1
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Neisius NA, MacHale LT, Snyder ER, Finke RG, Prieto AL. Copper Selenophosphate, Cu 3PSe 4, Nanoparticle Synthesis: Octadecane Is the Key to a Simplified, Atom-Economical Reaction. NANO LETTERS 2023; 23:11430-11437. [PMID: 38085913 DOI: 10.1021/acs.nanolett.3c02620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Nanoparticle syntheses are designed to produce the desired product in high yield but traditionally neglect atom-economy. Here we report that the simple, but significant, change of the solvent from 1-octadecene (1-ODE) to the operationally inert octadecane (ODA) permits an atom-economical synthesis of copper selenophosphate (Cu3PSe4) nanoparticles. This change eliminates the competing selenium (Se) delivery pathways from our first report that required an excess of Se. Instead Se0powder is dispersed in ODA, which promotes a formal eight-electron transfer between Cu3-xP and Se0. Powder X-ray diffraction and transmission electron microscopy confirm the purity of the Cu3PSe4, while 1H and 13C NMR indicate the absence of oxidized ODA or Se species. We utilize the direct pathway to gain insights into stoichiometry and ligand identity using thermogravimetric analysis and X-ray photoelectron spectroscopy. Given the prevalence of 1-ODE in nanoparticle synthesis, this approach could be applied to other chalcogenide reaction pathways to improve stoichiometry and atom-economy.
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Affiliation(s)
- Nathan A Neisius
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Luke T MacHale
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Erin R Snyder
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Richard G Finke
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Amy L Prieto
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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2
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Liu L, Corma A. Bimetallic Sites for Catalysis: From Binuclear Metal Sites to Bimetallic Nanoclusters and Nanoparticles. Chem Rev 2023; 123:4855-4933. [PMID: 36971499 PMCID: PMC10141355 DOI: 10.1021/acs.chemrev.2c00733] [Citation(s) in RCA: 57] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Indexed: 03/29/2023]
Abstract
Heterogeneous bimetallic catalysts have broad applications in industrial processes, but achieving a fundamental understanding on the nature of the active sites in bimetallic catalysts at the atomic and molecular level is very challenging due to the structural complexity of the bimetallic catalysts. Comparing the structural features and the catalytic performances of different bimetallic entities will favor the formation of a unified understanding of the structure-reactivity relationships in heterogeneous bimetallic catalysts and thereby facilitate the upgrading of the current bimetallic catalysts. In this review, we will discuss the geometric and electronic structures of three representative types of bimetallic catalysts (bimetallic binuclear sites, bimetallic nanoclusters, and nanoparticles) and then summarize the synthesis methodologies and characterization techniques for different bimetallic entities, with emphasis on the recent progress made in the past decade. The catalytic applications of supported bimetallic binuclear sites, bimetallic nanoclusters, and nanoparticles for a series of important reactions are discussed. Finally, we will discuss the future research directions of catalysis based on supported bimetallic catalysts and, more generally, the prospective developments of heterogeneous catalysis in both fundamental research and practical applications.
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Affiliation(s)
- Lichen Liu
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Avelino Corma
- Instituto
de Tecnología Química, Universitat
Politècnica de València−Consejo Superior de Investigaciones
Científicas (UPV-CSIC), Avenida de los Naranjos s/n, Valencia 46022, Spain
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3
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Razdan NK, Lin TC, Bhan A. Concepts Relevant for the Kinetic Analysis of Reversible Reaction Systems. Chem Rev 2023; 123:2950-3006. [PMID: 36802557 DOI: 10.1021/acs.chemrev.2c00510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The net rate of a reversible chemical reaction is the difference between unidirectional rates of traversal along forward and reverse reaction paths. In a multistep reaction sequence, the forward and reverse trajectories, in general, are not the microscopic reverse of one another; rather, each unidirectional route is comprised of distinct rate-controlling steps, intermediates, and transition states. Consequently, traditional descriptors of rate (e.g., reaction orders) do not reflect intrinsic kinetic information but instead conflate unidirectional contributions determined by (i) the microscopic occurrence of forward/reverse reactions (i.e., unidirectional kinetics) and (ii) the reversibility of reaction (i.e., nonequilibrium thermodynamics). This review aims to provide a comprehensive resource of analytical and conceptual tools which deconvolute the contributions of reaction kinetics and thermodynamics to disambiguate unidirectional reaction trajectories and precisely identify rate- and reversibility-controlling molecular species and steps in reversible reaction systems. The extrication of mechanistic and kinetic information from bidirectional reactions is accomplished through equation-based formalisms (e.g., De Donder relations) grounded in principles of thermodynamics and interpreted in the context of theories of chemical kinetics developed in the past 25 years. The aggregate of mathematical formalisms detailed herein is general to thermochemical and electrochemical reactions and encapsulates a diverse body of scientific literature encompassing chemical physics, thermodynamics, chemical kinetics, catalysis, and kinetic modeling.
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Affiliation(s)
- Neil K Razdan
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Ting C Lin
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
| | - Aditya Bhan
- Department of Chemical Engineering and Materials Science, University of Minnesota─Twin Cities, 421 Washington Avenue SE, Minneapolis, Minnesota 55455, United States
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4
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Agarwal H, Florian J, Pert D, Goldsmith BR, Singh N. Explaining Kinetic Trends of Inner-Sphere Transition-Metal-Ion Redox Reactions on Metal Electrodes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Harsh Agarwal
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan48109-2136, United States
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan48109-2136, United States
| | - Jacob Florian
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan48109-2136, United States
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan48109-2136, United States
| | - Daniel Pert
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan48109-2136, United States
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan48109-2136, United States
| | - Bryan R. Goldsmith
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan48109-2136, United States
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan48109-2136, United States
| | - Nirala Singh
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan48109-2136, United States
- Catalysis Science and Technology Institute, University of Michigan, Ann Arbor, Michigan48109-2136, United States
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5
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Buchanan C, Herrera D, Balasubramanian M, Goldsmith BR, Singh N. Unveiling the Cerium(III)/(IV) Structures and Charge-Transfer Mechanism in Sulfuric Acid. JACS AU 2022; 2:2742-2757. [PMID: 36590268 PMCID: PMC9795571 DOI: 10.1021/jacsau.2c00484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/28/2022] [Accepted: 10/05/2022] [Indexed: 06/17/2023]
Abstract
The Ce3+/Ce4+ redox couple has a charge transfer (CT) with extreme asymmetry and a large shift in redox potential depending on electrolyte composition. The redox potential shift and CT behavior are difficult to understand because neither the cerium structures nor the CT mechanism are well understood, limiting efforts to improve the Ce3+/Ce4+ redox kinetics in applications such as energy storage. Herein, we identify the Ce3+ and Ce4+ structures and CT mechanism in sulfuric acid via extended X-ray absorption fine structure spectroscopy (EXAFS), kinetic measurements, and density functional theory (DFT) calculations. We show EXAFS evidence that confirms that Ce3+ is coordinated by nine water molecules and suggests that Ce4+ is complexed by water and three bisulfates in sulfuric acid. Despite the change in complexation within the first coordination shell between Ce3+ and Ce4+, we show that the kinetics are independent of the electrode, suggesting outer-sphere electron-transfer behavior. We identify a two-step mechanism where Ce4+ exchanges the bisulfate anions with water in a chemical step followed by a rate-determining electron transfer step that follows Marcus theory (MT). This mechanism is consistent with all experimentally observed structural and kinetic data. The asymmetry of the Ce3+/Ce4+ CT and the observed shift in the redox potential with acid is explained by the addition of the chemical step in the CT mechanism. The fitted parameters from this rate law qualitatively agree with DFT-predicted free energies and the reorganization energy. The combination of a two-step mechanism with MT should be considered for other metal ion CT reactions whose kinetics have not been appropriately described.
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Affiliation(s)
- Cailin
A. Buchanan
- Department
of Chemical Engineering, University of Michigan-Ann
Arbor, Ann Arbor, Michigan48109, United
States
- Catalysis
Science and Technology Institute, University
of Michigan-Ann Arbor, Ann Arbor, Michigan48109, United States
| | - Dylan Herrera
- Department
of Chemical Engineering, University of Michigan-Ann
Arbor, Ann Arbor, Michigan48109, United
States
- Catalysis
Science and Technology Institute, University
of Michigan-Ann Arbor, Ann Arbor, Michigan48109, United States
| | - Mahalingam Balasubramanian
- Advanced
Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois60439, United States
| | - Bryan R. Goldsmith
- Department
of Chemical Engineering, University of Michigan-Ann
Arbor, Ann Arbor, Michigan48109, United
States
- Catalysis
Science and Technology Institute, University
of Michigan-Ann Arbor, Ann Arbor, Michigan48109, United States
| | - Nirala Singh
- Department
of Chemical Engineering, University of Michigan-Ann
Arbor, Ann Arbor, Michigan48109, United
States
- Catalysis
Science and Technology Institute, University
of Michigan-Ann Arbor, Ann Arbor, Michigan48109, United States
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Abstract
Orders in catalyst greater than one can be attributed to several different reaction mechanisms. Differentiating among these possibilities requires careful analysis of their rate laws, rational experiment design and accurate measurement of the progress of the reactions. We have compiled the most popular mechanisms proposed for reactions with an order in catalyst greater than one and derived their steady-state rate laws. We have analysed the rate laws and proposed experiments to discern between mechanisms. Finally, we have examined 100 case studies that showcase good practices to propose robust mechanisms and to avoid common pitfalls.
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7
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Tuttle RR, Finke RG, Reynolds MM. Cu II Lewis Acid, Proton-Coupled Electron Transfer Mechanism for Cu-Metal–Organic Framework-Catalyzed NO Release from S-Nitrosoglutathione. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00477] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Robert R. Tuttle
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Richard G. Finke
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Melissa M. Reynolds
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- School of Biomedical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Chemical & Biological Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
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9
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10
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Watzky MA, Finke RG. Pseudoelementary Steps: A Key Concept and Tool for Studying the Kinetics and Mechanisms of Complex Chemical Systems. J Phys Chem A 2021; 125:10687-10705. [PMID: 34928167 DOI: 10.1021/acs.jpca.1c07851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The concept of a pseudoelementary step (PEStep) is reviewed, a key concept for approaching the analysis of kinetics data and associated, underlying mechanisms of complex chemical systems. Following a brief Introduction, a definition of a PEStep is given: a PEStep is an initial building block for more complex reactions, that is a starting point for the initial analysis of the observed kinetics and then constructing initial, deliberately minimalistic mechanistic models for complex reactions. PESteps are, therefore and typically, composites of underlying elementary step reactions and can be very useful if not required for the inverse problem of discovering mechanisms from experimental observables for complex reactions. It is the use of PESteps in the inverse problem of mechanism determination that is a primary focus of this review. After a section detailing the results of a literature search of "pseudoelementary step" and related terms such as "pseudoelementary process", pedagogically illustrative examples are given of the use of the PEStep concept in approaching and elucidating the mechanisms of complex reactions. This review shows how the underlying elementary steps of a catalytic cycle were successfully uncovered via a PEStep approach, addresses the classic case of the use of PESteps in determining the mechanisms of oscillating reactions, and examines a well-studied case of an Ir(0)n nanoparticle formation reaction. This latter example is illustrative in that the Ir(0)n nanoparticle formation reaction consisting of thousands of underlying elementary steps that, however, can be treated initially kinetically as just two PESteps, a reduction in complexity of 3 orders of magnitude. Known weaknesses and caveats of the PEStep approach are also summarized and discussed. A short summary of Horituti's "Stoichiometric Number" concept is provided, a concept that would appear to merit further investigation and use in the study of complex reactions. Finally, a section is provided that lists a few, selected areas where the PEStep concept and methodology are expected to prove especially important in the future, and a Conclusions section is provided that lists 11 bullet points. The latter serves as a summary of this first review of the PEStep concept and its importance in dealing with the kinetics and in elucidating the mechanisms of more complex, multistep reactions.
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Affiliation(s)
- Murielle A Watzky
- Department of Chemistry and Biochemistry, University of Northern Colorado, Greeley, Colorado 80639, United States
| | - Richard G Finke
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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11
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Cao V, Ndé-Tchoupé AI, Hu R, Gwenzi W, Noubactep C. The mechanism of contaminant removal in Fe(0)/H 2O systems: The burden of a poor literature review. CHEMOSPHERE 2021; 280:130614. [PMID: 33940455 DOI: 10.1016/j.chemosphere.2021.130614] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/14/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
The global effort to mitigate the impact of environmental pollution has led to the use of various types of metallic iron (Fe(0)) in the remediation of soil and groundwater as well as in the treatment of industrial and municipal effluents. During the past three decades, hundreds of scientific publications have controversially discussed the mechanism of contaminant removal in Fe(0)/H2O systems, with the large majority considering Fe(0) to be oxidized by contaminants of concern. This view assumes that contaminant reduction is the cathodic reaction occurring simultaneously with Fe0 oxidative dissolution (anodic reaction). This view contradicts the century-old theory of the electrochemical nature of aqueous iron corrosion and hinders progress in designing efficient and sustainable remediation Fe(0)/H2O systems. The aim of the present communication is to demonstrate the fallacy of the current prevailing view based on articles published before 1910. It is shown that properly reviewing the literature would have avoided the mistake. Going back to the roots is recommended as the way forward and should be considered first while designing laboratory experiments.
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Affiliation(s)
- Viet Cao
- Faculty of Natural Sciences, Hung Vuong University, Nguyen Tat Thanh Street, Viet Tri, 35120, Phu Tho, Viet Nam.
| | - Arnaud Igor Ndé-Tchoupé
- School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing, 211100, China.
| | - Rui Hu
- School of Earth Science and Engineering, Hohai University, Fo Cheng Xi Road 8, Nanjing, 211100, China.
| | - Willis Gwenzi
- Biosystems and Environmental Engineering Research Group, Department of Soil Science and Agricultural Engineering, University of Zimbabwe, P.O. Box MP167, Mt. Pleasant, Harare, Zimbabwe.
| | - Chicgoua Noubactep
- Department of Applied Geology, University of Göttingen, Goldschmidtstraße 3, D-37077, Göttingen, Germany; Centre for Modern Indian Studies (CeMIS), Universität Göttingen, Waldweg 26, 37073, Göttingen, Germany; Department of Water and Environmental Science and Engineering, Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania; Faculty of Science and Technology, Campus of Banekane, Université des Montagnes, P.O. Box 208, Bangangté, Cameroon.
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12
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Tantillo DJ, Laconsay CJ. Melding of Experiment and Theory Illuminates Mechanisms of Metal-Catalyzed Rearrangements: Computational Approaches and Caveats. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1720451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractThis review summarizes approaches and caveats in computational modeling of transition-metal-catalyzed sigmatropic rearrangements involving carbene transfer. We highlight contemporary examples of combined synthetic and theoretical investigations that showcase the synergy achievable by integrating experiment and theory.1 Introduction2 Mechanistic Models3 Theoretical Approaches and Caveats3.1 Recommended Computational Tools3.2 Choice of Functional and Basis Set3.3 Conformations and Ligand-Binding Modes3.4 Solvation4 Synergy of Experiment and Theory – Case Studies4.1 Metal-Bound or Free Ylides?4.2 Conformations and Ligand-Binding Modes of Paddlewheel Complexes4.3 No Metal, Just Light4.4 How To ‘Cope’ with Nonstatistical Dynamic Effects5 Outlook
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13
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Affiliation(s)
- Agustí Lledós
- Departament de Química Universitat Autònoma de Barcelona Campus UAB 08193 Cerdanyola del Vallès Catalonia Spain
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14
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Li M, Sakong S, Groß A. In Search of the Active Sites for the Selective Catalytic Reduction on Tungsten-Doped Vanadia Monolayer Catalysts Supported by TiO 2. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01406] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mengru Li
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
| | - Sung Sakong
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89069 Ulm, Germany
- Helmholtz Institute Ulm (HIU), Electrochemical Energy Storage, 89069 Ulm, Germany
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15
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Chee SW, Lunkenbein T, Schlögl R, Cuenya BR. In situand operandoelectron microscopy in heterogeneous catalysis-insights into multi-scale chemical dynamics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:153001. [PMID: 33825698 DOI: 10.1088/1361-648x/abddfd] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
This review features state-of-the-artin situandoperandoelectron microscopy (EM) studies of heterogeneous catalysts in gas and liquid environments during reaction. Heterogeneous catalysts are important materials for the efficient production of chemicals/fuels on an industrial scale and for energy conversion applications. They also play a central role in various emerging technologies that are needed to ensure a sustainable future for our society. Currently, the rational design of catalysts has largely been hampered by our lack of insight into the working structures that exist during reaction and their associated properties. However, elucidating the working state of catalysts is not trivial, because catalysts are metastable functional materials that adapt dynamically to a specific reaction condition. The structural or morphological alterations induced by chemical reactions can also vary locally. A complete description of their morphologies requires that the microscopic studies undertaken span several length scales. EMs, especially transmission electron microscopes, are powerful tools for studying the structure of catalysts at the nanoscale because of their high spatial resolution, relatively high temporal resolution, and complementary capabilities for chemical analysis. Furthermore, recent advances have enabled the direct observation of catalysts under realistic environmental conditions using specialized reaction cells. Here, we will critically discuss the importance of spatially-resolvedoperandomeasurements and the available experimental setups that enable (1) correlated studies where EM observations are complemented by separate measurements of reaction kinetics or spectroscopic analysis of chemical species during reaction or (2) real-time studies where the dynamics of catalysts are followed with EM and the catalytic performance is extracted directly from the reaction cell that is within the EM column or chamber. Examples of current research in this field will be presented. Challenges in the experimental application of these techniques and our perspectives on the field's future directions will also be discussed.
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Affiliation(s)
- See Wee Chee
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany
| | - Thomas Lunkenbein
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany
| | - Robert Schlögl
- Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany
- Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, 45413 Mülheim an der Ruhr, Germany
| | - Beatriz Roldan Cuenya
- Department of Interface Science, Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany
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16
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Stephens KJ, Allgeier AM, Bell AL, Carlson TR, Cheng Y, Douglas JT, Howe LA, Menning CA, Neuenswander SA, Sengupta SK, Thapa PS, Ritter JC. A Mechanistic Study of Polyol Hydrodeoxygenation over a Bifunctional Pt-WO x/TiO 2 Catalyst. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03475] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyle J. Stephens
- Department of Chemical & Petroleum Engineering and Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, Kansas 66045, United States
| | - Alan M. Allgeier
- Department of Chemical & Petroleum Engineering and Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, Kansas 66045, United States
| | - Alysha L. Bell
- Department of Chemical & Petroleum Engineering and Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, Kansas 66045, United States
| | - Torren R. Carlson
- E. I. du Pont de Nemours and Company Experimental Station, Wilmington, Delaware 19803, United States
| | - Yan Cheng
- Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50011 United States
| | - Justin T. Douglas
- Nuclear Magnetic Resonance Core Lab, University of Kansas, Lawrence, Kansas 66045, United States
| | - Laurie A. Howe
- E. I. du Pont de Nemours and Company Experimental Station, Wilmington, Delaware 19803, United States
| | - Carl A. Menning
- E. I. du Pont de Nemours and Company Experimental Station, Wilmington, Delaware 19803, United States
| | - Sarah A. Neuenswander
- Nuclear Magnetic Resonance Core Lab, University of Kansas, Lawrence, Kansas 66045, United States
| | - Sourav K. Sengupta
- E. I. du Pont de Nemours and Company Experimental Station, Wilmington, Delaware 19803, United States
| | - Prem S. Thapa
- Microscopy and Analytical Imaging Core Lab, University of Kansas, Lawrence, Kansas 66045, United States
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17
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Mollar‐Cuni A, Byrne JP, Borja P, Vicent C, Albrecht M, Mata JA. Selective Conversion of Various Monosaccharaides into Sugar Acids by Additive‐Free Dehydrogenation in Water. ChemCatChem 2020. [DOI: 10.1002/cctc.202000544] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Andres Mollar‐Cuni
- Institute of Advanced Materials (INAM) Centro de Innovación en Química Avanzada (ORFEO-CINCA)Universitat Jaume I Avda. Sos Baynat s/n 12006 Castellón Spain
| | - Joseph P. Byrne
- Department of Chemistry & Biochemistry.University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Pilar Borja
- Institute of Advanced Materials (INAM) Centro de Innovación en Química Avanzada (ORFEO-CINCA)Universitat Jaume I Avda. Sos Baynat s/n 12006 Castellón Spain
| | - Cristian Vicent
- Servei Central d'Instrumentació Científica (SCIC)Universitat Jaume I Avda. Sos Baynat s/n 12006 Castellón Spain
| | - Martin Albrecht
- Department of Chemistry & Biochemistry.University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Jose A. Mata
- Institute of Advanced Materials (INAM) Centro de Innovación en Química Avanzada (ORFEO-CINCA)Universitat Jaume I Avda. Sos Baynat s/n 12006 Castellón Spain
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18
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Lunkenbein T, Masliuk L, Plodinec M, Algara-Siller G, Jung S, Jastak M, Kube P, Trunschke A, Schlögl R. Site specific and localized structural displacements in open structured multimetallic oxides. NANOSCALE 2020; 12:6759-6766. [PMID: 32167100 DOI: 10.1039/c9nr09041j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The structures of solids can locally differ from the macroscopic picture obtained by structural averaging techniques. This difference significantly influences the performance of any functional material. Measurements of these local structures are challenging. Thus, the description of defects is often disregarded. However, in order to understand the functionality, such irregularities have to be investigated. Here, we present a high resolution scanning transmission electron microscopic (STEM) study revealing local structural irregularities in open structured oxides using catalytically active orthorhombic (Mo,V,Te,Nb)Ox as a complex example. Detailed analysis of annular dark field- and annular bright field-STEM images reveal site specific local structural displacements of individual framework and channel sites in the picometer range. These experimental observables can be considered as an important structural addendum for theoretical modelling and should be implemented into the existing data in order to quantify site specific potential energies and stresses. This information can further be used to describe the impact of the structure on the catalytic performance in greater detail.
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Affiliation(s)
- Thomas Lunkenbein
- Department of Inorganic Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
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19
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20
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Kaphan DM, Ferrandon MS, Langeslay RR, Celik G, Wegener EC, Liu C, Niklas J, Poluektov OG, Delferro M. Mechanistic Aspects of a Surface Organovanadium(III) Catalyst for Hydrocarbon Hydrogenation and Dehydrogenation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02800] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- David M. Kaphan
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Magali S. Ferrandon
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Ryan R. Langeslay
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Gokhan Celik
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Evan C. Wegener
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Cong Liu
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Jens Niklas
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Oleg G. Poluektov
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
| | - Massimiliano Delferro
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, United States
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