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Sadeghi S, Karimi M, Radfar I, Gavinehroudi RG, Saberi D, Heydari A. Efficient strategy for interchangeable roles in a green and sustainable redox catalytic system: IL/Pd II-decorated SBA-15 as a mesoporous nanocatalyst. NEW J CHEM 2021. [DOI: 10.1039/d0nj05459c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Green synthesis of catalyst for the aerobic oxidation of alcohols using air as a green oxidant, and efficient and straightforward synthesis method for amine formation using formic acid as a green reductant.
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Affiliation(s)
| | | | - Iman Radfar
- Chemistry Department
- Tarbiat Modare University
- Tehran
- Iran
| | | | - Dariush Saberi
- Department of Chemistry, Faculty of Nano and Bio Science and Technology, Persian Gulf University
- Bushehr 75169
- Iran
| | - Akbar Heydari
- Chemistry Department
- Tarbiat Modare University
- Tehran
- Iran
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2
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Li Y, Chatterjee A, Chen LB, Lam FLY, Hu X. Pd doped Co functionalized SBA-15 as an active magnetic catalyst for low temperature solventless additive-base-free selective oxidation of benzyl alcohol. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110869] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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3
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Zhang X, Savara A, Getman RB. A Method for Obtaining Liquid-Solid Adsorption Rates from Molecular Dynamics Simulations: Applied to Methanol on Pt(111) in H 2O. J Chem Theory Comput 2020; 16:2680-2691. [PMID: 32134649 DOI: 10.1021/acs.jctc.9b01249] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Adsorption is an important step in heterogeneous catalysis as it predetermines how many reactant molecules can participate in a surface reaction per unit time. While the rate of adsorption processes is well studied in gas-solid adsorption in both theory and experiment, such rates are still not well studied for liquid-solid adsorption. This is partly because the ever-changing configurations of liquid-phase solvent molecules impede the ability to study a molecule approaching a surface from a liquid phase by either experiment or theory. In this work, we develop a method using molecular dynamics (MD) simulations to study the rate of adsorption in liquid-solid adsorption processes. Specifically, we use MD to model the diffusion of a methanol molecule in aqueous solvent and its adsorption to a Pt(111) surface. We find that by approximating the solute motion as following the same displacement rates as a random walk model, the adsorbed and non-adsorbed states of the methanol molecule near the Pt(111) surface can be discerned and quantified. In particular, this methodology enables extracting a sticking coefficient and a macroscopically relatable adsorption rate. This method can be applied to arbitrary types of reactants and surfaces, as well as different liquid environments, thus providing a general tool for predicting quantitative adsorption rates of liquid-solid adsorption systems.
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Affiliation(s)
- Xiaohong Zhang
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634-0909, United States
| | - Aditya Savara
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Rachel B Getman
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634-0909, United States
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Savara A, Chan-Thaw CE, Rossetti I, Villa A, Prati L. Benzyl Alcohol Oxidation on Carbon-Supported Pd Nanoparticles: Elucidating the Reaction Mechanism. ChemCatChem 2014. [DOI: 10.1002/cctc.201402552] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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5
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Sobota M, Nikiforidis I, Amende M, Zanón BS, Staudt T, Höfert O, Lykhach Y, Papp C, Hieringer W, Laurin M, Assenbaum D, Wasserscheid P, Steinrück HP, Görling A, Libuda J. Dehydrogenation of Dodecahydro-N-ethylcarbazole on Pd/Al2O3 Model Catalysts. Chemistry 2011; 17:11542-52. [DOI: 10.1002/chem.201101311] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Indexed: 11/08/2022]
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Takakusagi S, Fukui KI, Tero R, Asakura K, Iwasawa Y. First direct visualization of spillover species emitted from pt nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16392-16396. [PMID: 20973582 DOI: 10.1021/la102013a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We studied the methanol adsorption behavior of Pt nanoparticles that were vacuum-deposited on a TiO(2)(110) surface at room temperature by using an ultrahigh vacuum (UHV) scanning tunneling microscope (STM). A large number of bright spots were observed on fivefold-coordinated Ti (Ti(5c)) rows of the TiO(2)(110) surface after exposure of the Pt/TiO(2)(110) to methanol vapor. We assigned the bright spots to methoxy species. These were mobile and were found to hop along the Ti(5c) rows. In situ time-resolved STM observations of the formation and migration of the bright spots on the Pt/TiO(2)(110) were carried out in the presence of methanol. The bright spots were produced at the periphery of the Pt nanoparticles and migrated to the substrate Ti(5c) rows. We discuss the spillover process and behavior of the methoxy species on the Pt/TiO(2)(110).
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Affiliation(s)
- Satoru Takakusagi
- Catalysis Research Center, Hokkaido University, Kita-ku N21W10, Sapporo, Hokkaido 001-0021, Japan
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Stegelmann C, Andreasen A, Campbell CT. Degree of Rate Control: How Much the Energies of Intermediates and Transition States Control Rates. J Am Chem Soc 2009; 131:8077-82. [PMID: 19341242 DOI: 10.1021/ja9000097] [Citation(s) in RCA: 299] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carsten Stegelmann
- Department of Chemistry and Applied Engineering Science, Aalborg University, Niels Bohrs Vej 8 6700 Esbjerg, Denmark, Materials Research Department, National Laboratory for Sustainable Energy, Risø DTU, Frederiksborgvej 399, DK-4000 Roskilde, Denmark, and Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
| | - Anders Andreasen
- Department of Chemistry and Applied Engineering Science, Aalborg University, Niels Bohrs Vej 8 6700 Esbjerg, Denmark, Materials Research Department, National Laboratory for Sustainable Energy, Risø DTU, Frederiksborgvej 399, DK-4000 Roskilde, Denmark, and Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
| | - Charles T. Campbell
- Department of Chemistry and Applied Engineering Science, Aalborg University, Niels Bohrs Vej 8 6700 Esbjerg, Denmark, Materials Research Department, National Laboratory for Sustainable Energy, Risø DTU, Frederiksborgvej 399, DK-4000 Roskilde, Denmark, and Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
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Ubago-Pérez R, Carrasco-Marín F, Moreno-Castilla C. Methanol partial oxidation on carbon-supported Pt and Pd catalysts. Catal Today 2007. [DOI: 10.1016/j.cattod.2007.02.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Bäumer M, Libuda J, Neyman KM, Rösch N, Rupprechter G, Freund HJ. Adsorption and reaction of methanol on supported palladium catalysts: microscopic-level studies from ultrahigh vacuum to ambient pressure conditions. Phys Chem Chem Phys 2007; 9:3541-58. [PMID: 17612720 DOI: 10.1039/b700365j] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We investigated the decomposition and (partial) oxidation of methanol on Pd based catalysts in an integrated attempt, simultaneously bridging both the pressure and the materials gap. Combined studies were performed on well-defined Pd model catalysts based on ordered Al(2)O(3) and Fe(3)O(4) thin films, on well-defined particles supported on powders and on Pd single crystals. The interaction of Pd nanoparticles and Pd(111) with CH(3)OH and CH(3)OH/O(2) mixtures was examined from ultrahigh vacuum conditions up to ambient pressures, utilizing a broad range of surface specific vibrational spectroscopies which included IRAS, TR-IRAS, PM-IRAS, SFG, and DRIFTS. Detailed kinetic studies in the low pressure region were performed by molecular beam methods, providing comprehensive insights into the microkinetics of the reaction system. The underlying microscopic processes were studied theoretically on the basis of specially designed 3-D nanocluster models containing approximately 10(2) metal atoms. The efficiency of this novel modelling approach was demonstrated by rationalizing and complementing pertinent experimental results. In order to connect these results to the behavior under ambient conditions, kinetic and spectroscopic investigations were performed in reaction cells and lab reactors. Specifically, we focused on (1) particle size and structure dependent effects in methanol oxidation and decomposition, (2) support effects and their relation to activity and selectivity, (3) the influence of poisons such as carbon, and (4) the role of oxide and surface oxide formation on Pd nanoparticles.
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Affiliation(s)
- Marcus Bäumer
- Institut für Angewandte und Physikalische Chemie, Universität Bremen, Leobener Str. NW2, D-28359, Bremen, Germany
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Kandoi S, Greeley J, Sanchez-Castillo MA, Evans ST, Gokhale AA, Dumesic JA, Mavrikakis M. Prediction of Experimental Methanol Decomposition Rates on Platinum from First Principles. Top Catal 2006. [DOI: 10.1007/s11244-006-0001-1] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Borasio M, Rodríguez de la Fuente O, Rupprechter G, Freund HJ. In Situ Studies of Methanol Decomposition and Oxidation on Pd(111) by PM-IRAS and XPS Spectroscopy. J Phys Chem B 2005; 109:17791-4. [PMID: 16853280 DOI: 10.1021/jp053855c] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methanol decomposition and oxidation on Pd(111) at millibar pressure were studied by in situ polarization-modulation infrared reflection absorption spectroscopy (PM-IRAS), on-line gas chromatography and pre- and postreaction X-ray photoelectron spectroscopy (XPS). Various dehydrogenation products such as methoxy CH3O, formaldehyde CH2O, formyl CHO, and CO could be spectroscopically identified. Methanol oxidation proceeds via dehydrogenation to formaldehyde CH2O, which either desorbs or is further dehydrogenated to CO, which is subsequently oxidized to CO2. Carbonaceous overlayers that are present during the reaction may favorably affect the selectivity toward CH2O. The reaction takes place on metallic Pd, and no indications of an involvement of Pd surface oxide were observed.
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Affiliation(s)
- Marta Borasio
- Fritz-Haber-Institut der MPG, Faradayweg 4-6, D-14195 Berlin, Germany
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Laurin M, Johánek V, Grant AW, Kasemo B, Libuda J, Freund HJ. Local reaction rates and surface diffusion on nanolithographically prepared model catalysts: Experiments and simulations. J Chem Phys 2005; 122:84713. [PMID: 15836083 DOI: 10.1063/1.1854622] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Combining molecular beam methods and angular resolved mass spectrometry, we have studied the angular distribution of desorbing products during CO oxidation on a planar Pd/silica supported model catalyst. The model catalyst was prepared by means of electron beam lithography, allowing individual control of particle size, position, and aspect ratio, and was characterized by atomic force microscopy and scanning electron microscopy before and after reaction. In the experiment, both oxygen and CO rich regimes were investigated using separate molecular beams for the two reactants. This allows exploration of diffusion effects of reactants on the particles and of shadowing and backscattering phenomena. A reaction-diffusion model was developed in order to extract information about local reaction rates on the surface of the catalyst nanoparticles. The model takes into account the structural parameters of the catalyst as well as the backscattering of the reactants and products from the support. It allows a quantitative description of the experimental data and provides a detailed understanding of temperature and reactant flux dependent effects. Moreover, information on the surface mobility of oxygen under steady-state reaction conditions could be obtained by comparison with the experimental results.
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Affiliation(s)
- M Laurin
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
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Molecular-level descriptions of surface chemistry in kinetic models using density functional theory. Chem Eng Sci 2004. [DOI: 10.1016/j.ces.2004.09.038] [Citation(s) in RCA: 165] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Johánek V, Schauermann S, Laurin M, Gopinath CS, Libuda J, Freund HJ. On the Role of Different Adsorption and Reaction Sites on Supported Nanoparticles during a Catalytic Reaction: NO Decomposition on a Pd/Alumina Model Catalyst. J Phys Chem B 2004. [DOI: 10.1021/jp031371f] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- V. Johánek
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
| | - S. Schauermann
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
| | - M. Laurin
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
| | - Chinnakonda S. Gopinath
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
| | - J. Libuda
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
| | - H.-J. Freund
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Chemical Physics, Faradayweg 4-6, 14195 Berlin, Germany, and National Chemical Laboratory, Catalysis Division, Pune 411 008, India
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Schauermann S, Johánek V, Laurin M, Libuda J, Freund HJ. Interaction of NO with alumina supported palladium model catalysts. Phys Chem Chem Phys 2003. [DOI: 10.1039/b309490a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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