoire de Chimie; 46 Allée d'Italie 69342 Lyon France
| | - Laurent Bonneviot
- Univ Lyon, ENS de Lyon, CNRS UMR 5182; Université Claude Bernard Lyon 1, Laboratoire de Chimie; 46 Allée d'Italie 69342 Lyon France
| | - Raphael Wischert
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
| | - Laurence Grimaud
- Laboratoire des Biomolécules, LBM; Département de Chimie, École Normale Supérieure; PSL University, Sorbonne Université, CNRS UMR 7203; 24 rue Lhomond 75005 Paris France
| | - Marc Pera-Titus
- Eco-Efficient Products and Processes Laboratory (E2P2L); UMI 3464 CNRS Solvay; 3966 Jin Du Road, Xin Zhuang Ind Zone 201108 Shanghai China
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20
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Stein TH, Vasiliu M, Arduengo AJ, Dixon DA. Lewis Acidity and Basicity: Another Measure of Carbene Reactivity. J Phys Chem A 2020; 124:6096-6103. [DOI: 10.1021/acs.jpca.0c03877] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Trent H. Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Anthony J. Arduengo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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21
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Kiani D, Sourav S, Taifan W, Calatayud M, Tielens F, Wachs IE, Baltrusaitis J. Existence and Properties of Isolated Catalytic Sites on the Surface of β-Cristobalite-Supported, Doped Tungsten Oxide Catalysts (WOx/β-SiO2, Na-WOx/β-SiO2, Mn-WOx/β-SiO2) for Oxidative Coupling of Methane (OCM): A Combined Periodic DFT and Experimental Study. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05591] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniyal Kiani
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca
Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States
| | - Sagar Sourav
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca
Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States
| | - William Taifan
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca
Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, United States
| | - Monica Calatayud
- Sorbonne Université, CNRS, Laboratoire de Chimie Théorique, LCT, F-75005 Paris, France
| | - Frederik Tielens
- General Chemistry (ALGC)-Materials Modelling Group, Vrije Universiteit Brussel (Free University Brussels-VUB), Pleinlaan 2, 1050 Brussel, Belgium
| | - Israel E. Wachs
- Department of Chemical and Biomolecular Engineering, Lehigh University, B336 Iacocca
Hall, 111 Research Drive, Bethlehem, Pennsylvania 18015, 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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22
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Paul B, Sharma S, Purkayastha DD, Dhar SS, Bal R. Facile synthesis of size-controlled Ag supported on WO3 nanorods and their application as novel and active catalyst in oxidant-free dehydrogenation of benzyl alcohols. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.105804] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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23
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Porcheddu A, Chelucci G. Base-Mediated Transition-Metal-Free Dehydrative C-C and C-N Bond-Forming Reactions from Alcohols. CHEM REC 2019; 19:2398-2435. [PMID: 31021533 DOI: 10.1002/tcr.201800170] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 03/31/2019] [Indexed: 02/05/2023]
Abstract
In recent years, there has been an increasing interest in using alcohols as alkylating agents for C-C and C-N bond-forming processes employing mainly TM-catalysts. Although BH-catalysis looks like a green atom economy process since water is the only by-product, it often suffers from one or more drawbacks, such as the use of expensive noble metal complexes, capricious ligands, and toxic organic solvents. Therefore, straightforward, efficient, atom economy and environmentally benign alternative protocols are desirable. This review aims to summarize the current knowledge within the published literature about dehydrative processes developed without TM-catalysts. The most recent contributions to this topic have been reviewed keeping into account the new findings reported in this area. The features, strengths, and limitations of these alcohol-based C-C and C-N bond-forming processes has also been taken into account.
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Affiliation(s)
- Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, SS 554 bivio per Sestu, 09042, Monserrato (CA), Italy
| | - Giorgio Chelucci
- Dipartimento di Agraria, Università degli Studi di Sassari, Viale Italia 39, 07100, Sassari, Italy
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24
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Maeno Z, Yasumura S, Liu C, Toyao T, Kon K, Nakayama A, Hasegawa JY, Shimizu KI. Experimental and theoretical study of multinuclear indium–oxo clusters in CHA zeolite for CH4 activation at room temperature. Phys Chem Chem Phys 2019; 21:13415-13427. [DOI: 10.1039/c9cp01873e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The local structure of CHA-zeolite supported indium–oxo clusters and CH4 activation at room temperature were experimentally and theoretically studied.
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Affiliation(s)
- Zen Maeno
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | | | - Chong Liu
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Takashi Toyao
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
| | - Kenichi Kon
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Akira Nakayama
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- JST
| | - Jun-ya Hasegawa
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
| | - Ken-ichi Shimizu
- Institute for Catalysis
- Hokkaido University
- Sapporo 001-0021
- Japan
- Elements Strategy Initiative for Catalysts and Batteries
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25
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Sharkey BE, Denning AL, Jentoft FC, Gangadhara R, Gopaladasu TV, Nicholas KM. New solid oxo-rhenium and oxo-molybdenum catalysts for the deoxydehydration of glycols to olefins. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.05.090] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Metal Clusters Dispersed on Oxide Supports: Preparation Methods and Metal-Support Interactions. Top Catal 2018. [DOI: 10.1007/s11244-018-0957-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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27
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Soltys EV, Urazov KK, Kharlamova TS, Vodyankina OV. Redox and Catalytic Properties of Copper Molybdates with Various Composition. KINETICS AND CATALYSIS 2018. [DOI: 10.1134/s0023158418010111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Miao Z, Yang F, Luan Y, Shu X, Ramella D. Synthesis of Fe 3 O 4 @P4VP@ZIF-8 core-shell microspheres and their application in a Knoevenagel condensation reaction. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2017.07.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Wang L, Li H, Zhang W, Zhao X, Qiu J, Li A, Zheng X, Hu Z, Si R, Zeng J. Supported Rhodium Catalysts for Ammonia-Borane Hydrolysis: Dependence of the Catalytic Activity on the Highest Occupied State of the Single Rhodium Atoms. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701089] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Xiao Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Jianxiang Qiu
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Aowen Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Xusheng Zheng
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Zhenpeng Hu
- School of Physics; Nankai University; Tianjin 300071 P.R. China
| | - Rui Si
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences; Shanghai 201204 P.R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
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30
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Wang L, Li H, Zhang W, Zhao X, Qiu J, Li A, Zheng X, Hu Z, Si R, Zeng J. Supported Rhodium Catalysts for Ammonia-Borane Hydrolysis: Dependence of the Catalytic Activity on the Highest Occupied State of the Single Rhodium Atoms. Angew Chem Int Ed Engl 2017; 56:4712-4718. [DOI: 10.1002/anie.201701089] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/01/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Liangbing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Hongliang Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Wenbo Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Xiao Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Jianxiang Qiu
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Aowen Li
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Xusheng Zheng
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Zhenpeng Hu
- School of Physics; Nankai University; Tianjin 300071 P.R. China
| | - Rui Si
- Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences; Shanghai 201204 P.R. China
| | - Jie Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale; Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences; Department of Chemical Physics; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
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31
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Frański R, Kozik T. Unexpected interaction between deprotonated biliverdin and alcohols as studied by ESI-MS. JOURNAL OF MASS SPECTROMETRY : JMS 2017; 52:65-68. [PMID: 27884051 DOI: 10.1002/jms.3900] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 11/21/2016] [Accepted: 11/21/2016] [Indexed: 06/06/2023]
Affiliation(s)
- Rafał Frański
- Adam Mickiewicz University, Faculty of Chemistry, Umultowska 89B, Poznan, 61-614, Poland
| | - Tomasz Kozik
- Adam Mickiewicz University, Faculty of Chemistry, Umultowska 89B, Poznan, 61-614, Poland
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32
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Feng R, Vasiliu M, Peterson KA, Dixon DA. Acidity of M(VI)O2(OH)2 for M = Group 6, 16, and U as Central Atoms. J Phys Chem A 2017; 121:1041-1050. [DOI: 10.1021/acs.jpca.6b11889] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rulin Feng
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - Monica Vasiliu
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A. Peterson
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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33
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Kim HY, Hybertsen MS, Liu P. Controlled Growth of Ceria Nanoarrays on Anatase Titania Powder: A Bottom-up Physical Picture. NANO LETTERS 2017; 17:348-354. [PMID: 28073258 DOI: 10.1021/acs.nanolett.6b04218] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The leading edge of catalysis research motivates physical understanding of the growth of nanoscale oxide structures on different supporting oxide materials that are themselves also nanostructured. This research opens up for consideration a diverse range of facets on the support material, versus the single facet typically involved in wide-area growth of thin films. Here, we study the growth of ceria nanoarchitectures on practical anatase titania powders as a showcase inspired by recent experiments. Density functional theory (DFT)-based methods are employed to characterize and rationalize the broad array of low energy nanostructures that emerge. Using a bottom-up approach, we are able to identify and characterize the underlying mechanisms for the facet-dependent growth of various ceria motifs on anatase titania based on formation energy. These motifs include 0D clusters, 1D chains, 2D plates, and 3D nanoparticles. The ceria growth mode and morphology are determined by the interplay of several factors including the role of the common cation valence, the interface template effect for different facets of the anatase support, enhanced ionic binding for more compact ceria motifs, and the local structural flexibility of oxygen ions in bridging the interface between anatase and ceria structures.
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Affiliation(s)
- Hyun You Kim
- Department of Materials Science and Engineering, Chungnam National University , 99-Daehakro, Daejeon 34134, Republic of Korea
| | - Mark S Hybertsen
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Ping Liu
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
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34
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Chelucci G. Metal-catalyzed dehydrogenative synthesis of pyrroles and indoles from alcohols. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.09.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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35
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Zhang H, Zhu J, Fang Z, Xu X, Zhang Y, Fan Y. A DFT study of (WO 3) 3 nanoclusters adsorption on defective MgO ultrathin films on Ag(001). RSC Adv 2017. [DOI: 10.1039/c7ra11025a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structures and electronic properties of (WO3)3 nanocluster adsorption on defective MgO ultrathin films supported on Ag(001) metal surfaces have been investigated by means of density functional theory (DFT) calculations including dispersion interactions.
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Affiliation(s)
- Hui Zhang
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Jia Zhu
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
| | - Zhenxing Fang
- Department of Physics
- Zunyi Normal University
- Zunyi
- China
| | - Xianglan Xu
- Institute of Applied Chemistry
- College of Chemistry
- Nanchang University
- Nanchang
- China
| | | | - Yuehua Fan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- China
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36
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Wu Q, Wu W, Wang B, Qiao Y, Ju H, Liu Y, Wang H. Asymmetrically decorated POM framework formed by a chiral polyanion. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1262539] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qiong Wu
- Department of Chemical Science and Technology, Kunming University, Kunming, PR China
- Key Laboratory of Yunnan Provincial Higher Education, Institutions for Organic Optoelectronic Materials and Devices, Kunming University, Kunming, China
| | - Wei Wu
- London Centre for Nano-technology, University College London, London, UK
- Key Laboratory of Yunnan Provincial Higher Education, Institutions for Organic Optoelectronic Materials and Devices, Kunming University, Kunming, China
| | - Baoling Wang
- Department of Chemical Science and Technology, Kunming University, Kunming, PR China
| | - Yongfeng Qiao
- Department of Chemical Science and Technology, Kunming University, Kunming, PR China
| | - Hongping Ju
- Medical School, Kunming University, Kunming, PR China
| | - Yuqiang Liu
- Department of Chemical Science and Technology, Kunming University, Kunming, PR China
| | - Hai Wang
- Key Laboratory of Yunnan Provincial Higher Education, Institutions for Organic Optoelectronic Materials and Devices, Kunming University, Kunming, China
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37
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González-Navarrete P, Schlangen M, Schwarz H. Gas-phase reactions of cationic molybdenum and tungsten monoxide with ethanol: a combined experimental/computational exercise. Struct Chem 2016. [DOI: 10.1007/s11224-016-0862-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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38
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Choksi T, Greeley J. Partial Oxidation of Methanol on MoO3 (010): A DFT and Microkinetic Study. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01633] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tej Choksi
- School
of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jeffrey Greeley
- School
of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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39
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Fang Z, Lee Z, Peterson KA, Dixon DA. Use of Improved Orbitals for CCSD(T) Calculations for Predicting Heats of Formation of Group IV and Group VI Metal Oxide Monomers and Dimers and UCl6. J Chem Theory Comput 2016; 12:3583-92. [DOI: 10.1021/acs.jctc.6b00327] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zongtang Fang
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Zachary Lee
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Kirk A. Peterson
- Department
of Chemistry, Washington State University, Pullman, Washington 99164-4630, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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40
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Fang Z, Both J, Li S, Yue S, Aprà E, Keçeli M, Wagner AF, Dixon DA. Benchmark Calculations of Energetic Properties of Groups 4 and 6 Transition Metal Oxide Nanoclusters Including Comparison to Density Functional Theory. J Chem Theory Comput 2016; 12:3689-710. [DOI: 10.1021/acs.jctc.6b00464] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zongtang Fang
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Johan Both
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Shenggang Li
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Shuwen Yue
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Edoardo Aprà
- William
R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Murat Keçeli
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Albert F. Wagner
- Chemical
Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Shelby Hall, Box
870336, Tuscaloosa, Alabama 35487-0336, United States
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41
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Zhu J, Zhang H, Tong Y, Wang C, Wang B, Huang X, Zhang Y. Tuning the charge states of CrW2O9 clusters deposited on perfect and defective MgO(001) surfaces with different color centers: A comprehensive DFT study. J Chem Phys 2016; 144:174706. [PMID: 27155646 DOI: 10.1063/1.4947549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The structures and electronic properties of bimetallic oxide CrW2O9 clusters supported on the perfect and defective MgO(001) surfaces with three different color centers, FS (0), FS (+), and FS (2+) centers, respectively, have been investigated by density functional theory calculations. Our results show that the configurations, adsorption energies, charge transfers, and bonding modes of dispersed CrW2O9 clusters are sensitive to the charge states of the FS centers. Compared with the gas-phase configuration, the CrW2O9 clusters supported on the defective surfaces are distorted dramatically, which exhibit different chain structures. On the perfect MgO surface, the depositions of clusters do not involve obvious charge transfer, while the situation is quite different on the defective MgO(001) surfaces in which significant electron transfer occurs from the surface to the cluster. Interestingly, this effect becomes more remarkable for electron-rich oxygen vacancies (FS (0) center) than that for electron-poor oxygen vacancies (FS (+) and FS (2+) centers). Furthermore, our work reveals a progressive Brønsted acid sites where spin density preferentially localized around the Cr atoms not the W atoms for all kinds of FS-centers, indicating the better catalytic activities can be expected for CrW2O9 cluster on defective MgO(001) surfaces with respect to the W3O9 cluster.
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Affiliation(s)
- Jia Zhu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Hui Zhang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yawen Tong
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Chengxing Wang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Bin Wang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Xin Huang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Yongfan Zhang
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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42
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Fang Z, Zetterholm P, Dixon DA. 1,2-Ethanediol and 1,3-Propanediol Conversions over (MO3)3 (M = Mo, W) Nanoclusters: A Computational Study. J Phys Chem A 2016; 120:1897-907. [PMID: 26901665 DOI: 10.1021/acs.jpca.6b00158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dehydration and dehydrogenation reactions of one and two 1,2-ethanediol and 1,3-propanediol molecules on (MO3)3 (M = Mo, W) nanoclusters have been studied computationally using density functional and coupled cluster (CCSD(T)) theory. The reactions are initiated by the formation of a Lewis acid-base complex with an additional hydrogen bond. Dehydration is the dominant reaction proceeding via a metal bisdiolate. Acetaldehyde, the major product for 1,2-ethanediol, is produced by α-hydrogen transfer from one CH2 group to the other. For 1,3-propanediol, the C-C bond breaking pathways to produce C2H4 and HCH═O simultaneously and proton transfer to generate propylene oxide have comparable barrier energies. The barrier to produce propanal from the propylene oxide complex is less than that for epoxide release from the cluster. On the Mo3O9 cluster, a redox reaction channel for 1,2-ethanediol to break the C-C bond to form two formaldehyde molecules and then to produce C2H4 is slightly more favorable than the formation of acetaldehyde. For W(VI), the energy barrier for the reduction pathway is larger due to the lower reducibility of W3O9. Similar reduction on Mo(VI) for 1,3-propanediol to form propene is not a favorable pathway compared with the other pathways as additional C-H bond breaking is required in addition to breaking a C-C bond. The dehydrogenation and dehydration activation energies for the selected glycols are larger than the reactions of ethanol and 1-propanol on the same clusters. The CCSD(T) method is required because density functional theory with the M06 and B3LYP functionals does not predict quantitative energies on the potential energy surface. The M06 functional performs better than does the B3LYP functional.
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Affiliation(s)
- Zongtang Fang
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - Patrick Zetterholm
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama , Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487, United States
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43
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Ray M, Waller SE, Jarrold CC. Effect of Alkyl Group on MxOy(-) + ROH (M = Mo, W; R = Me, Et) Reaction Rates. J Phys Chem A 2016; 120:1508-19. [PMID: 26878402 DOI: 10.1021/acs.jpca.6b00102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic comparison of MxOy(-) + ROH (M = Mo vs W; R = Me vs Et) reaction rate coefficients and product distributions combined with results of calculations on weakly bound MxOy(-)·ROH complexes suggest that the overall reaction mechanism has three distinct steps, consistent with recently reported results on analogous MxOy(-) + H2O reactivity studies. MxOy(-) + ROH → MxOy+1(-) + RH oxidation reactions are observed for the least oxidized clusters, and MxOy(-) + ROH → MxOyROH(-) addition reactions are observed for clusters in intermediate oxidation states, as observed previously in MxOy(-) + H2O reactions. The first step is weakly bound complex formation, the rate of which is governed by the relative stability of the MxOy(-)·ROH charge-dipole complexes and the Lewis acid-base complexes. Calculations predict that MoxOy(-) clusters form more stable Lewis acid-base complexes than WxOy(-), and the stability of EtOH complexes is enhanced relative to MeOH. Consistent with this result, MoxOy(-) + ROH rate coefficients are higher than analogous WxOy(-) clusters. Rate coefficients range from 2.7 × 10(-13) cm(3) s(-1) for W3O8(-) + MeOH to 3.4 × 10(-11) cm(3) s(-1) for Mo2O4(-) + EtOH. Second, a covalently bound complex is formed, and anion photoelectron spectra of the several MxOyROH(-) addition products observed are consistent with hydroxyl-alkoxy structures that are formed readily from the Lewis acid-base complexes. Calculations indicate that addition products are trapped intermediates in the MxOy(-) + ROH → MxOy+1(-) + RH reaction, and the third step is rearrangement of the hydroxyl group to a metal hydride group to facilitate RH release. Trapped intermediates are more prevalent in MoxOy(-) reaction product distributions, indicating that the rate of this step is higher for WxOy+1RH(-) than for MoxOy+1RH(-). This result is consistent with previous computational studies on analogous MxOy(-) + H2O reactions predicting that barriers along the pathway in the rearrangement step are higher for MoxOy(-) reactions than for WxOy(-).
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Affiliation(s)
- Manisha Ray
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Sarah E Waller
- Department of Chemistry, SUNY Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University , 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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44
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González-Navarrete P, Schlangen M, Wu XN, Schwarz H. Unravelling Mechanistic Aspects of the Gas-Phase Ethanol Conversion: An Experimental and Computational Study on the Thermal Reactions of MO2 (+) (M=Mo, W) with Ethanol. Chemistry 2016; 22:3077-83. [PMID: 26834042 DOI: 10.1002/chem.201504929] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Indexed: 11/11/2022]
Abstract
The ion/molecule reactions of molybdenum and tungsten dioxide cations with ethanol have been studied by Fourier transform ion-cyclotron resonance mass spectrometry (FT-ICR MS) and density functional theory (DFT) calculations. Dehydration of ethanol has been found as the dominant reaction channel, while generation of the ethyl cation corresponds to a minor product. Cleary, the reactions are mainly governed by the Lewis acidity of the metal center. Computational results, together with isotopic labeling experiments, show that the dehydration of ethanol can proceed either through a conventional concerted [1,2]-elimination mechanism or a step-wise process; the latter occurs via a hydroxyethoxy intermediate. Formation of C2 H5 (+) takes place by transfer of OH(-) from ethanol to the metal center of MO2 (+) . The molybdenum and tungsten dioxide cations exhibit comparable reactivities toward ethanol, and this is reflected in similar reaction rate constants and branching ratios.
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Affiliation(s)
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany), Fax
| | - Xiao-Nan Wu
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany), Fax
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany), Fax.
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45
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Du Y, Li G, Peterson EW, Zhou J, Zhang X, Mu R, Dohnálek Z, Bowden M, Lyubinetsky I, Chambers SA. Iso-oriented monolayer α-MoO3(010) films epitaxially grown on SrTiO3(001). NANOSCALE 2016; 8:3119-3124. [PMID: 26788784 DOI: 10.1039/c5nr07745a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The ability to synthesize well-ordered two-dimensional materials under ultra-high vacuum and directly characterize them by other techniques in situ can greatly advance our current understanding on their physical and chemical properties. In this paper, we demonstrate that iso-oriented α-MoO3 films with as low as single monolayer thickness can be reproducibly grown on SrTiO3(001) substrates by molecular beam epitaxy ((010)(MoO3)‖(001)(STO), [100](MoO3)‖[100](STO) or [010](STO)) through a self-limiting process. While one in-plane lattice parameter of the MoO3 is very close to that of the SrTiO3 (a(MoO3) = 3.96 Å, a(STO) = 3.905 Å), the lattice mismatch along other direction is large (∼5%, c(MoO3) = 3.70 Å), which leads to relaxation as clearly observed from the splitting of streaks in reflection high-energy electron diffraction (RHEED) patterns. A narrow range in the growth temperature is found to be optimal for the growth of monolayer α-MoO3 films. Increasing deposition time will not lead to further increase in thickness, which is explained by a balance between deposition and thermal desorption due to the weak van der Waals force between α-MoO3 layers. Lowering growth temperature after the initial iso-oriented α-MoO3 monolayer leads to thicker α-MoO3(010) films with excellent crystallinity.
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Affiliation(s)
- Yingge Du
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99352 USA.
| | - Guoqiang Li
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352 USA and Key Laboratory of Photovoltaic Materials of Henan Province, School of Physics & Electronics, Henan University, Kaifeng, 475004 P. R. China
| | - Erik W Peterson
- Department of Chemistry, University of Wyoming, Laramie, WY 82072 USA
| | - Jing Zhou
- Department of Chemistry, University of Wyoming, Laramie, WY 82072 USA
| | - Xin Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352 USA
| | - Rentao Mu
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352 USA
| | - Zdenek Dohnálek
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352 USA
| | - Mark Bowden
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99352 USA.
| | - Igor Lyubinetsky
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, 99352 USA.
| | - Scott A Chambers
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352 USA
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46
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Kang M, Bhan A. Kinetics and mechanisms of alcohol dehydration pathways on alumina materials. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00990e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ethanol dehydration on α,γ,η-alumina mechanistically and kinetically described by the same rate expression implicating similar active sites on all alumina materials.
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Affiliation(s)
- Minje Kang
- Department of Chemical Engineering and Materials Science
- University of Minnesota-Twin Cities
- Minneapolis
- USA
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science
- University of Minnesota-Twin Cities
- Minneapolis
- USA
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47
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Li K, Lv XX, Shi LL, Liu L, Li BL, Wu B. A new strategy to obtain tetranuclear cobalt(ii) metal–organic frameworks based on the [Co4(μ3-OH)2] cluster: synthesis, structures and properties. Dalton Trans 2016; 45:15078-15088. [DOI: 10.1039/c6dt02895k] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Three MOFs based on [Co4(μ3-OH)2] with 4-, 6- and 8-connected frameworks exhibit antiferromagnetic interactions and are good photocatalysts.
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Affiliation(s)
- Ke Li
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xiu-Xiu Lv
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Lu-Lu Shi
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Lu Liu
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Bao-Long Li
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Bing Wu
- State and Local Joint Engineering Laboratory for Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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48
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Affiliation(s)
- Stefan Vajda
- Materials
Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Nanoscience
and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Institute
for Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Michael G. White
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
- Department
of Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
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49
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Haiges R, Skotnitzki J, Fang Z, Dixon DA, Christe KO. The Molybdenum(V) and Tungsten(VI) Oxoazides [MoO(N
3
)
3
], [MoO(N
3
)
3
⋅2 CH
3
CN], [(bipy)MoO(N
3
)
3
], [MoO(N
3
)
5
]
2−
, [WO(N
3
)
4
], and [WO(N
3
)
4
⋅CH
3
CN]. Angew Chem Int Ed Engl 2015; 54:15550-5. [DOI: 10.1002/anie.201505418] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Juri Skotnitzki
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Zongtang Fang
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - Karl O. Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
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50
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Haiges R, Skotnitzki J, Fang Z, Dixon DA, Christe KO. Die Molybdän(V)‐ und Wolfram(VI)‐oxoazide [MoO(N
3
)
3
], [MoO(N
3
)
3
⋅2 CH
3
CN], [(bipy)MoO(N
3
)
3
], [MoO(N
3
)
5
]
2−
, [WO(N
3
)
4
] und [WO(N
3
)
4
⋅CH
3
CN]. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505418] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ralf Haiges
- Loker Hydrocarbon Research Institute and, Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Juri Skotnitzki
- Loker Hydrocarbon Research Institute and, Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Zongtang Fang
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, AL 35487 (USA)
| | - Karl O. Christe
- Loker Hydrocarbon Research Institute and, Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
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