1
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Salom-Català A, Strugovshchikov E, Kaźmierczak K, Curulla-Ferré D, Ricart JM, Carbó JJ. Reactive Force Field Development for Propane Dehydrogenation on Platinum Surfaces. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:2844-2855. [PMID: 38414834 PMCID: PMC10895921 DOI: 10.1021/acs.jpcc.3c07126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 02/29/2024]
Abstract
Propane dehydrogenation (PDH) is an on-purpose catalytic technology to produce propylene from propane that operates at high temperatures, 773-973 K. Several key industry players have been active in developing new catalysts and processes with improved carbon footprint and economics, where Pt-based catalysts have played a central role. The optimization of these catalytic systems through computational and atomistic simulations requires large-scale models that account for their reactivity and dynamic properties. To address this challenge, we developed a new reactive ReaxFF force field (2023-Pt/C/H) that enables large-scale simulations of PDH reactions catalyzed on Pt surfaces. The optimization of force-field parameters relies on a large training set of density functional theory (DFT) calculations of Pt-catalyzed PDH mechanism, including geometries, adsorption and relative energies of reaction intermediates, and key C-H and C-C bond-breaking/forming reaction steps on the Pt(111) surface. The internal validation supports the accuracy of the developed 2023-Pt/C/H force-field parameters, resulting in mean absolute errors (MAE) against DFT data of 14 and 12 kJ mol-1 for relative energies of intermediates and energy barriers, respectively. We demonstrated the applicability of the 2023-Pt/C/H force field with reactive molecular dynamics simulations of propane on different Pt surface topologies and temperatures. The simulations successfully model the formation of propene in the gas phase as well as competitive, unproductive reactions such as deep dehydrogenation and C-C bond cleavage that produce H, C1 and C2 adsorbed species responsible of catalytic deactivation of Pt surface. Results show the following reactivity order: Pt(111) < Pt(100) < Pt(211), and that for the stepped Pt(211) surface, propane activation occurs on low-coordinated Pt atoms at the steps. The measured selectivity as a function of surface topology follows the same trend as activity, the Pt(211) facet being the most selective. The 2023-Pt/C/H reactive force field can also describe the increase of reactivity with the temperature. From these simulations, we were able to estimate the Arrhenius activation energy, 73 kJ mol-1, whose value is close to those reported experimentally for PDH catalyzed by large, supported Pt nanoparticles . The newly developed 2023-Pt/C/H reactive force field can be used in subsequent investigations of different Pt topologies and of collective effects such as temperature, propane pressure, or H surface coverage.
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Affiliation(s)
- Antoni Salom-Català
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Evgenii Strugovshchikov
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Kamila Kaźmierczak
- TotalEnergies
OneTech Belgium, Zone
Industrielle Feluy C, 7181 Seneffe, Belgium
| | | | - Josep M. Ricart
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Jorge J. Carbó
- Departament
de Química Física i Inorgànica, Universitat Rovira i Virgili, 43007 Tarragona, Spain
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2
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Maazallahi M, Nandy S, Aleshkevych P, Chae KH, Najafpour MM. Lead in the Presence of Iron under Alkaline Conditions for the Oxygen-Evolution Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16881-16891. [PMID: 37970729 DOI: 10.1021/acs.langmuir.3c02565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
The oxygen-evolution reaction (OER) is a bottleneck in water splitting, which is a critical process for energy storage. In this study, the electrochemistry of Pb in the absence or presence of K2FeO4, as a soluble Fe source, is examined at pH ≈ 13. Our findings indicate that Pb exhibits limited catalytic activity for the OER under alkaline conditions. However, upon the addition of K2FeO4 to the electrolyte, a significant enhancement in the OER activity is observed in the presence of Pb. A notable observation in this study is the formation of stable Fe(IV) species following the OER during chronoamperometry experiments conducted in an alkaline solution. In addition to in situ Raman and visible spectroscopies, the operated electrodes have been characterized by high-resolution transmission electron microscopy, scanning electron microscopy, electron spin resonance spectroscopy, X-ray diffraction, electrochemical methods, electron paramagnetic resonance, and X-ray absorption spectroscopy. Through our experimental investigations, it is consistently observed that the presence of Fe ions on the surface of Pb/PbOx serves as an effective catalyst for the OER. However, it is important to note that this heightened OER activity is only temporary due to the low adhesion of Fe ions on the surface of Pb/PbOx.
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Affiliation(s)
- Meysam Maazallahi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - Subhajit Nandy
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Pavlo Aleshkevych
- Institute of Physics, Polish Academy of Sciences, Warsaw 02-668, Poland
| | - Keun Hwa Chae
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Mohammad Mahdi Najafpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
- Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
- Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
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3
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Tang Y, Li Y, Feng Tao F. Activation and catalytic transformation of methane under mild conditions. Chem Soc Rev 2021; 51:376-423. [PMID: 34904592 DOI: 10.1039/d1cs00783a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In the last few decades, worldwide scientists have been motivated by the promising production of chemicals from the widely existing methane (CH4) under mild conditions for both chemical synthesis with low energy consumption and climate remediation. To achieve this goal, a whole library of catalytic chemistries of transforming CH4 to various products under mild conditions is required to be developed. Worldwide scientists have made significant efforts to reach this goal. These significant efforts have demonstrated the feasibility of oxidation of CH4 to value-added intermediate compounds including but not limited to CH3OH, HCHO, HCOOH, and CH3COOH under mild conditions. The fundamental understanding of these chemical and catalytic transformations of CH4 under mild conditions have been achieved to some extent, although currently neither a catalyst nor a catalytic process can be used for chemical production under mild conditions at a large scale. In the academic community, over ten different reactions have been developed for converting CH4 to different types of oxygenates under mild conditions in terms of a relatively low activation or catalysis temperature. However, there is still a lack of a molecular-level understanding of the activation and catalysis processes performed in extremely complex reaction environments under mild conditions. This article reviewed the fundamental understanding of these activation and catalysis achieved so far. Different oxidative activations of CH4 or catalytic transformations toward chemical production under mild conditions were reviewed in parallel, by which the trend of developing catalysts for a specific reaction was identified and insights into the design of these catalysts were gained. As a whole, this review focused on discussing profound insights gained through endeavors of scientists in this field. It aimed to present a relatively complete picture for the activation and catalytic transformations of CH4 to chemicals under mild conditions. Finally, suggestions of potential explorations for the production of chemicals from CH4 under mild conditions were made. The facing challenges to achieve high yield of ideal products were highlighted and possible solutions to tackle them were briefly proposed.
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Affiliation(s)
- Yu Tang
- Institute of Molecular Catalysis and In situ/operando Studies, College of Chemistry, Fuzhou University, Fujian, 350000, China.
| | - Yuting Li
- Department of Chemical and Petroleum Engineering, University of Kansas, KS 66045, USA.
| | - Franklin Feng Tao
- Department of Chemical and Petroleum Engineering, University of Kansas, KS 66045, USA.
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4
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Bychko I, Abakumov A, Nikolenko A, Selyshchev OV, Zahn DRT, Khavrus VO, Tang J, Strizhak P. Ethane Direct Dehydrogenation over Carbon Nanotubes and Reduced Graphene Oxide. ChemistrySelect 2021. [DOI: 10.1002/slct.202102493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Igor Bychko
- L. V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine Nauky Ave. 31 03028 Kyiv Ukraine
| | - Alexander Abakumov
- L. V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine Nauky Ave. 31 03028 Kyiv Ukraine
| | - Andrii Nikolenko
- Department V. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine Institution Nauky Ave. 41 Kyiv 03028 Ukraine
| | - O. V. Selyshchev
- Semiconductor Physics Chemnitz University of Technology D-09107 Chemnitz Germany
| | - D. R. T. Zahn
- Semiconductor Physics Chemnitz University of Technology D-09107 Chemnitz Germany
| | - Vyacheslav O. Khavrus
- Leibniz Institute for Solid State and Materials Research Dresden Helmholtzstr. 20 D01069 Dresden Germany
| | - Jianguo Tang
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology National Base of International Sci. & Tech. Cooperation on Hybrid Materials Qingdao University 308 Ningxia Road Qingdao 266071 P. R. China
| | - Peter Strizhak
- L. V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine Nauky Ave. 31 03028 Kyiv Ukraine
- Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology National Base of International Sci. & Tech. Cooperation on Hybrid Materials Qingdao University 308 Ningxia Road Qingdao 266071 P. R. China
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5
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Egorova S, Tuktarov R, Boretskaya A, Laskin A, Gizyatullov R, Lamberov A. Stabilizing effect of α-Cr2O3 on highly active phases and catalytic performance of a chromium alumina catalyst in the process of isobutane dehydrogenation. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111610] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Kim YH, Park J. Development of a Simple and Powerful Analytical Method for Formaldehyde Detection and Quantitation in Blood Samples. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2020; 2020:8810726. [PMID: 33457038 PMCID: PMC7787787 DOI: 10.1155/2020/8810726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/26/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Human beings are easily exposed to formaldehyde (FA) in a living environment. Entry of FA into the human body can have adverse effects on human health, depending on the FA concentration. Thus, a quantitative analysis of FA in blood is necessary in order to estimate its effect on the human body. In this study, a simple and rapid analytical method for the quantitation of FA in blood was developed. The total analysis time, including the pretreatment procedure, was less than 20 min. To ensure a stable analysis, blood samples were stabilized using tripotassium ethylenediaminetetraacetic acid solution, and FA was selectively derivatized using 2,4-dinitrophenylhydrazine as pretreatment procedures. The pretreated samples were analyzed using a high-performance liquid chromatography-UV system, which is the most common choice for analyzing small-molecule aldehydes like formaldehyde. Verification of the pretreatment methods (stabilization and derivatization) using FA standards confirmed that the pretreatment methods are highly reliable in the calibration range 0.012-5.761 ng μL-1 (slope = 684,898, R 2 = 0.9998, and limit of detection = 0.251 pg·μL-1). Analysis of FA in the blood samples of a Yucatan minipig using the new method revealed an average FA concentration of 1.98 ± 0.34 ng μL-1 (n = 3). Blood samples spiked with FA standards were analyzed, and the FA concentrations were found to be similar to the theoretical concentrations (2.16 ± 0.81% difference). The method reported herein can quantitatively analyze FA in blood at a sub-nanogram level within a short period of time and is validated for application in blood analysis.
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Affiliation(s)
- Yong-Hyun Kim
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup 56212, Republic of Korea
- Human and Environmental Toxicology, University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jeongsik Park
- Jeonbuk Department of Inhalation Research, Korea Institute of Toxicology, Jeongeup 56212, Republic of Korea
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7
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Guerrero‐Pérez MO, Patience GS, Bañares MA. Experimental methods in chemical engineering:
Raman
spectroscopy. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23884] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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8
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Lezcano-Gonzalez I, Campbell E, Hoffman AEJ, Bocus M, Sazanovich IV, Towrie M, Agote-Aran M, Gibson EK, Greenaway A, De Wispelaere K, Van Speybroeck V, Beale AM. Insight into the effects of confined hydrocarbon species on the lifetime of methanol conversion catalysts. NATURE MATERIALS 2020; 19:1081-1087. [PMID: 32929250 DOI: 10.1038/s41563-020-0800-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
The methanol-to-hydrocarbons reaction refers collectively to a series of important industrial catalytic processes to produce either olefins or gasoline. Mechanistically, methanol conversion proceeds through a 'pool' of hydrocarbon species. For the methanol-to-olefins process, these species can be delineated broadly into 'desired' lighter olefins and 'undesired' heavier fractions that cause deactivation in a matter of hours. The crux in further catalyst optimization is the ability to follow the formation of carbonaceous species during operation. Here, we report the combined results of an operando Kerr-gated Raman spectroscopic study with state-of-the-art operando molecular simulations, which allowed us to follow the formation of hydrocarbon species at various stages of methanol conversion. Polyenes are identified as crucial intermediates towards formation of polycyclic aromatic hydrocarbons, with their fate determined largely by the zeolite topology. Notably, we provide the missing link between active and deactivating species, which allows us to propose potential design rules for future-generation catalysts.
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Affiliation(s)
- I Lezcano-Gonzalez
- Chemistry Department, University College London, London, UK.
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK.
| | - E Campbell
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - A E J Hoffman
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - M Bocus
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - I V Sazanovich
- Central Laser Facility, STFC, Research Complex at Harwell, Didcot, UK
| | - M Towrie
- Central Laser Facility, STFC, Research Complex at Harwell, Didcot, UK
| | - M Agote-Aran
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - E K Gibson
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
- School of Chemistry, University of Glasgow, Glasgow, UK
| | - A Greenaway
- Chemistry Department, University College London, London, UK
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK
| | - K De Wispelaere
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium
| | - V Van Speybroeck
- Center for Molecular Modeling, Ghent University, Zwijnaarde, Belgium.
| | - A M Beale
- Chemistry Department, University College London, London, UK.
- UK Catalysis Hub, Research Complex at Harwell, Didcot, UK.
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9
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To KC, Ben-Jaber S, Parkin IP. Recent Developments in the Field of Explosive Trace Detection. ACS NANO 2020; 14:10804-10833. [PMID: 32790331 DOI: 10.1021/acsnano.0c01579] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Explosive trace detection (ETD) technologies play a vital role in maintaining national security. ETD remains an active research area with many analytical techniques in operational use. This review details the latest advances in animal olfactory, ion mobility spectrometry (IMS), and Raman and colorimetric detection methods. Developments in optical, biological, electrochemical, mass, and thermal sensors are also covered in addition to the use of nanomaterials technology. Commercially available systems are presented as examples of current detection capabilities and as benchmarks for improvement. Attention is also drawn to recent collaborative projects involving government, academia, and industry to highlight the emergence of multimodal screening approaches and applications. The objective of the review is to provide a comprehensive overview of ETD by highlighting challenges in ETD and providing an understanding of the principles, advantages, and limitations of each technology and relating this to current systems.
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Affiliation(s)
- Ka Chuen To
- Department of Chemistry, University College London, 20 Gordon Street, Bloomsbury, London WC1H 0AJ, United Kingdom
| | - Sultan Ben-Jaber
- Department of Science and Forensics, King Fahad Security College, Riyadh 13232, Saudi Arabia
| | - Ivan P Parkin
- Department of Chemistry, University College London, 20 Gordon Street, Bloomsbury, London WC1H 0AJ, United Kingdom
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10
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Moncada J, Adams WR, Thakur R, Julin M, Carrero CA. Developing a Raman Spectrokinetic Approach To Gain Insights into the Structure–Reactivity Relationship of Supported Metal Oxide Catalysts. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02041] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jorge Moncada
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - William R. Adams
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Raj Thakur
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Michael Julin
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
| | - Carlos A. Carrero
- Department of Chemical Engineering, Auburn University, Auburn, Alabama 36849, United States
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11
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Saerens S, Sabbe MK, Galvita VV, Redekop EA, Reyniers MF, Marin GB. The Positive Role of Hydrogen on the Dehydrogenation of Propane on Pt(111). ACS Catal 2017. [DOI: 10.1021/acscatal.7b01584] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephanie Saerens
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Maarten K. Sabbe
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Vladimir V. Galvita
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Evgeniy A. Redekop
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
- Centre
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Marie-Françoise Reyniers
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
| | - Guy B. Marin
- Laboratory
for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
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12
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Goetze J, Meirer F, Yarulina I, Gascon J, Kapteijn F, Ruiz-Martínez J, Weckhuysen BM. Insights into the Activity and Deactivation of the Methanol-to-Olefins Process over Different Small-Pore Zeolites As Studied with Operando UV-vis Spectroscopy. ACS Catal 2017; 7:4033-4046. [PMID: 28603658 PMCID: PMC5460665 DOI: 10.1021/acscatal.6b03677] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 04/23/2017] [Indexed: 11/28/2022]
Abstract
The nature and evolution of the hydrocarbon pool (HP) species during the Methanol-to-Olefins (MTO) process for three small-pore zeolite catalysts, with a different framework consisting of large cages interconnected by small eight-ring windows (CHA, DDR, and LEV) was studied at reaction temperatures between 350 and 450 °C using a combination of operando UV-vis spectroscopy and online gas chromatography. It was found that small differences in cage size, shape, and pore structure of the zeolite frameworks result in the generation of different hydrocarbon pool species. More specifically, it was found that the large cage of CHA results in the formation of a wide variety of hydrocarbon pool species, mostly alkylated benzenes and naphthalenes. In the DDR cage, 1-methylnaphthalene is preferentially formed, while the small LEV cage generally contains fewer hydrocarbon pool species. The nature and evolution of these hydrocarbon pool species was linked with the stage of the reaction using a multivariate analysis of the operando UV-vis spectra. In the 3-D pore network of CHA, the reaction temperature has only a minor effect on the performance of the MTO catalyst. However, for the 2-D pore networks of DDR and LEV, an increase in the applied reaction temperature resulted in a dramatic increase in catalytic activity. For all zeolites in this study, the role of the hydrocarbon species changes with reaction temperature. This effect is most clear in DDR, in which diamantane and 1-methylnaphthalene are deactivating species at a reaction temperature of 350 °C, whereas at higher temperatures diamantane formation is not observed and 1-methylnaphthalene is an active species. This results in a different amount and nature of coke species in the deactivated catalyst, depending on zeolite framework and reaction temperature.
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Affiliation(s)
- Joris Goetze
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Florian Meirer
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Irina Yarulina
- Catalysis
Engineering, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Jorge Gascon
- Catalysis
Engineering, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Freek Kapteijn
- Catalysis
Engineering, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Javier Ruiz-Martínez
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Bert M. Weckhuysen
- Inorganic
Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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13
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Botavina M, Barzan C, Piovano A, Braglia L, Agostini G, Martra G, Groppo E. Insights into Cr/SiO2 catalysts during dehydrogenation of propane: an operando XAS investigation. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00142h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In situ and operando XAS spectroscopic methods were applied to monitor the variations in the oxidation state and in the local structure of the chromium sites in a 2.0Cr/SiO2-DHS catalyst during propane dehydrogenation under non-oxidative and different oxidative conditions.
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Affiliation(s)
- M. Botavina
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
| | - C. Barzan
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
| | - A. Piovano
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
| | - L. Braglia
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
- European Synchrotron Radiation Facility (ESRF)
| | - G. Agostini
- IRC “Smart Materials”
- Southern Federal University
- 344090 Rostov-on-Don
- Russia
| | - G. Martra
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
- STM-CNR
| | - E. Groppo
- Department of Chemistry, NIS and INSTM Reference Centre
- University of Turin
- 1-10135 Torino
- Italy
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14
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Maghsoumi A, Ravanelli A, Consonni F, Nanni F, Lucotti A, Tommasini M, Donazzi A, Maestri M. Design and testing of an operando-Raman annular reactor for kinetic studies in heterogeneous catalysis. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00092h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel experimental tool that integrates in situ Raman spectroscopy and an annular reactor for the operando-Raman kinetic analysis of heterogeneous catalytic reactions.
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Affiliation(s)
- Ali Maghsoumi
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
| | - Andrea Ravanelli
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
| | - Federico Consonni
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
| | - Fabio Nanni
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
| | - Andrea Lucotti
- Dipartimento di Chimica
- Materiali e Ingegneria Chimica
- Politecnico di Milano
- Milano
- Italy
| | - Matteo Tommasini
- Dipartimento di Chimica
- Materiali e Ingegneria Chimica
- Politecnico di Milano
- Milano
- Italy
| | - Alessandro Donazzi
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
| | - Matteo Maestri
- Laboratory of Catalysis and Catalytic Processes
- Dipartimento di Energia
- Politecnico di Milano
- Milano
- Italy
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15
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Schilling C, Hess C. CO Oxidation on Ceria Supported Gold Catalysts Studied by Combined Operando Raman/UV–Vis and IR Spectroscopy. Top Catal 2016. [DOI: 10.1007/s11244-016-0732-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Zhao S, Li Y, Stavitski E, Tappero R, Crowley S, Castaldi MJ, Zakharov DN, Nuzzo RG, Frenkel AI, Stach EA. Operando Characterization of Catalysts through use of a Portable Microreactor. ChemCatChem 2015. [DOI: 10.1002/cctc.201500688] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shen Zhao
- Department of Chemistry; University of Illinois; Urbana IL 61801 USA
- Center for Functional Nanomaterials; Brookhaven National Laboratory; Upton NY 11793 USA
| | - Yuanyuan Li
- Department of Physics; Yeshiva University; New York NY 10016 USA
| | - Eli Stavitski
- Photon Sciences Division; Brookhaven National Laboratory; Upton NY 11973 USA
| | - Ryan Tappero
- Photon Sciences Division; Brookhaven National Laboratory; Upton NY 11973 USA
| | - Stephen Crowley
- Department of Chemical Engineering; City College of New York; New York NY 10031 USA
| | - Marco J. Castaldi
- Department of Chemical Engineering; City College of New York; New York NY 10031 USA
| | - Dmitri N. Zakharov
- Center for Functional Nanomaterials; Brookhaven National Laboratory; Upton NY 11793 USA
| | - Ralph G. Nuzzo
- Department of Chemistry; University of Illinois; Urbana IL 61801 USA
| | | | - Eric A. Stach
- Center for Functional Nanomaterials; Brookhaven National Laboratory; Upton NY 11793 USA
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17
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Wang H, Williams L, Hoe S, Lechuga-Ballesteros D, Vehring R. Quantitative Macro-Raman Spectroscopy on Microparticle-Based Pharmaceutical Dosage Forms. APPLIED SPECTROSCOPY 2015; 69:823-833. [PMID: 26037516 DOI: 10.1366/14-07812] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Quantitative macro-Raman spectroscopy was applied to the analysis of the bulk composition of pharmaceutical drug powders. Powders were extracted from seven commercial lactose-carrier-based dry-powder inhalers: Flixotide 50, 100, 250, and 500 μg/dose (four concentrations of fluticasone propionate) and Seretide 100, 250, and 500 μg/dose (three concentrations of fluticasone propionate, each with 50 μg/dose salmeterol xinafoate ). Also, a carrier-free pressurized metered-dose inhaler of the same combination product, Seretide 50 (50 μg fluticasone propionate and 25 μg salmeterol xinafoate per dose) was tested. The applicability of a custom-designed dispersive macro-Raman instrument with a large sample volume of 0.16 μL was tested to determine the composition of the multicomponent powder samples. To quantify the error caused by sample heterogeneity, a Monte Carlo model was developed to predict the minimum sample volume required for representative sampling of potentially heterogeneous samples at the microscopic level, characterized by different particle-size distributions and compositions. Typical carrier-free respirable powder samples required a minimum sample volume on the order of 10(-4) μL to achieve representative sampling with less than 3% relative error. In contrast, dosage forms containing non-respirable carriers (e.g., lactose) required a sample volume on the order of 0.1 μL for representative measurements. Error analysis of the experimental results showed good agreement with the error predicted by the simulation.
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Affiliation(s)
- Hui Wang
- University of Alberta, Department of Mechanical Engineering, 5-1G Mechanical Engineering Building, Edmonton, AB T6G 2G8, Canada
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18
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Tsakoumis NE, York APE, Chen D, Rønning M. Catalyst characterisation techniques and reaction cells operating at realistic conditions; towards acquisition of kinetically relevant information. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00269a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalyst characterisation techniques and reaction cells operating at realistic conditions; towards acquisition of kinetically relevant information.
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Affiliation(s)
- Nikolaos E. Tsakoumis
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
| | - Andrew P. E. York
- Johnson Matthey Technology Centre
- Blount's Court
- Sonning Common
- Reading RG4 9NH
- UK
| | - De Chen
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
| | - Magnus Rønning
- Department of Chemical Engineering
- Norwegian University of Science and Technology (NTNU)
- NO-7491 Trondheim
- Norway
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19
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Sattler JJHB, Mens AM, Weckhuysen BM. Real-Time Quantitative Operando Raman Spectroscopy of a CrOx/Al2O3Propane Dehydrogenation Catalyst in a Pilot-Scale Reactor. ChemCatChem 2014. [DOI: 10.1002/cctc.201402649] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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21
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Sattler JJHB, Gonzalez-Jimenez ID, Luo L, Stears BA, Malek A, Barton DG, Kilos BA, Kaminsky MP, Verhoeven TWGM, Koers EJ, Baldus M, Weckhuysen BM. Platinum-promoted Ga/Al₂O₃ as highly active, selective, and stable catalyst for the dehydrogenation of propane. Angew Chem Int Ed Engl 2014; 53:9251-6. [PMID: 24989975 PMCID: PMC4499260 DOI: 10.1002/anie.201404460] [Citation(s) in RCA: 152] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 05/31/2014] [Indexed: 11/05/2022]
Abstract
A novel catalyst material for the selective dehydrogenation of propane is presented. The catalyst consists of 1000 ppm Pt, 3 wt% Ga, and 0.25 wt% K supported on alumina. We observed a synergy between Ga and Pt, resulting in a highly active and stable catalyst. Additionally, we propose a bifunctional active phase, in which coordinately unsaturated Ga(3+) species are the active species and where Pt functions as a promoter.
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Affiliation(s)
- Jesper J H B Sattler
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
| | - Ines D Gonzalez-Jimenez
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
| | - Lin Luo
- Hydrocarbons R&D, The Dow Chemical Company2301 N. Brazosport Blvd., Freeport, TX 77541 (USA)
| | - Brien A Stears
- Hydrocarbons R&D, The Dow Chemical Company2301 N. Brazosport Blvd., Freeport, TX 77541 (USA)
| | - Andrzej Malek
- Hydrocarbons R&D, The Dow Chemical Company2301 N. Brazosport Blvd., Freeport, TX 77541 (USA)
| | - David G Barton
- Core R&D, The Dow Chemical Company1776 Building, Midland, MI 48674 (USA)
| | - Beata A Kilos
- Core R&D, The Dow Chemical Company1776 Building, Midland, MI 48674 (USA)
| | - Mark P Kaminsky
- Hydrocarbons R&D, The Dow Chemical Company2301 N. Brazosport Blvd., Freeport, TX 77541 (USA)
| | - Tiny W G M Verhoeven
- Eindhoven University of TechnologyP.O. Box 513, 5600 MB Eindhoven (The Netherlands)
| | - Eline J Koers
- NMR Spectroscopy Research Group, Bijvoet Centre for Biomolecular Research Utrecht UniversityPadualaan 8, 3584 CH Utrecht (The Netherlands)
| | - Marc Baldus
- NMR Spectroscopy Research Group, Bijvoet Centre for Biomolecular Research Utrecht UniversityPadualaan 8, 3584 CH Utrecht (The Netherlands)
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht UniversityUniversiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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22
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Sattler JJHB, Gonzalez-Jimenez ID, Luo L, Stears BA, Malek A, Barton DG, Kilos BA, Kaminsky MP, Verhoeven TWGM, Koers EJ, Baldus M, Weckhuysen BM. Platinum-Promoted Ga/Al2O3as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404460] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Sokolov S, Stoyanova M, Rodemerck U, Linke D, Kondratenko EV. Effect of support on selectivity and on-stream stability of surface VOx species in non-oxidative propane dehydrogenation. Catal Sci Technol 2014. [DOI: 10.1039/c3cy01083j] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Sattler JJHB, González-Jiménez ID, Mens AM, Arias M, Visser T, Weckhuysen BM. Operando UV-Vis spectroscopy of a catalytic solid in a pilot-scale reactor: deactivation of a CrOx/Al2O3 propane dehydrogenation catalyst. Chem Commun (Camb) 2013; 49:1518-20. [DOI: 10.1039/c2cc38978a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Sattler JJHB, Beale AM, Weckhuysen BM. Operando Raman spectroscopy study on the deactivation of Pt/Al2O3 and Pt–Sn/Al2O3 propane dehydrogenation catalysts. Phys Chem Chem Phys 2013; 15:12095-103. [DOI: 10.1039/c3cp50646k] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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26
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Grunwaldt JD, Wagner JB, Dunin-Borkowski RE. Imaging Catalysts at Work: A Hierarchical Approach from the Macro- to the Meso- and Nano-scale. ChemCatChem 2012. [DOI: 10.1002/cctc.201200356] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Yue J, Schouten JC, Nijhuis TA. Integration of Microreactors with Spectroscopic Detection for Online Reaction Monitoring and Catalyst Characterization. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301258j] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jun Yue
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology,
P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology,
P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - T. Alexander Nijhuis
- Laboratory of Chemical Reactor Engineering, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology,
P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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28
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Tverjanovich A, Rodionov K, Bychkov E. Raman spectroscopy of glasses in the As–Te system. J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2012.02.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Tao FF. Operando Studies of Catalyst Surfaces during Catalysis and under Reaction Conditions: Ambient Pressure X-Ray Photoelectron Spectroscopy with a Flow-Cell Reactor. ChemCatChem 2012. [DOI: 10.1002/cctc.201200002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Tao FF. Design of an in-house ambient pressure AP-XPS using a bench-top X-ray source and the surface chemistry of ceria under reaction conditions. Chem Commun (Camb) 2012; 48:3812-4. [PMID: 22403765 DOI: 10.1039/c2cc17715c] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new in-house ambient pressure XPS (AP-XPS) was designed for the study of surfaces of materials under reaction conditions and during catalysis. Unique features of this in-house AP-XPS are the use of monochromated Al Kα and integration of a minimized reaction cell, and working conditions of up to 500 °C in gases of tens of Torr. Generation of oxygen vacancies on ceria and filling them with oxygen atoms were characterized in operando.
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Affiliation(s)
- Franklin Feng Tao
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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31
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Zandbergen MW, Beale AM, Weckhuysen IBM. On the Microdistributions of Cr-Ion Complexes within mm-Sized γ-Al2O3Catalyst Bodies upon Impregnation as Studied by UV/Vis and Raman Microspectroscopy. ChemCatChem 2011. [DOI: 10.1002/cctc.201100333] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Reble C, Gersonde I, Andree S, Eichler HJ, Helfmann J. Quantitative Raman spectroscopy in turbid media. JOURNAL OF BIOMEDICAL OPTICS 2010; 15:037016. [PMID: 20615045 DOI: 10.1117/1.3456370] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Intrinsic Raman spectra of biological tissue are distorted by the influences of tissue absorption and scattering, which significantly challenge signal quantification. A combined Raman and spatially resolved reflectance setup is introduced to measure the absorption coefficient micro(a) and the reduced scattering coefficient micro(s) (') of the tissue, together with the Raman signals. The influence of micro(a) and micro(s) (') on the resonance Raman signal of beta-carotene is measured at 1524 cm(-1) by tissue phantom measurements and Monte Carlo simulations for micro(a)=0.01 to 10 mm(-1) and micro(s) (')=0.1 to 10 mm(-1). Both methods show that the Raman signal drops roughly proportional to 1 micro(a) for micro(a)>0.2 mm(-1) in the measurement geometry and that the influence of micro(s) (') is weaker, but not negligible. Possible correction functions dependent on the elastic diffuse reflectance are investigated to correct the Raman signal for the influence of micro(a) and micro(s) ('), provided that micro(a) and micro(s) (') are measured as well. A correction function based on the Monte Carlo simulation of Raman signals is suggested as an alternative. Both approaches strongly reduce the turbidity-induced variation of the Raman signals and allow absolute Raman scattering coefficients to be determined.
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Affiliation(s)
- Carina Reble
- Technical University Berlin, Institute for Optics and Atomic Physics, 10587 Berlin, Germany.
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33
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Wachs IE, Roberts CA. Monitoring surface metal oxide catalytic active sites with Raman spectroscopy. Chem Soc Rev 2010; 39:5002-17. [DOI: 10.1039/c0cs00145g] [Citation(s) in RCA: 233] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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34
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Bentrup U. Combining in situ characterization methods in one set-up: looking with more eyes into the intricate chemistry of the synthesis and working of heterogeneous catalysts. Chem Soc Rev 2010; 39:4718-30. [DOI: 10.1039/b919711g] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Newton MA, van Beek W. Combining synchrotron-based X-ray techniques with vibrational spectroscopies for the in situ study of heterogeneous catalysts: a view from a bridge. Chem Soc Rev 2010; 39:4845-63. [DOI: 10.1039/b919689g] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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36
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Weckhuysen B. Chemical Imaging of Spatial Heterogeneities in Catalytic Solids at Different Length and Time Scales. Angew Chem Int Ed Engl 2009; 48:4910-43. [DOI: 10.1002/anie.200900339] [Citation(s) in RCA: 319] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Weckhuysen B. Chemische Bildgebung von räumlichen Heterogenitäten in katalytischen Festkörpern auf unterschiedlichen Längen- und Zeitskalen. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900339] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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39
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Barman I, Singh GP, Dasari RR, Feld MS. Turbidity-corrected Raman spectroscopy for blood analyte detection. Anal Chem 2009; 81:4233-40. [PMID: 19413337 PMCID: PMC2864606 DOI: 10.1021/ac8025509] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A major challenge in quantitative biological Raman spectroscopy, particularly as applied to transcutaneous Raman spectroscopy measurements, is overcoming the deleterious effects of scattering and absorption (turbidity). The Raman spectral information is distorted by multiple scattering and absorption events in the surrounding medium, thereby diminishing the prediction capability of the calibration model. To account for these distortions, we present a novel analytical method, that we call turbidity-corrected Raman spectroscopy (TCRS), which is based on the photon migration approach and employs alternate acquisition of diffuse reflectance and Raman spectra. We demonstrate that, upon application of TCRS, the widely varying Raman spectra observed from a set of tissue phantoms having the same concentration of Raman scatterers but different turbidities has a tendency to collapse onto a single spectral profile. Furthermore, in a prospective study that employs physical tissue models with varying turbidities and randomized concentrations of Raman scatterers and interfering agents, a 20% reduction in prediction error is obtained by applying the turbidity correction procedure to the observed Raman spectra.
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Affiliation(s)
- Ishan Barman
- Laser Biomedical Research Center, G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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40
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Hohn KL, Lin YC. Catalytic partial oxidation of methanol and ethanol for hydrogen generation. CHEMSUSCHEM 2009; 2:927-940. [PMID: 19728348 DOI: 10.1002/cssc.200900104] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hydrogen-powered fuel cell vehicles feature high energy efficiency and minor environmental impact. Liquid fuels are ideal hydrogen carriers, which can catalytically be converted into syngas or hydrogen to power vehicles. Among the potential liquid fuels, alcohols have several advantages. The hydrogen/carbon ratio is higher than that of other liquid hydrocarbons or oxygenates, especially in the case of methanol. In addition, alcohols can be derived from renewable biomass resources. Catalytic partial oxidation of methanol or ethanol offers immense potential for onboard hydrogen generation due to its rapid reaction rate and exothermic nature. These benefits stimulate a burgeoning research community in catalyst design, reaction engineering, and mechanistic investigation. The purpose of this Minireview is to provide insight into syngas and hydrogen production from methanol and ethanol partial oxidation, particularly highlighting catalytic chemistry.
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Affiliation(s)
- Keith L Hohn
- Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506-5102, USA
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41
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Luan J, Pan B, Paz Y, Li Y, Wu X, Zou Z. Structural, photophysical and photocatalytic properties of new Bi2SbVO7 under visible light irradiation. Phys Chem Chem Phys 2009; 11:6289-98. [DOI: 10.1039/b815260h] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Jentoft FC. Chapter 3 Ultraviolet–Visible–Near Infrared Spectroscopy in Catalysis. ADVANCES IN CATALYSIS 2009. [DOI: 10.1016/s0360-0564(08)00003-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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43
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Bechtel KL, Shih WC, Feld MS. Intrinsic Raman spectroscopy for quantitative biological spectroscopy part II: experimental applications. OPTICS EXPRESS 2008; 16:12737-45. [PMID: 18711512 PMCID: PMC2845389 DOI: 10.1364/oe.16.012737] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We demonstrate the effectiveness of intrinsic Raman spectroscopy (IRS) at reducing errors caused by absorption and scattering. Physical tissue models, solutions of varying absorption and scattering coefficients with known concentrations of Raman scatterers, are studied. We show significant improvement in prediction error by implementing IRS to predict concentrations of Raman scatterers using both ordinary least squares regression (OLS) and partial least squares regression (PLS). In particular, we show that IRS provides a robust calibration model that does not increase in error when applied to samples with optical properties outside the range of calibration.
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Affiliation(s)
- Kate L Bechtel
- GR Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, 77 Massachusetts Avenue,Cambridge, MA 02139, USA
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44
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Shih WC, Bechtel KL, Feld MS. Intrinsic Raman spectroscopy for quantitative biological spectroscopy part I: theory and simulations. OPTICS EXPRESS 2008; 16:12726-36. [PMID: 18711511 PMCID: PMC2840632 DOI: 10.1364/oe.16.012726] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We present a novel technique, intrinsic Raman spectroscopy (IRS), to correct turbidity-induced Raman spectral distortions, resulting in the intrinsic Raman spectrum that would be observed in the absence of scattering and absorption. We develop an expression relating the observed and intrinsic Raman spectra through diffuse reflectance using the photon migration depiction of light transport. Numerical simulations are employed to validate the theoretical results and study the dependence of this expression on sample size and elastic scattering anisotropy.
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45
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Sobalík Z, Jíša K, Jirglová H, Bernauer B. Simultaneous FTIR/UV-Vis study of reactions over metallo-zeolites. Catal Today 2007. [DOI: 10.1016/j.cattod.2006.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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Bennici S, Vogelaar B, Nijhuis T, Weckhuysen B. Real-Time Control of a Catalytic Solid in a Fixed-Bed Reactor Based on In Situ Spectroscopy. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700499] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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47
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Bennici SM, Vogelaar BM, Nijhuis TA, Weckhuysen BM. Real-Time Control of a Catalytic Solid in a Fixed-Bed Reactor Based on In Situ Spectroscopy. Angew Chem Int Ed Engl 2007; 46:5412-6. [PMID: 17554745 DOI: 10.1002/anie.200700499] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Simona M Bennici
- Inorganic Chemistry and Catalysis Group, Department of Chemistry, Utrecht University, 3508 TB Utrecht, The Netherlands
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48
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Wu Z, Zhang C, Stair PC. Influence of absorption on quantitative analysis in Raman spectroscopy. Catal Today 2006. [DOI: 10.1016/j.cattod.2005.11.077] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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49
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Tinnemans SJ, Mesu JG, Kervinen K, Visser T, Nijhuis TA, Beale AM, Keller DE, van der Eerden AM, Weckhuysen BM. Combining operando techniques in one spectroscopic-reaction cell: New opportunities for elucidating the active site and related reaction mechanism in catalysis. Catal Today 2006. [DOI: 10.1016/j.cattod.2005.11.076] [Citation(s) in RCA: 124] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Building on PCCP’s success–weekly publication in 2006. Phys Chem Chem Phys 2006. [DOI: 10.1039/b516769h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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